United Airlines flight UA 421: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon-Fri 09:30 Ronald Reagan, Washington (DCA) 2 10:47 O'Hare, Chicago (ORD) 1
UA 421 Non-stop Boeing 737-800 (738) 2:17 Effective 2024-01-09 through 2024-01-19
Mon-Fri,Sun 09:30 Ronald Reagan, Washington (DCA) 2 10:47 O'Hare, Chicago (ORD) 1
UA 421 Non-stop Boeing 737-800 (738) 2:17 Effective 2024-01-21 through 2024-02-14
Daily 12:55 Sacramento (SMF) A 16:14 Denver (DEN)
UA 421 Non-stop Boeing 737-900 (739) 2:19 Effective from 2024-05-23
Daily 12:57 Sacramento (SMF) A 16:21 Denver (DEN)
UA 421 Non-stop Boeing 737-800 (738) 2:24 Effective 2024-03-07 through 2024-03-30
Daily 13:03 Sacramento (SMF) A 16:27 Denver (DEN)
UA 421 Non-stop Boeing 737-900 (739) 2:24 Effective 2024-03-31 through 2024-05-22
Sat 15:10 Edward L. Logan, Boston (BOS) B 18:52 George Bush, Houston (IAH) C
UA 421 Non-stop Airbus A319 (319) 4:42 Valid until 2024-01-06
Mon,Wed-Fri 15:10 Edward L. Logan, Boston (BOS) B 18:52 George Bush, Houston (IAH) C
UA 421 Non-stop Boeing 737-700 (73G) 4:42 Valid until 2024-01-01
Tue-Fri 15:10 Edward L. Logan, Boston (BOS) B 18:52 George Bush, Houston (IAH) C
UA 421 Non-stop Boeing 737-700 (73G) 4:42 Effective 2024-01-02 through 2024-01-05
Mon,Sun 15:10 Edward L. Logan, Boston (BOS) B 18:52 George Bush, Houston (IAH) C
UA 421 Non-stop Airbus A320 (320) 4:42 Effective 2024-01-07 through 2024-01-08
Daily 17:25 Denver (DEN) 20:48 Milwaukee (MKE)
UA 421 Non-stop Airbus A320 (320) 2:23 Effective 2024-05-23 through 2024-09-25
Daily 17:25 Denver (DEN) 20:48 Milwaukee (MKE)
UA 421 Non-stop Airbus A320 (320) 2:23 Effective from 2024-10-27
Mon,Thu-Sat 17:30 Denver (DEN) 20:48 Milwaukee (MKE)
UA 421 Non-stop Airbus A319 (319) 2:18 Effective 2024-02-15 through 2024-03-04
Wed 17:35 Denver (DEN) 20:52 Milwaukee (MKE)
UA 421 Non-stop Boeing 737-800 (738) 2:17 Effective 2024-03-13 through 2024-03-27
Tue,Sun 17:37 Denver (DEN) 20:54 Milwaukee (MKE)
UA 421 Non-stop Boeing 737-800 (738) 2:17 Effective 2024-03-10 through 2024-03-26
Mon,Thu,Fri 17:45 Denver (DEN) 21:08 Milwaukee (MKE)
UA 421 Non-stop Boeing 737-800 (738) 2:23 Effective 2024-03-07 through 2024-03-29
Sat 17:50 Denver (DEN) 21:13 Milwaukee (MKE)
UA 421 Non-stop Boeing 737-800 (738) 2:23 Effective 2024-03-09 through 2024-03-30
Daily 17:55 Denver (DEN) 21:15 Milwaukee (MKE)
UA 421 Non-stop Airbus A319 (319) 2:20 Effective 2024-03-31 through 2024-05-22
Daily 18:05 Denver (DEN) 21:38 Milwaukee (MKE)
UA 421 Non-stop Airbus A320 (320) 2:33 Effective 2024-09-26 through 2024-10-26
Non-Direct Flights:
Daily 12:55 Sacramento (SMF) A 20:48 Milwaukee (MKE)
UA 421 1-stop Boeing 737-900 (739) 5:53 Effective 2024-05-23 through 2024-09-25
Daily 12:55 Sacramento (SMF) A 21:38 Milwaukee (MKE)
UA 421 1-stop Boeing 737-900 (739) 6:43 Effective 2024-09-26 through 2024-10-26
Daily 12:55 Sacramento (SMF) A 20:48 Milwaukee (MKE)
UA 421 1-stop Boeing 737-900 (739) 5:53 Effective from 2024-10-27
Mon,Thu,Fri 12:57 Sacramento (SMF) A 21:08 Milwaukee (MKE)
UA 421 1-stop Boeing 737-800 (738) 6:11 Effective 2024-03-07 through 2024-03-29
Sat 12:57 Sacramento (SMF) A 21:13 Milwaukee (MKE)
UA 421 1-stop Boeing 737-800 (738) 6:16 Effective 2024-03-09 through 2024-03-30
Tue,Sun 12:57 Sacramento (SMF) A 20:54 Milwaukee (MKE)
UA 421 1-stop Boeing 737-800 (738) 5:57 Effective 2024-03-10 through 2024-03-26
Wed 12:57 Sacramento (SMF) A 20:52 Milwaukee (MKE)
UA 421 1-stop Boeing 737-800 (738) 5:55 Effective 2024-03-13 through 2024-03-27
Daily 13:03 Sacramento (SMF) A 21:15 Milwaukee (MKE)
UA 421 1-stop Boeing 737-900 (739) 6:12 Effective 2024-03-31 through 2024-05-22
This flight number is listed as serving the following routes:


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United Airlines flight UA 421: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA421
09:30
Ronald Reagan, Washington (DCA) 2

