United Airlines flight UA 2123: Kansas City - San Francisco via San Jose

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 15:55 San Jose (SJC) A 19:31 Denver (DEN)
UA 2123 Non-stop Airbus A320 (320) 2:36 Effective 2026-02-12 through 2026-03-04
Daily 17:05 Kansas City (MCI) 18:18 Denver (DEN)
UA 2123 Non-stop Boeing 737-800 (738) 2:13 Effective from 2026-04-30
Tue 17:10 Kansas City (MCI) 18:21 Denver (DEN)
UA 2123 Non-stop Boeing 737 MAX 8 (7M8) 2:11 Operates only on 2026-01-06
Mon-Thu,Sat,Sun 17:10 Kansas City (MCI) 18:21 Denver (DEN)
UA 2123 Non-stop Boeing 737-800 (738) 2:11 Effective 2026-01-07 through 2026-01-15
Daily 17:10 Kansas City (MCI) 18:21 Denver (DEN)
UA 2123 Non-stop Boeing 737-800 (738) 2:11 Effective 2026-01-16 through 2026-02-11
Fri 17:14 Kansas City (MCI) 18:25 Denver (DEN)
UA 2123 Non-stop Boeing 737-900 (739) 2:11 Operates only on 2026-01-09
Daily 17:18 Kansas City (MCI) 18:24 Denver (DEN)
UA 2123 Non-stop Boeing 737-900 (739) 2:06 Effective 2026-03-29 through 2026-04-29
Daily 17:21 Kansas City (MCI) 18:25 Denver (DEN)
UA 2123 Non-stop Boeing 737-800 (738) 2:04 Effective 2026-03-05 through 2026-03-28
Wed-Sun 20:51 Denver (DEN) 22:47 San Francisco (SFO) 3
UA 2123 Non-stop Airbus A321neo (32Q) 2:56 Effective 2026-03-05 through 2026-03-28
Mon,Tue 20:51 Denver (DEN) 22:47 San Francisco (SFO) 3
UA 2123 Non-stop Boeing 757-200 (752) 2:56 Effective 2026-03-09 through 2026-03-24
Daily 20:51 Denver (DEN) 22:43 San Francisco (SFO) 3
UA 2123 Non-stop Boeing 737 MAX 8 (7M8) 2:52 Effective from 2026-03-29
Tue 21:05 Denver (DEN) 22:57 San Francisco (SFO) 3
UA 2123 Non-stop Boeing 787-9 (789) 2:52 Operates only on 2026-01-06
Daily 21:05 Denver (DEN) 22:58 San Francisco (SFO) 3
UA 2123 Non-stop Boeing 737-900 (739) 2:53 Effective 2026-01-07 through 2026-01-26
Mon,Wed-Sun 21:05 Denver (DEN) 22:58 San Francisco (SFO) 3
UA 2123 Non-stop Boeing 737-900 (739) 2:53 Effective 2026-01-28 through 2026-02-11
Mon-Fri,Sun 21:11 Denver (DEN) 23:05 San Francisco (SFO) 3
UA 2123 Non-stop Airbus A321neo (32Q) 2:54 Valid until 2026-01-05
Sat 21:11 Denver (DEN) 23:05 San Francisco (SFO) 3
UA 2123 Non-stop Boeing 737-900 (739) 2:54 Operates only on 2026-01-03
Daily 21:20 Denver (DEN) 23:17 San Francisco (SFO) 3
UA 2123 Non-stop Boeing 757-300 (753) 2:57 Effective 2026-02-12 through 2026-03-04
Non-Direct Flights:
Daily 15:55 San Jose (SJC) A 23:17 San Francisco (SFO) 3
UA 2123 1-stop Airbus A320 (320) 7:22 Effective 2026-02-12 through 2026-03-04
Daily 17:05 Kansas City (MCI) 22:43 San Francisco (SFO) 3
UA 2123 1-stop Boeing 737-800 (738) 7:38 Effective from 2026-04-30
Tue 17:10 Kansas City (MCI) 22:57 San Francisco (SFO) 3
UA 2123 1-stop Boeing 737 MAX 8 (7M8) 7:47 Operates only on 2026-01-06
Mon-Thu,Sat,Sun 17:10 Kansas City (MCI) 22:58 San Francisco (SFO) 3
UA 2123 1-stop Boeing 737-800 (738) 7:48 Effective 2026-01-07 through 2026-01-15
Daily 17:10 Kansas City (MCI) 22:58 San Francisco (SFO) 3
UA 2123 1-stop Boeing 737-800 (738) 7:48 Effective 2026-01-16 through 2026-01-26
Mon,Wed-Sun 17:10 Kansas City (MCI) 22:58 San Francisco (SFO) 3
UA 2123 1-stop Boeing 737-800 (738) 7:48 Effective 2026-01-28 through 2026-02-11
Fri 17:14 Kansas City (MCI) 22:58 San Francisco (SFO) 3
UA 2123 1-stop Boeing 737-900 (739) 7:44 Operates only on 2026-01-09
Daily 17:18 Kansas City (MCI) 22:43 San Francisco (SFO) 3
UA 2123 1-stop Boeing 737-900 (739) 7:25 Effective 2026-03-29 through 2026-04-29
Daily 17:21 Kansas City (MCI) 22:47 San Francisco (SFO) 3
UA 2123 1-stop Boeing 737-800 (738) 7:26 Effective 2026-03-05 through 2026-03-28
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Parallax here MCI-SFO


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United Airlines flight UA 2123:
Kansas City - San Francisco via San Jose
Ad mobi flat here (320x100px) 6074960173 M FlightWNum Top Flat
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA2123
15:55
San Jose (SJC) A

