United Airlines
flight
UA 631:
Multiple routes
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA631
Effective 2026-02-12 through 2026-02-19
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 1:14, non-stop
Airbus A319 (319)
Airbus A319 (319)
Direct Flights:
United Airlines UA631
Effective 2026-02-23 through 2026-03-02
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 1:14, non-stop
Airbus A319 (319)
Airbus A319 (319)
Direct Flights:
United Airlines UA631
Effective 2026-01-08 through 2026-02-09
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
Sun
Duration: 4:20, non-stop
Boeing 757-300 (753)
Boeing 757-300 (753)
Direct Flights:
United Airlines UA631
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:59, non-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Direct Flights:
United Airlines UA631
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:06, non-stop
Airbus A319 (319)
Airbus A319 (319)
Direct Flights:
United Airlines UA631
Effective 2026-04-30 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:59, non-stop
Airbus A319 (319)
Airbus A319 (319)
Direct Flights:
United Airlines UA631
Operates only on 2026-02-18
Mon
-
-
Tue
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-
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
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-
Duration: 3:07, non-stop
Boeing 737 MAX 9 (7M9)
Boeing 737 MAX 9 (7M9)
Direct Flights:
United Airlines UA631
Operates only on 2026-02-15
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 3:07, non-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Direct Flights:
United Airlines UA631
Effective 2026-03-05 through 2026-03-27
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
Duration: 3:06, non-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Direct Flights:
United Airlines UA631
Effective 2026-02-12 through 2026-02-21
Mon
Tue
Wed
-
-
Thu
Fri
Sat
Sun
-
-
Duration: 3:08, non-stop
Airbus A319 (319)
Airbus A319 (319)
Direct Flights:
United Airlines UA631
Effective 2026-02-22 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:08, non-stop
Airbus A319 (319)
Airbus A319 (319)
Direct Flights:
United Airlines UA631
Valid until 2026-01-05
Mon
Tue
Wed
-
-
Thu
Fri
Sat
-
-
Sun
Duration: 1:58, non-stop
Boeing 737-900 (739)
Boeing 737-900 (739)
Direct Flights:
United Airlines UA631
Valid until 2026-01-03
Mon
-
-
Tue
-
-
Wed
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 1:58, non-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Direct Flights:
United Airlines UA631
Effective 2026-01-06 through 2026-02-03
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:00, non-stop
Boeing 737-900 (739)
Boeing 737-900 (739)
Direct Flights:
United Airlines UA631
Effective 2026-01-08 through 2026-01-15
Mon
Tue
-
-
Wed
-
-
Thu
Fri
-
-
Sat
-
-
Sun
Duration: 2:00, non-stop
Boeing 737 MAX 9 (7M9)
Boeing 737 MAX 9 (7M9)
Direct Flights:
United Airlines UA631
Effective 2026-01-09 through 2026-01-10
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
Sat
Sun
-
-
Duration: 2:00, non-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Direct Flights:
United Airlines UA631
Effective 2026-01-16 through 2026-02-09
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
Duration: 2:00, non-stop
Boeing 737 MAX 9 (7M9)
Boeing 737 MAX 9 (7M9)
Direct Flights:
United Airlines UA631
Effective 2026-01-17 through 2026-02-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Duration: 2:00, non-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Direct Flights:
United Airlines UA631
Operates only on 2026-02-04
Mon
-
-
Tue
-
-
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:00, non-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Direct Flights:
United Airlines UA631
Effective 2026-02-10 through 2026-02-11
Mon
-
-
Tue
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 2:00, non-stop
Boeing 737-900 (739)
Boeing 737-900 (739)
Direct Flights:
United Airlines UA631
Effective 2026-02-12 through 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:04, non-stop
Boeing 737-900 (739)
Boeing 737-900 (739)
Direct Flights:
United Airlines UA631
Effective 2026-03-08 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:04, non-stop
Boeing 737-900 (739)
Boeing 737-900 (739)
Direct Flights:
United Airlines UA631
Effective 2026-03-29 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:03, non-stop
Boeing 737 MAX 8 (7M8)
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA631
Effective from 2026-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:00, non-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Direct Flights:
United Airlines UA631
Effective 2026-03-08 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:38, non-stop
Boeing 737-900 (739)
Boeing 737-900 (739)
Direct Flights:
United Airlines UA631
Effective 2026-03-05 through 2026-03-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
Sat
Sun
-
-
Duration: 2:35, non-stop
Boeing 737-900 (739)
Boeing 737-900 (739)
Direct Flights:
United Airlines UA631
Effective 2026-05-21 through 2026-08-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:37, non-stop
Airbus A320 (320)
The flight arrives 1 day after departure.
