United Airlines flight UA 631: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 05:15 Chicago O'Hare (ORD) 1 08:15 George Bush, Houston (IAH) C
UA 631 Non-stop Boeing 757-300 (753) 3:00 Valid until 2025-05-11
Mon 05:15 Chicago O'Hare (ORD) 1 08:18 George Bush, Houston (IAH) C
UA 631 Non-stop Boeing 737-900 (739) 3:03 Effective 2025-05-12 through 2025-05-19
Tue-Sun 05:15 Chicago O'Hare (ORD) 1 08:15 George Bush, Houston (IAH) C
UA 631 Non-stop Boeing 757-300 (753) 3:00 Effective 2025-05-13 through 2025-05-21
Daily 06:45 Santa Ana (SNA) 08:20 San Francisco (SFO) 3
UA 631 Non-stop Boeing 737-800 (738) 1:35 Effective 2025-10-27 through 2025-12-01
Daily 07:00 Santa Ana (SNA) 08:43 San Francisco (SFO) 3
UA 631 Non-stop Boeing 737-800 (738) 1:43 Effective 2025-12-18 through 2026-01-05
Mon-Fri 07:20 Santa Ana (SNA) 08:53 San Francisco (SFO) 3
UA 631 Non-stop Boeing 737-800 (738) 1:33 Effective 2025-08-19 through 2025-09-26
Mon-Sat 07:20 Santa Ana (SNA) 08:53 San Francisco (SFO) 3
UA 631 Non-stop Boeing 737-800 (738) 1:33 Effective 2025-09-27 through 2025-10-25
Daily 07:25 Santa Ana (SNA) 08:56 San Francisco (SFO) 3
UA 631 Non-stop Boeing 737-800 (738) 1:31 Effective 2025-12-02 through 2025-12-17
Daily 07:25 Santa Ana (SNA) 09:00 San Francisco (SFO) 3
UA 631 Non-stop Boeing 737-800 (738) 1:35 Effective 2026-01-06 through 2026-02-11
Daily 07:30 Santa Ana (SNA) 09:00 San Francisco (SFO) 3
UA 631 Non-stop Airbus A320 (320) 1:30 Effective from 2026-02-12
Sun 07:45 Santa Ana (SNA) 09:18 San Francisco (SFO) 3
UA 631 Non-stop Boeing 737-800 (738) 1:33 Effective 2025-09-28 through 2025-10-19
Sun 07:50 Santa Ana (SNA) 09:23 San Francisco (SFO) 3
UA 631 Non-stop Boeing 737-800 (738) 1:33 Effective 2025-08-24 through 2025-09-21
Sun 08:00 Santa Ana (SNA) 09:31 San Francisco (SFO) 3
UA 631 Non-stop Boeing 737-800 (738) 1:31 Operates only on 2025-10-26
Sat,Sun 08:15 Dulles, Washington (IAD) 10:51 Bozeman (BZN)
UA 631 Non-stop Airbus A319 (319) 4:36 Effective 2025-06-28 through 2025-07-27
Sat 09:30 George Bush, Houston (IAH) C 11:29 Reno (RNO)
UA 631 Non-stop Airbus A320 (320) 3:59 Effective 2025-08-02 through 2025-08-16
Sun 09:30 George Bush, Houston (IAH) C 11:27 Reno (RNO)
UA 631 Non-stop Boeing 737-700 (73G) 3:57 Effective 2025-08-03 through 2025-08-17
Wed 11:53 Atlanta (ATL) N 14:15 Newark Liberty, New York (EWR) C
UA 631 Non-stop Airbus A319 (319) 2:22 Operates only on 2025-07-30
Thu 12:15 Atlanta (ATL) N 14:37 Newark Liberty, New York (EWR) C
UA 631 Non-stop Boeing 737-700 (73G) 2:22 Operates only on 2025-06-26
Mon-Fri 12:15 Atlanta (ATL) N 14:37 Newark Liberty, New York (EWR) C
UA 631 Non-stop Airbus A319 (319) 2:22 Effective 2025-06-27 through 2025-07-29
Mon-Fri 12:15 Atlanta (ATL) N 14:37 Newark Liberty, New York (EWR) C
UA 631 Non-stop Airbus A319 (319) 2:22 Effective 2025-07-31 through 2025-08-18
Thu 16:30 Cleveland Hopkins (CLE) 17:57 Denver (DEN)
UA 631 Non-stop Boeing 737 MAX 8 (7M8) 3:27 Operates only on 2025-05-22
Fri 16:30 Cleveland Hopkins (CLE) 17:58 Denver (DEN)
UA 631 Non-stop Boeing 737-900 (739) 3:28 Operates only on 2025-05-23
Daily 16:30 Cleveland Hopkins (CLE) 17:58 Denver (DEN)
UA 631 Non-stop Boeing 737-800 (738) 3:28 Effective 2025-05-24 through 2025-06-25
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This flight number is listed as serving the following routes:


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United Airlines flight UA 631: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA631
05:15
Chicago O'Hare (ORD) 1