19:31
Denver (DEN)
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:36, non-stop
Airbus A320 (320)
Direct Flights:
United Airlines UA2123
17:05
Kansas City (MCI)

18:18
Denver (DEN)
Effective from 2026-04-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:13, non-stop
Boeing 737-800 (738)
Direct Flights:
United Airlines UA2123
17:10
Kansas City (MCI)

18:21
Denver (DEN)
Operates only on 2026-01-06
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:11, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA2123
17:10
Kansas City (MCI)

18:21
Denver (DEN)
Effective 2026-01-07 through 2026-01-15
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
Duration: 2:11, non-stop
Boeing 737-800 (738)
Direct Flights:
United Airlines UA2123
17:10
Kansas City (MCI)

18:21
Denver (DEN)
Effective 2026-01-16 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:11, non-stop
Boeing 737-800 (738)
Direct Flights:
United Airlines UA2123
17:14
Kansas City (MCI)

18:25
Denver (DEN)
Operates only on 2026-01-09
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:11, non-stop
Boeing 737-900 (739)
Direct Flights:
United Airlines UA2123
17:18
Kansas City (MCI)

18:24
Denver (DEN)
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:06, non-stop
Boeing 737-900 (739)
Direct Flights:
United Airlines UA2123
17:21
Kansas City (MCI)

18:25
Denver (DEN)
Effective 2026-03-05 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:04, non-stop
Boeing 737-800 (738)
Direct Flights:
United Airlines UA2123
20:51
Denver (DEN)

22:47
San Francisco (SFO) 3
Effective 2026-03-05 through 2026-03-28
Mon
-
Tue
-
Wed
Thu
Fri
Sat
Sun
Duration: 2:56, non-stop
Airbus A321neo (32Q)
Direct Flights:
United Airlines UA2123
20:51
Denver (DEN)

22:47
San Francisco (SFO) 3
Effective 2026-03-09 through 2026-03-24
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:56, non-stop
Boeing 757-200 (752)
Direct Flights:
United Airlines UA2123
20:51
Denver (DEN)

22:43
San Francisco (SFO) 3
Effective from 2026-03-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:52, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA2123
21:05
Denver (DEN)

22:57
San Francisco (SFO) 3
Operates only on 2026-01-06
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:52, non-stop
Boeing 787-9 (789)
Direct Flights:
United Airlines UA2123
21:05
Denver (DEN)

22:58
San Francisco (SFO) 3
Effective 2026-01-07 through 2026-01-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:53, non-stop
Boeing 737-900 (739)
Direct Flights:
United Airlines UA2123
21:05
Denver (DEN)

22:58
San Francisco (SFO) 3
Effective 2026-01-28 through 2026-02-11
Mon
Tue
-
Wed
Thu
Fri
Sat
Sun
Duration: 2:53, non-stop
Boeing 737-900 (739)
Direct Flights:
United Airlines UA2123
21:11
Denver (DEN)

23:05
San Francisco (SFO) 3
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:54, non-stop
Airbus A321neo (32Q)
Direct Flights:
United Airlines UA2123
21:11
Denver (DEN)

23:05
San Francisco (SFO) 3
Operates only on 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:54, non-stop
Boeing 737-900 (739)
Direct Flights:
United Airlines UA2123
21:20
Denver (DEN)

23:17
San Francisco (SFO) 3
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:57, non-stop
Boeing 757-300 (753)
Non-Direct Flights:
United Airlines UA2123
15:55
San Jose (SJC) A

23:17
San Francisco (SFO) 3
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:22, 1-stop
Airbus A320 (320)
Non-Direct Flights:
United Airlines UA2123
17:05
Kansas City (MCI)

22:43
San Francisco (SFO) 3
Effective from 2026-04-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:38, 1-stop
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA2123
17:10
Kansas City (MCI)

22:57
San Francisco (SFO) 3
Operates only on 2026-01-06
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 7:47, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
United Airlines UA2123
17:10
Kansas City (MCI)

22:58
San Francisco (SFO) 3
Effective 2026-01-07 through 2026-01-15
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
Duration: 7:48, 1-stop
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA2123
17:10
Kansas City (MCI)

22:58
San Francisco (SFO) 3
Effective 2026-01-16 through 2026-01-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:48, 1-stop
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA2123
17:10
Kansas City (MCI)

22:58
San Francisco (SFO) 3
Effective 2026-01-28 through 2026-02-11
Mon
Tue
-
Wed
Thu
Fri
Sat
Sun
Duration: 7:48, 1-stop
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA2123
17:14
Kansas City (MCI)

22:58
San Francisco (SFO) 3
Operates only on 2026-01-09
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 7:44, 1-stop
Boeing 737-900 (739)
Non-Direct Flights:
United Airlines UA2123
17:18
Kansas City (MCI)

22:43
San Francisco (SFO) 3
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:25, 1-stop
Boeing 737-900 (739)
Non-Direct Flights:
United Airlines UA2123
17:21
Kansas City (MCI)

22:47
San Francisco (SFO) 3
Effective 2026-03-05 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:26, 1-stop
Boeing 737-800 (738)
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Parallax here MCI-SFO
  • UA 2123 is a domestic flight departing from the Kansas City airport (MCI) and arriving at San Francisco airport (SFO).
  • The flight runs via San Jose (SJC).
  • The flight distance is 1493 miles, or 2403 km.
  • The timezone of the departure airport is UTC-6 , and the timezone of the arrival airport is UTC-8 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
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