Southwest Airlines flight WN 1821: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Thu,Fri,Sun 06:20 Seattle-Tacoma (SEA) 08:50 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-01-11 through 2026-01-16
Mon,Sun 06:20 Seattle-Tacoma (SEA) 08:50 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 06:20 Seattle-Tacoma (SEA) 08:50 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-01 through 2026-02-06
Mon,Sun 06:20 Seattle-Tacoma (SEA) 08:50 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 06:20 Seattle-Tacoma (SEA) 08:50 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-17 through 2026-02-23
Mon 06:20 Seattle-Tacoma (SEA) 08:50 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Operates only on 2026-03-02
Mon,Thu,Fri 06:30 Seattle-Tacoma (SEA) 09:00 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 06:30 Seattle-Tacoma (SEA) 09:00 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-20 through 2026-03-01
Tue,Wed 08:00 Nashville (BNA) 10:15 Los Angeles (LAX) 1
WN 1821 Non-stop Boeing 737-800 (73H) 4:15 Effective 2026-06-09 through 2026-07-29
Sun 08:40 San Diego (SAN) 1 11:15 Eugene (EUG)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Operates only on 2026-05-24
Mon-Fri 08:45 Seattle-Tacoma (SEA) 11:15 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 08:45 Seattle-Tacoma (SEA) 11:15 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-01-18 through 2026-01-23
Mon-Fri 08:45 Seattle-Tacoma (SEA) 11:15 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 08:45 Seattle-Tacoma (SEA) 11:15 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-08 through 2026-02-11
Tue,Wed 08:45 Seattle-Tacoma (SEA) 11:15 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-18 through 2026-03-04
Mon,Thu,Fri 08:55 San Diego (SAN) 1 11:30 Eugene (EUG)
WN 1821 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-04-09 through 2026-06-01
Sat 09:25 Seattle-Tacoma (SEA) 12:00 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-01-10 through 2026-02-07
Mon,Thu,Fri 09:35 Las Vegas Harry Reid (LAS) 1 10:45 Santa Ana (SNA)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 09:35 Las Vegas Harry Reid (LAS) 1 10:45 Santa Ana (SNA)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:10 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 11:20 Santa Ana (SNA) 16:05 Austin (AUS)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:45 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 11:20 Santa Ana (SNA) 16:05 Austin (AUS)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:45 Effective 2026-02-20 through 2026-03-01
Tue,Wed 11:20 San Antonio (SAT) A 11:50 Phoenix Sky Harbor (PHX) 4
WN 1821 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Effective 2026-04-07 through 2026-06-03
Sat 12:20 San Diego (SAN) 1 14:55 Eugene (EUG)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-04-11 through 2026-05-30
Wed,Thu 12:30 San Diego (SAN) 1 14:05 San Jose (SJC) B
WN 1821 Non-stop Boeing 737-700 (73W) 1:35 Valid until 2026-01-01
Sun 12:35 San Diego (SAN) 1 15:10 Eugene (EUG)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-04-12 through 2026-05-17
Sun 12:35 San Diego (SAN) 1 15:10 Eugene (EUG)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Operates only on 2026-05-31
Fri,Sun 14:00 San Diego (SAN) 1 15:30 San Jose (SJC) B
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:30 Effective 2026-01-02 through 2026-01-04
Mon 14:30 San Diego (SAN) 1 16:00 San Jose (SJC) B
WN 1821 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Operates only on 2026-01-05
Sat 14:40 Spokane (GEG) 16:30 Sacramento (SMF) B
WN 1821 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Effective 2026-08-08 through 2026-09-26
Mon,Thu,Fri 14:50 Albuquerque (ABQ) 15:30 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2026-08-06 through 2026-09-28
Mon,Thu,Fri 16:40 Austin (AUS) 20:15 Fort Lauderdale (FLL) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 16:40 Austin (AUS) 20:15 Fort Lauderdale (FLL) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-02-20 through 2026-03-01
Sat 18:10 Luis Munoz Marin, San Juan (SJU) B 20:10 Fort Lauderdale (FLL) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-02-14 through 2026-02-28
Sun 18:45 Spokane (GEG) 20:35 Sacramento (SMF) B
WN 1821 Non-stop Boeing 737-800 (73H) 1:50 Effective 2026-08-09 through 2026-09-27
Mon,Thu,Fri 19:15 Portland (PDX) 21:00 San Jose (SJC) B