08:15
George Bush, Houston (IAH) C
Valid until 2025-05-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:00, non-stop
Boeing 757-300 (753)
United Airlines UA631
05:15
Chicago O'Hare (ORD) 1

08:18
George Bush, Houston (IAH) C
Effective 2025-05-12 through 2025-05-19
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:03, non-stop
Boeing 737-900 (739)
United Airlines UA631
05:15
Chicago O'Hare (ORD) 1

08:15
George Bush, Houston (IAH) C
Effective 2025-05-13 through 2025-05-21
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:00, non-stop
Boeing 757-300 (753)
United Airlines UA631
06:45
Santa Ana (SNA)

08:20
San Francisco (SFO) 3
Effective 2025-10-27 through 2025-12-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:35, non-stop
Boeing 737-800 (738)
United Airlines UA631
07:00
Santa Ana (SNA)

08:43
San Francisco (SFO) 3
Effective 2025-12-18 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:43, non-stop
Boeing 737-800 (738)
United Airlines UA631
07:20
Santa Ana (SNA)

08:53
San Francisco (SFO) 3
Effective 2025-08-19 through 2025-09-26
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 1:33, non-stop
Boeing 737-800 (738)
United Airlines UA631
07:20
Santa Ana (SNA)

08:53
San Francisco (SFO) 3
Effective 2025-09-27 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 1:33, non-stop
Boeing 737-800 (738)
United Airlines UA631
07:25
Santa Ana (SNA)

08:56
San Francisco (SFO) 3
Effective 2025-12-02 through 2025-12-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:31, non-stop
Boeing 737-800 (738)
United Airlines UA631
07:25
Santa Ana (SNA)

09:00
San Francisco (SFO) 3
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:35, non-stop
Boeing 737-800 (738)
United Airlines UA631
07:30
Santa Ana (SNA)

09:00
San Francisco (SFO) 3
Effective from 2026-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:30, non-stop
Airbus A320 (320)
United Airlines UA631
07:45
Santa Ana (SNA)

09:18
San Francisco (SFO) 3
Effective 2025-09-28 through 2025-10-19
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:33, non-stop
Boeing 737-800 (738)
United Airlines UA631
07:50
Santa Ana (SNA)

09:23
San Francisco (SFO) 3
Effective 2025-08-24 through 2025-09-21
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:33, non-stop
Boeing 737-800 (738)
United Airlines UA631
08:00
Santa Ana (SNA)

09:31
San Francisco (SFO) 3
Operates only on 2025-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:31, non-stop
Boeing 737-800 (738)
United Airlines UA631
08:15
Dulles, Washington (IAD)

10:51
Bozeman (BZN)
Effective 2025-06-28 through 2025-07-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 4:36, non-stop
Airbus A319 (319)
United Airlines UA631
09:30
George Bush, Houston (IAH) C

11:29
Reno (RNO)
Effective 2025-08-02 through 2025-08-16
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:59, non-stop
Airbus A320 (320)
United Airlines UA631
09:30
George Bush, Houston (IAH) C

11:27
Reno (RNO)
Effective 2025-08-03 through 2025-08-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:57, non-stop
Boeing 737-700 (73G)
United Airlines UA631
11:53
Atlanta (ATL) N

14:15
Newark Liberty, New York (EWR) C
Operates only on 2025-07-30
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:22, non-stop
Airbus A319 (319)
United Airlines UA631
12:15
Atlanta (ATL) N

14:37
Newark Liberty, New York (EWR) C
Operates only on 2025-06-26
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:22, non-stop
Boeing 737-700 (73G)
United Airlines UA631
12:15
Atlanta (ATL) N

14:37
Newark Liberty, New York (EWR) C
Effective 2025-06-27 through 2025-07-29
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:22, non-stop
Airbus A319 (319)
United Airlines UA631
12:15
Atlanta (ATL) N

14:37
Newark Liberty, New York (EWR) C
Effective 2025-07-31 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:22, non-stop
Airbus A319 (319)
United Airlines UA631
16:30
Cleveland Hopkins (CLE)

17:57
Denver (DEN)
Operates only on 2025-05-22
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 3:27, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA631
16:30
Cleveland Hopkins (CLE)

17:58
Denver (DEN)
Operates only on 2025-05-23
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 3:28, non-stop
Boeing 737-900 (739)
United Airlines UA631
16:30
Cleveland Hopkins (CLE)

17:58
Denver (DEN)
Effective 2025-05-24 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:28, non-stop
Boeing 737-800 (738)
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This flight number is listed as serving the following routes:
  • Atlanta (ATL) - Newark Liberty, New York (EWR)
  • Chicago O'Hare (ORD) - George Bush, Houston (IAH)
  • Cleveland Hopkins (CLE) - Denver (DEN)
  • Dulles, Washington (IAD) - Bozeman (BZN)
  • George Bush, Houston (IAH) - Reno (RNO)
  • Santa Ana (SNA) - San Francisco (SFO)
All United Airlines flights
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