United Airlines flight UA 3631: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Tue,Sun 06:00 New York LaGuardia (LGA) B 07:30 Washington Dulles (IAD)
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:30 Effective 2026-01-06 through 2026-01-11
Sun 06:00 New York LaGuardia (LGA) B 07:30 Washington Dulles (IAD)
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:30 Effective 2026-01-18 through 2026-02-08
Mon-Thu,Sat 06:35 Cedar Rapids (CID) 08:05 Chicago O'Hare (ORD) 2
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:30 Effective 2026-01-07 through 2026-02-03
Tue-Thu 06:35 Cedar Rapids (CID) 08:05 Chicago O'Hare (ORD) 2
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:30 Effective 2026-02-05 through 2026-02-11
Mon,Thu-Sun 07:10 Chicago O'Hare (ORD) 2 10:39 Savannah (SAV)
UA 3631 Non-stop Embraer EMB 175 (E7W) 2:29 Effective 2026-03-05 through 2026-03-28
Daily 10:26 New York LaGuardia (LGA) B 11:55 Washington Dulles (IAD)
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:29 Valid until 2026-01-05
Mon-Fri,Sun 10:48 Richmond (RIC) 11:52 Washington Dulles (IAD)
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:04 Effective 2026-02-12 through 2026-03-04
Daily 14:00 Buffalo (BUF) 15:26 Newark Liberty, New York (EWR) C
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:26 Effective 2026-03-29 through 2026-05-20
Sat 16:00 Chicago O'Hare (ORD) 2 17:48 Omaha (OMA)
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:48 Effective 2026-02-14 through 2026-02-28
Daily 16:00 Buffalo (BUF) 17:26 Newark Liberty, New York (EWR) C
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:26 Effective from 2026-08-18
Sat 16:10 Portland (PWM) 18:18 Chicago O'Hare (ORD) 2
UA 3631 Non-stop Embraer EMB 175 (E7W) 3:08 Operates only on 2026-02-07
Daily 16:38 Buffalo (BUF) 18:07 Newark Liberty, New York (EWR) C
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:29 Effective 2026-05-21 through 2026-08-17
Fri 17:15 Washington Dulles (IAD) 18:54 Newark Liberty, New York (EWR) C
UA 3631 Non-stop Embraer EMB 175 (E7W) 1:39 Effective 2026-01-09 through 2026-02-06
This flight number is listed as serving the following routes:


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United Airlines flight UA 3631: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA3631
06:00
New York LaGuardia (LGA) B

07:30
Washington Dulles (IAD)
Effective 2026-01-06 through 2026-01-11
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:30, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
06:00
New York LaGuardia (LGA) B

07:30
Washington Dulles (IAD)
Effective 2026-01-18 through 2026-02-08
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:30, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
06:35
Cedar Rapids (CID)

08:05
Chicago O'Hare (ORD) 2
Effective 2026-01-07 through 2026-02-03
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
-
Duration: 1:30, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
06:35
Cedar Rapids (CID)

08:05
Chicago O'Hare (ORD) 2
Effective 2026-02-05 through 2026-02-11
Mon
-
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:30, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
07:10
Chicago O'Hare (ORD) 2

10:39
Savannah (SAV)
Effective 2026-03-05 through 2026-03-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 2:29, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
10:26
New York LaGuardia (LGA) B

11:55
Washington Dulles (IAD)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:29, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
10:48
Richmond (RIC)

11:52
Washington Dulles (IAD)
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:04, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
14:00
Buffalo (BUF)

15:26
Newark Liberty, New York (EWR) C
Effective 2026-03-29 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:26, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
16:00
Chicago O'Hare (ORD) 2

17:48
Omaha (OMA)
Effective 2026-02-14 through 2026-02-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:48, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
16:00
Buffalo (BUF)

17:26
Newark Liberty, New York (EWR) C
Effective from 2026-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:26, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
16:10
Portland (PWM)

18:18
Chicago O'Hare (ORD) 2
Operates only on 2026-02-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:08, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
16:38
Buffalo (BUF)

18:07
Newark Liberty, New York (EWR) C
Effective 2026-05-21 through 2026-08-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:29, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3631
17:15
Washington Dulles (IAD)

18:54
Newark Liberty, New York (EWR) C
Effective 2026-01-09 through 2026-02-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:39, non-stop
Embraer EMB 175 (E7W)
This flight number is listed as serving the following routes:
  • Buffalo (BUF) - Newark Liberty, New York (EWR)
  • Cedar Rapids (CID) - Chicago O'Hare (ORD)
  • Chicago O'Hare (ORD) - Omaha (OMA)
  • Chicago O'Hare (ORD) - Savannah (SAV)
  • New York LaGuardia (LGA) - Washington Dulles (IAD)
  • Portland (PWM) - Chicago O'Hare (ORD)
  • Richmond (RIC) - Washington Dulles (IAD)
  • Washington Dulles (IAD) - Newark Liberty, New York (EWR)
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