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:45 Effective 2026-03-05 through 2026-04-06
Mon,Thu,Fri 20:50 Fort Lauderdale (FLL) 1 23:20 Baltimore (BWI)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 20:50 Fort Lauderdale (FLL) 1 23:20 Baltimore (BWI)
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-20 through 2026-03-01
Sun 21:15 San Jose (SJC) B 22:40 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-03-08 through 2026-04-05
Sat 21:25 San Jose (SJC) B 22:50 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-03-07 through 2026-04-04
Tue,Wed 21:30 San Jose (SJC) B 22:55 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737 MAX 8 (7M8) 1:25 Effective 2026-03-10 through 2026-04-01
Mon,Thu,Fri 21:35 San Jose (SJC) B 23:00 Las Vegas Harry Reid (LAS) 1
WN 1821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2026-03-05 through 2026-04-06
Non-Direct Flights:
Mon,Thu,Fri 06:30 Seattle-Tacoma (SEA) 10:45 Santa Ana (SNA)
WN 1821 1-stop Boeing 737-700 (Scimitar Winglets) 4:15 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 06:30 Seattle-Tacoma (SEA) 10:45 Santa Ana (SNA)
WN 1821 1-stop Boeing 737-700 (Scimitar Winglets) 4:15 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 09:35 Las Vegas Harry Reid (LAS) 1 16:05 Austin (AUS)
WN 1821 1-stop Boeing 737-700 (Scimitar Winglets) 4:30 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 09:35 Las Vegas Harry Reid (LAS) 1 16:05 Austin (AUS)
WN 1821 1-stop Boeing 737-700 (Scimitar Winglets) 4:30 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 11:20 Santa Ana (SNA) 20:15 Fort Lauderdale (FLL) 1
WN 1821 1-stop Boeing 737-700 (Scimitar Winglets) 5:55 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 11:20 Santa Ana (SNA) 20:15 Fort Lauderdale (FLL) 1
WN 1821 1-stop Boeing 737-700 (Scimitar Winglets) 5:55 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 16:40 Austin (AUS) 23:20 Baltimore (BWI)
WN 1821 1-stop Boeing 737-700 (Scimitar Winglets) 5:40 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 16:40 Austin (AUS) 23:20 Baltimore (BWI)
WN 1821 1-stop Boeing 737-700 (Scimitar Winglets) 5:40 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 19:15 Portland (PDX) 23:00 Las Vegas Harry Reid (LAS) 1
WN 1821 1-stop Boeing 737-700 (Scimitar Winglets) 3:45 Effective 2026-03-05 through 2026-04-06
Mon,Thu,Fri 06:30 Seattle-Tacoma (SEA) 16:05 Austin (AUS)
WN 1821 2-stop Boeing 737-700 (Scimitar Winglets) 7:35 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 06:30 Seattle-Tacoma (SEA) 16:05 Austin (AUS)
WN 1821 2-stop Boeing 737-700 (Scimitar Winglets) 7:35 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 09:35 Las Vegas Harry Reid (LAS) 1 20:15 Fort Lauderdale (FLL) 1
WN 1821 2-stop Boeing 737-700 (Scimitar Winglets) 7:40 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 09:35 Las Vegas Harry Reid (LAS) 1 20:15 Fort Lauderdale (FLL) 1
WN 1821 2-stop Boeing 737-700 (Scimitar Winglets) 7:40 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 11:20 Santa Ana (SNA) 23:20 Baltimore (BWI)
WN 1821 2-stop Boeing 737-700 (Scimitar Winglets) 9:00 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 11:20 Santa Ana (SNA) 23:20 Baltimore (BWI)
WN 1821 2-stop Boeing 737-700 (Scimitar Winglets) 9:00 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 06:30 Seattle-Tacoma (SEA) 20:15 Fort Lauderdale (FLL) 1
WN 1821 3-stop Boeing 737-700 (Scimitar Winglets) 10:45 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 06:30 Seattle-Tacoma (SEA) 20:15 Fort Lauderdale (FLL) 1
WN 1821 3-stop Boeing 737-700 (Scimitar Winglets) 10:45 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 09:35 Las Vegas Harry Reid (LAS) 1 23:20 Baltimore (BWI)
WN 1821 3-stop Boeing 737-700 (Scimitar Winglets) 10:45 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 09:35 Las Vegas Harry Reid (LAS) 1 23:20 Baltimore (BWI)
WN 1821 3-stop Boeing 737-700 (Scimitar Winglets) 10:45 Effective 2026-02-20 through 2026-03-01
Mon,Thu,Fri 06:30 Seattle-Tacoma (SEA) 23:20 Baltimore (BWI)
WN 1821 4-stop Boeing 737-700 (Scimitar Winglets) 13:50 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 06:30 Seattle-Tacoma (SEA) 23:20 Baltimore (BWI)
WN 1821 4-stop Boeing 737-700 (Scimitar Winglets) 13:50 Effective 2026-02-20 through 2026-03-01
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Southwest Airlines flight WN 1821: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN1821
06:20
Seattle-Tacoma (SEA)