Airbus A320 (320)
The flight arrives 1 day after departure.
Non-Direct Flights:
United Airlines UA631
Effective 2026-02-12 through 2026-02-19
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 5:23, 1-stop
Airbus A319 (319)
Airbus A319 (319)
Non-Direct Flights:
United Airlines UA631
Effective 2026-02-23 through 2026-03-02
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 5:23, 1-stop
Airbus A319 (319)
Airbus A319 (319)
Non-Direct Flights:
United Airlines UA631
Effective 2026-01-08 through 2026-02-09
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
Sun
Duration: 7:25, 1-stop
Boeing 757-300 (753)
Boeing 757-300 (753)
Non-Direct Flights:
United Airlines UA631
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:25, 1-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA631
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:07, 1-stop
Airbus A319 (319)
Airbus A319 (319)
Non-Direct Flights:
United Airlines UA631
Effective 2026-04-30 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:06, 1-stop
Airbus A319 (319)
Airbus A319 (319)
Non-Direct Flights:
United Airlines UA631
Operates only on 2026-02-18
Mon
-
-
Tue
-
-
Wed
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 6:01, 1-stop
Boeing 737 MAX 9 (7M9)
Boeing 737 MAX 9 (7M9)
Non-Direct Flights:
United Airlines UA631
Operates only on 2026-02-15
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Duration: 5:59, 1-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA631
Effective 2026-03-05 through 2026-03-06
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 5:58, 1-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA631
Effective 2026-03-08 through 2026-03-27
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
Duration: 5:58, 1-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA631
Effective 2026-02-12 through 2026-02-21
Mon
Tue
Wed
-
-
Thu
Fri
Sat
Sun
-
-
Duration: 5:54, 1-stop
Airbus A319 (319)
Airbus A319 (319)
Non-Direct Flights:
United Airlines UA631
Effective 2026-02-22 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:54, 1-stop
Airbus A319 (319)
Airbus A319 (319)
Non-Direct Flights:
United Airlines UA631
Effective 2026-03-05 through 2026-03-07
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
Sat
Sun
-
-
Duration: 7:11, 1-stop
Boeing 737-900 (739)
Boeing 737-900 (739)
Non-Direct Flights:
United Airlines UA631
Effective 2026-03-08 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:12, 1-stop
Boeing 737-900 (739)
Boeing 737-900 (739)
Non-Direct Flights:
United Airlines UA631
Effective 2026-02-12 through 2026-02-19
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 8:09, 2-stop
Airbus A319 (319)
Airbus A319 (319)
Non-Direct Flights:
United Airlines UA631
Effective 2026-02-23 through 2026-03-02
Mon
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
-
-
Duration: 8:09, 2-stop
Airbus A319 (319)
Airbus A319 (319)
Non-Direct Flights:
United Airlines UA631
Effective 2026-03-05 through 2026-03-06
Mon
-
-
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
-
-
Duration: 11:05, 2-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA631
Effective 2026-03-08 through 2026-03-27
Mon
Tue
-
-
Wed
-
-
Thu
Fri
Sat
-
-
Sun
Duration: 10:06, 2-stop
Boeing 737-800 (738)
Boeing 737-800 (738)
This flight number is listed as serving the following routes:
- Denver (DEN) - Houston George Bush (IAH)
- Denver (DEN) - Phoenix Sky Harbor (PHX)
- New Orleans (MSY) - Denver (DEN)
- New Orleans (MSY) - Houston George Bush (IAH)
- New Orleans (MSY) - Phoenix Sky Harbor (PHX)
- Orlando (MCO) - Denver (DEN)
- Orlando (MCO) - Phoenix Sky Harbor (PHX)
- Phoenix Sky Harbor (PHX) - Houston George Bush (IAH)
- Vancouver (YVR) - Houston George Bush (IAH)