Air Canada
flight
AC 4631:
Multiple routes
FLIGHT SCHEDULE
Direct Codeshare Flights:
Air Canada AC4631
Effective from 2026-10-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 5401)
Duration: 2:29, non-stop Embraer EMB 175 (E7W)
Direct Codeshare Flights:
Air Canada AC4631
Effective 2026-08-18 through 2026-08-31
Mon
Tue
Wed
Thu
Fri
Sat
-
-
Sun
Codeshare flight, operated by United Airlines.
(UA 668)
Duration: 4:51, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air Canada AC4631
Effective 2026-09-06 through 2026-09-20
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
-
-
Sun
Codeshare flight, operated by United Airlines.
(UA 668)
Duration: 4:51, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air Canada AC4631
Effective 2026-03-08 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 668)
Duration: 5:10, non-stop Boeing 737 MAX 9 (7M9)
Direct Codeshare Flights:
Air Canada AC4631
Effective 2026-03-29 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 668)
Duration: 4:56, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air Canada AC4631
Effective 2026-05-21 through 2026-08-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 668)
Duration: 4:57, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air Canada AC4631
Effective 2026-08-22 through 2026-08-29
Mon
-
-
Tue
-
-
Wed
-
-
Thu
-
-
Fri
-
-
Sat
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 668)
Duration: 4:51, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air Canada AC4631
Effective 2026-09-01 through 2026-09-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
-
Codeshare flight, operated by United Airlines.
(UA 668)
Duration: 4:51, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air Canada AC4631
Effective 2026-09-27 through 2026-10-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 668)
Duration: 4:51, non-stop Boeing 737-900 (739)
Direct Codeshare Flights:
Air Canada AC4631
Valid until 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines.
(UA 668)
Duration: 5:10, non-stop Boeing 737 MAX 9 (7M9)
This flight number is listed as serving the following routes:
- Luis Munoz Marin, San Juan (SJU) - Houston George Bush (IAH)
- San Francisco (SFO) - Albuquerque (ABQ)