08:50
Las Vegas Harry Reid (LAS) 1
Effective 2026-01-11 through 2026-01-16
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
06:20
Seattle-Tacoma (SEA)

08:50
Las Vegas Harry Reid (LAS) 1
Effective 2026-01-19 through 2026-01-25
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
06:20
Seattle-Tacoma (SEA)

08:50
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-01 through 2026-02-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
06:20
Seattle-Tacoma (SEA)

08:50
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-09 through 2026-02-15
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
06:20
Seattle-Tacoma (SEA)

08:50
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-17 through 2026-02-23
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
06:20
Seattle-Tacoma (SEA)

08:50
Las Vegas Harry Reid (LAS) 1
Operates only on 2026-03-02
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

09:00
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

09:00
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
08:00
Nashville (BNA)

10:15
Los Angeles (LAX) 1
Effective 2026-06-09 through 2026-07-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:15, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN1821
08:40
San Diego (SAN) 1

11:15
Eugene (EUG)
Operates only on 2026-05-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
08:45
Seattle-Tacoma (SEA)

11:15
Las Vegas Harry Reid (LAS) 1
Effective 2026-01-06 through 2026-01-14
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
08:45
Seattle-Tacoma (SEA)

11:15
Las Vegas Harry Reid (LAS) 1
Effective 2026-01-18 through 2026-01-23
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
08:45
Seattle-Tacoma (SEA)

11:15
Las Vegas Harry Reid (LAS) 1
Effective 2026-01-26 through 2026-02-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
08:45
Seattle-Tacoma (SEA)

11:15
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-08 through 2026-02-11
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
08:45
Seattle-Tacoma (SEA)

11:15
Las Vegas Harry Reid (LAS) 1
Effective 2026-02-18 through 2026-03-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
08:55
San Diego (SAN) 1

11:30
Eugene (EUG)
Effective 2026-04-09 through 2026-06-01
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN1821
09:25
Seattle-Tacoma (SEA)

12:00
Las Vegas Harry Reid (LAS) 1
Effective 2026-01-10 through 2026-02-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
09:35
Las Vegas Harry Reid (LAS) 1

10:45
Santa Ana (SNA)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
09:35
Las Vegas Harry Reid (LAS) 1

10:45
Santa Ana (SNA)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:10, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
11:20
Santa Ana (SNA)

16:05
Austin (AUS)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
11:20
Santa Ana (SNA)

16:05
Austin (AUS)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
11:20
San Antonio (SAT) A

11:50
Phoenix Sky Harbor (PHX) 4
Effective 2026-04-07 through 2026-06-03
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN1821
12:20
San Diego (SAN) 1

14:55
Eugene (EUG)
Effective 2026-04-11 through 2026-05-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
12:30
San Diego (SAN) 1

14:05
San Jose (SJC) B
Valid until 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:35, non-stop
Boeing 737-700 (73W)
Direct Flights:
Southwest Airlines WN1821
12:35
San Diego (SAN) 1

15:10
Eugene (EUG)
Effective 2026-04-12 through 2026-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
12:35
San Diego (SAN) 1

15:10
Eugene (EUG)
Operates only on 2026-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
14:00
San Diego (SAN) 1

15:30
San Jose (SJC) B
Effective 2026-01-02 through 2026-01-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
14:30
San Diego (SAN) 1

16:00
San Jose (SJC) B
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN1821
14:40
Spokane (GEG)

16:30
Sacramento (SMF) B
Effective 2026-08-08 through 2026-09-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN1821
14:50
Albuquerque (ABQ)

15:30
Las Vegas Harry Reid (LAS) 1
Effective 2026-08-06 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
16:40
Austin (AUS)

20:15
Fort Lauderdale (FLL) 1
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
16:40
Austin (AUS)

20:15
Fort Lauderdale (FLL) 1
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
18:10
Luis Munoz Marin, San Juan (SJU) B

20:10
Fort Lauderdale (FLL) 1
Effective 2026-02-14 through 2026-02-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:00, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
18:45
Spokane (GEG)

