Delta Air Lines flight DL 3999: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 11:45 Seattle-Tacoma (SEA) 14:43 Santa Ana (SNA)
DL 3999 Non-stop Embraer EMB 175 (E7W) 2:58 Effective 2026-04-13 through 2026-10-05
Daily 11:45 Seattle-Tacoma (SEA) 14:40 Santa Ana (SNA)
DL 3999 Non-stop Embraer EMB 175 (E7W) 2:55 Effective from 2026-10-06
Daily 12:19 Detroit (DTW) M 13:22 Pittsburgh (PIT)
DL 3999 Non-stop Canadair CRJ 900 (CR9) 1:03 Effective 2026-03-08 through 2026-04-12
Mon-Fri,Sun 13:58 Minneapolis/Saint Paul (MSP) 1 16:59 Cleveland (CLE)
DL 3999 Non-stop Canadair CRJ 900 (CR9) 2:01 Effective 2026-02-01 through 2026-02-06
Mon-Wed 13:58 Minneapolis/Saint Paul (MSP) 1 16:59 Cleveland (CLE)
DL 3999 Non-stop Canadair CRJ 900 (CR9) 2:01 Effective 2026-02-09 through 2026-02-11
Daily 14:02 Pittsburgh (PIT) 15:15 Detroit (DTW) M
DL 3999 Non-stop Canadair CRJ 900 (CR9) 1:13 Effective 2026-03-08 through 2026-04-12
Mon,Tue 15:00 Salt Lake City (SLC) 16:10 San Jose (SJC) A
DL 3999 Non-stop Embraer EMB 175 (E7W) 2:10 Effective 2026-01-19 through 2026-01-20
Daily 15:45 Santa Ana (SNA) 18:46 Seattle-Tacoma (SEA)
DL 3999 Non-stop Embraer EMB 175 (E7W) 3:01 Effective 2026-04-13 through 2026-10-05
Daily 15:45 Santa Ana (SNA) 18:50 Seattle-Tacoma (SEA)
DL 3999 Non-stop Embraer EMB 175 (E7W) 3:05 Effective from 2026-10-06
Mon,Tue 16:59 San Jose (SJC) A 20:01 Salt Lake City (SLC)
DL 3999 Non-stop Embraer EMB 175 (E7W) 2:02 Effective 2026-01-19 through 2026-01-20
Mon-Fri,Sun 17:48 Cleveland (CLE) 19:12 Minneapolis/Saint Paul (MSP) 1
DL 3999 Non-stop Canadair CRJ 900 (CR9) 2:24 Effective 2026-02-01 through 2026-02-06
Mon-Wed 17:48 Cleveland (CLE) 19:12 Minneapolis/Saint Paul (MSP) 1
DL 3999 Non-stop Canadair CRJ 900 (CR9) 2:24 Effective 2026-02-09 through 2026-02-11
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This flight number is listed as serving the following routes:


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Delta Air Lines flight DL 3999: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL3999
11:45
Seattle-Tacoma (SEA)

14:43
Santa Ana (SNA)
Effective 2026-04-13 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:58, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3999
11:45
Seattle-Tacoma (SEA)

14:40
Santa Ana (SNA)
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:55, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3999
12:19
Detroit (DTW) M

13:22
Pittsburgh (PIT)
Effective 2026-03-08 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:03, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL3999
13:58
Minneapolis/Saint Paul (MSP) 1

16:59
Cleveland (CLE)
Effective 2026-02-01 through 2026-02-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:01, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL3999
13:58
Minneapolis/Saint Paul (MSP) 1

16:59
Cleveland (CLE)
Effective 2026-02-09 through 2026-02-11
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:01, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL3999
14:02
Pittsburgh (PIT)

15:15
Detroit (DTW) M
Effective 2026-03-08 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:13, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL3999
15:00
Salt Lake City (SLC)

16:10
San Jose (SJC) A
Effective 2026-01-19 through 2026-01-20
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:10, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3999
15:45
Santa Ana (SNA)

18:46
Seattle-Tacoma (SEA)
Effective 2026-04-13 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:01, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3999
15:45
Santa Ana (SNA)

18:50
Seattle-Tacoma (SEA)
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:05, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3999
16:59
San Jose (SJC) A

20:01
Salt Lake City (SLC)
Effective 2026-01-19 through 2026-01-20
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:02, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
Delta Air Lines DL3999
17:48
Cleveland (CLE)

19:12
Minneapolis/Saint Paul (MSP) 1
Effective 2026-02-01 through 2026-02-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:24, non-stop
Canadair CRJ 900 (CR9)
Direct Flights:
Delta Air Lines DL3999
17:48
Cleveland (CLE)

19:12
Minneapolis/Saint Paul (MSP) 1
Effective 2026-02-09 through 2026-02-11
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:24, non-stop
Canadair CRJ 900 (CR9)
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This flight number is listed as serving the following routes:
  • Detroit (DTW) - Pittsburgh (PIT)
  • Minneapolis/Saint Paul (MSP) - Cleveland (CLE)
  • Salt Lake City (SLC) - San Jose (SJC)
  • Santa Ana (SNA) - Seattle-Tacoma (SEA)
All Delta Air Lines flights
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