10:47
O'Hare, Chicago (ORD) 1
Effective 2024-01-09 through 2024-01-19
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:17, non-stop
Boeing 737-800 (738)
United Airlines UA421
09:30
Ronald Reagan, Washington (DCA) 2

10:47
O'Hare, Chicago (ORD) 1
Effective 2024-01-21 through 2024-02-14
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:17, non-stop
Boeing 737-800 (738)
United Airlines UA421
12:55
Sacramento (SMF) A

16:14
Denver (DEN)
Effective from 2024-05-23
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:19, non-stop
Boeing 737-900 (739)
United Airlines UA421
12:57
Sacramento (SMF) A

16:21
Denver (DEN)
Effective 2024-03-07 through 2024-03-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:24, non-stop
Boeing 737-800 (738)
United Airlines UA421
13:03
Sacramento (SMF) A

16:27
Denver (DEN)
Effective 2024-03-31 through 2024-05-22
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:24, non-stop
Boeing 737-900 (739)
United Airlines UA421
15:10
Edward L. Logan, Boston (BOS) B

18:52
George Bush, Houston (IAH) C
Valid until 2024-01-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:42, non-stop
Airbus A319 (319)
United Airlines UA421
15:10
Edward L. Logan, Boston (BOS) B

18:52
George Bush, Houston (IAH) C
Valid until 2024-01-01
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 4:42, non-stop
Boeing 737-700 (73G)
United Airlines UA421
15:10
Edward L. Logan, Boston (BOS) B

18:52
George Bush, Houston (IAH) C
Effective 2024-01-02 through 2024-01-05
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 4:42, non-stop
Boeing 737-700 (73G)
United Airlines UA421
15:10
Edward L. Logan, Boston (BOS) B

18:52
George Bush, Houston (IAH) C
Effective 2024-01-07 through 2024-01-08
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:42, non-stop
Airbus A320 (320)
United Airlines UA421
17:25
Denver (DEN)

20:48
Milwaukee (MKE)
Effective 2024-05-23 through 2024-09-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:23, non-stop
Airbus A320 (320)
United Airlines UA421
17:25
Denver (DEN)

20:48
Milwaukee (MKE)
Effective from 2024-10-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:23, non-stop
Airbus A320 (320)
United Airlines UA421
17:30
Denver (DEN)

20:48
Milwaukee (MKE)
Effective 2024-02-15 through 2024-03-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
-
Duration: 2:18, non-stop
Airbus A319 (319)
United Airlines UA421
17:35
Denver (DEN)

20:52
Milwaukee (MKE)
Effective 2024-03-13 through 2024-03-27
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:17, non-stop
Boeing 737-800 (738)
United Airlines UA421
17:37
Denver (DEN)

20:54
Milwaukee (MKE)
Effective 2024-03-10 through 2024-03-26
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:17, non-stop
Boeing 737-800 (738)
United Airlines UA421
17:45
Denver (DEN)

21:08
Milwaukee (MKE)
Effective 2024-03-07 through 2024-03-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:23, non-stop
Boeing 737-800 (738)
United Airlines UA421
17:50
Denver (DEN)

21:13
Milwaukee (MKE)
Effective 2024-03-09 through 2024-03-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:23, non-stop
Boeing 737-800 (738)
United Airlines UA421
17:55
Denver (DEN)

21:15
Milwaukee (MKE)
Effective 2024-03-31 through 2024-05-22
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:20, non-stop
Airbus A319 (319)
United Airlines UA421
18:05
Denver (DEN)

21:38
Milwaukee (MKE)
Effective 2024-09-26 through 2024-10-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:33, non-stop
Airbus A320 (320)
Non-Direct Flights:
United Airlines UA421
12:55
Sacramento (SMF) A

20:48
Milwaukee (MKE)
Effective 2024-05-23 through 2024-09-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:53, 1-stop
Boeing 737-900 (739)
United Airlines UA421
12:55
Sacramento (SMF) A

21:38
Milwaukee (MKE)
Effective 2024-09-26 through 2024-10-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:43, 1-stop
Boeing 737-900 (739)
United Airlines UA421
12:55
Sacramento (SMF) A

20:48
Milwaukee (MKE)
Effective from 2024-10-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:53, 1-stop
Boeing 737-900 (739)
United Airlines UA421
12:57
Sacramento (SMF) A

21:08
Milwaukee (MKE)
Effective 2024-03-07 through 2024-03-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 6:11, 1-stop
Boeing 737-800 (738)
United Airlines UA421
12:57
Sacramento (SMF) A

21:13
Milwaukee (MKE)
Effective 2024-03-09 through 2024-03-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 6:16, 1-stop
Boeing 737-800 (738)
United Airlines UA421
12:57
Sacramento (SMF) A

20:54
Milwaukee (MKE)
Effective 2024-03-10 through 2024-03-26
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:57, 1-stop
Boeing 737-800 (738)
United Airlines UA421
12:57
Sacramento (SMF) A

20:52
Milwaukee (MKE)
Effective 2024-03-13 through 2024-03-27
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:55, 1-stop
Boeing 737-800 (738)
United Airlines UA421
13:03
Sacramento (SMF) A

21:15
Milwaukee (MKE)
Effective 2024-03-31 through 2024-05-22
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:12, 1-stop
Boeing 737-900 (739)
This flight number is listed as serving the following routes:
  • Denver (DEN) - Milwaukee (MKE)
  • Edward L. Logan, Boston (BOS) - George Bush, Houston (IAH)
  • Ronald Reagan, Washington (DCA) - O'Hare, Chicago (ORD)
  • Sacramento (SMF) - Denver (DEN)
  • Sacramento (SMF) - Milwaukee (MKE)
All United Airlines flights
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