20:35
Sacramento (SMF) B
Effective 2026-08-09 through 2026-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN1821
19:15
Portland (PDX)

21:00
San Jose (SJC) B
Effective 2026-03-05 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
20:50
Fort Lauderdale (FLL) 1

23:20
Baltimore (BWI)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
20:50
Fort Lauderdale (FLL) 1

23:20
Baltimore (BWI)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
21:15
San Jose (SJC) B

22:40
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
21:25
San Jose (SJC) B

22:50
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-07 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN1821
21:30
San Jose (SJC) B

22:55
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-10 through 2026-04-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN1821
21:35
San Jose (SJC) B

23:00
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-05 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

10:45
Santa Ana (SNA)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 4:15, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

10:45
Santa Ana (SNA)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 4:15, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
09:35
Las Vegas Harry Reid (LAS) 1

16:05
Austin (AUS)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 4:30, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
09:35
Las Vegas Harry Reid (LAS) 1

16:05
Austin (AUS)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 4:30, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
11:20
Santa Ana (SNA)

20:15
Fort Lauderdale (FLL) 1
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 5:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
11:20
Santa Ana (SNA)

20:15
Fort Lauderdale (FLL) 1
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 5:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
16:40
Austin (AUS)

23:20
Baltimore (BWI)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 5:40, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
16:40
Austin (AUS)

23:20
Baltimore (BWI)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 5:40, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
19:15
Portland (PDX)

23:00
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-05 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:45, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

16:05
Austin (AUS)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 7:35, 2-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

16:05
Austin (AUS)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 7:35, 2-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
09:35
Las Vegas Harry Reid (LAS) 1

20:15
Fort Lauderdale (FLL) 1
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 7:40, 2-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
09:35
Las Vegas Harry Reid (LAS) 1

20:15
Fort Lauderdale (FLL) 1
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 7:40, 2-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
11:20
Santa Ana (SNA)

23:20
Baltimore (BWI)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 9:00, 2-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
11:20
Santa Ana (SNA)

23:20
Baltimore (BWI)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 9:00, 2-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

20:15
Fort Lauderdale (FLL) 1
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 10:45, 3-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

20:15
Fort Lauderdale (FLL) 1
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 10:45, 3-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
09:35
Las Vegas Harry Reid (LAS) 1

23:20
Baltimore (BWI)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 10:45, 3-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
09:35
Las Vegas Harry Reid (LAS) 1

23:20
Baltimore (BWI)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 10:45, 3-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

23:20
Baltimore (BWI)
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 13:50, 4-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN1821
06:30
Seattle-Tacoma (SEA)

23:20
Baltimore (BWI)
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 13:50, 4-stop
Boeing 737-700 (Scimitar Winglets)
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This flight number is listed as serving the following routes:
  • Albuquerque (ABQ) - Las Vegas Harry Reid (LAS)
  • Austin (AUS) - Baltimore (BWI)
  • Austin (AUS) - Fort Lauderdale (FLL)
  • Fort Lauderdale (FLL) - Baltimore (BWI)
  • Las Vegas Harry Reid (LAS) - Austin (AUS)
  • Las Vegas Harry Reid (LAS) - Baltimore (BWI)
  • Las Vegas Harry Reid (LAS) - Fort Lauderdale (FLL)
  • Las Vegas Harry Reid (LAS) - Santa Ana (SNA)
  • Luis Munoz Marin, San Juan (SJU) - Fort Lauderdale (FLL)
  • Nashville (BNA) - Los Angeles (LAX)
  • Portland (PDX) - Las Vegas Harry Reid (LAS)
  • Portland (PDX) - San Jose (SJC)
  • San Antonio (SAT) - Phoenix Sky Harbor (PHX)
  • San Diego (SAN) - Eugene (EUG)
  • San Diego (SAN) - San Jose (SJC)
  • San Jose (SJC) - Las Vegas Harry Reid (LAS)
  • Santa Ana (SNA) - Austin (AUS)
  • Santa Ana (SNA) - Baltimore (BWI)
  • Santa Ana (SNA) - Fort Lauderdale (FLL)
  • Seattle-Tacoma (SEA) - Austin (AUS)
  • Seattle-Tacoma (SEA) - Baltimore (BWI)
  • Seattle-Tacoma (SEA) - Fort Lauderdale (FLL)
  • Seattle-Tacoma (SEA) - Las Vegas Harry Reid (LAS)
  • Seattle-Tacoma (SEA) - Santa Ana (SNA)
  • Spokane (GEG) - Sacramento (SMF)
All Southwest Airlines flights
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