United Airlines flight UA 3634: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 06:07 Buffalo (BUF) 07:35 Washington Dulles (IAD)
UA 3634 Non-stop Embraer EMB 175 (E7W) 1:28 Effective 2026-02-12 through 2026-03-04
Mon,Sat,Sun 06:30 Moline (MLI) 07:44 Chicago O'Hare (ORD) 2
UA 3634 Non-stop Embraer EMB 175 (E7W) 1:14 Effective 2026-03-07 through 2026-03-28
Sat 07:55 Newark Liberty, New York (EWR) C 09:18 Boston Logan (BOS) B
UA 3634 Non-stop Embraer EMB 175 (E7W) 1:23 Valid until 2026-01-03
Sun 09:08 Chicago O'Hare (ORD) 2 11:56 Oklahoma City (OKC)
UA 3634 Non-stop Embraer EMB 175 (E7W) 2:48 Operates only on 2026-01-11
Sun 09:08 Chicago O'Hare (ORD) 2 11:56 Oklahoma City (OKC)
UA 3634 Non-stop Embraer EMB 175 (E7W) 2:48 Effective 2026-01-25 through 2026-02-01
Mon-Thu,Sat 09:15 Chicago O'Hare (ORD) 2 12:03 Oklahoma City (OKC)
UA 3634 Non-stop Embraer EMB 175 (E7W) 2:48 Effective 2026-01-06 through 2026-02-03
Mon-Thu 09:15 Chicago O'Hare (ORD) 2 12:03 Oklahoma City (OKC)
UA 3634 Non-stop Embraer EMB 175 (E7W) 2:48 Effective 2026-02-05 through 2026-02-11
Daily 12:52 Chicago O'Hare (ORD) 2 15:40 Toronto Pearson (YYZ) 1
UA 3634 Non-stop Embraer EMB 175 (E7W) 1:48 Effective 2026-04-30 through 2026-10-24
Daily 13:40 Chicago O'Hare (ORD) 2 16:28 Toronto Pearson (YYZ) 1
UA 3634 Non-stop Embraer EMB 175 (E7W) 1:48 Effective from 2026-10-25
Daily 15:00 Chicago O'Hare (ORD) 2 17:58 Toronto Pearson (YYZ) 1
UA 3634 Non-stop Embraer EMB 175 (E7W) 1:58 Effective 2026-03-29 through 2026-04-29
Mon-Wed,Fri,Sun 19:45 Charleston (CHS) 21:25 Washington Dulles (IAD)
UA 3634 Non-stop Embraer EMB 175 (E7W) 1:40 Valid until 2026-01-05
This flight number is listed as serving the following routes:


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United Airlines flight UA 3634: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA3634
06:07
Buffalo (BUF)

07:35
Washington Dulles (IAD)
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:28, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
06:30
Moline (MLI)

07:44
Chicago O'Hare (ORD) 2
Effective 2026-03-07 through 2026-03-28
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 1:14, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
07:55
Newark Liberty, New York (EWR) C

09:18
Boston Logan (BOS) B
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:23, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
09:08
Chicago O'Hare (ORD) 2

11:56
Oklahoma City (OKC)
Operates only on 2026-01-11
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:48, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
09:08
Chicago O'Hare (ORD) 2

11:56
Oklahoma City (OKC)
Effective 2026-01-25 through 2026-02-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:48, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
09:15
Chicago O'Hare (ORD) 2

12:03
Oklahoma City (OKC)
Effective 2026-01-06 through 2026-02-03
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
-
Duration: 2:48, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
09:15
Chicago O'Hare (ORD) 2

12:03
Oklahoma City (OKC)
Effective 2026-02-05 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:48, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
12:52
Chicago O'Hare (ORD) 2

15:40
Toronto Pearson (YYZ) 1
Effective 2026-04-30 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:48, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
13:40
Chicago O'Hare (ORD) 2

16:28
Toronto Pearson (YYZ) 1
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:48, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
15:00
Chicago O'Hare (ORD) 2

17:58
Toronto Pearson (YYZ) 1
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:58, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3634
19:45
Charleston (CHS)

21:25
Washington Dulles (IAD)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
-
Fri
Sat
-
Sun
Duration: 1:40, non-stop
Embraer EMB 175 (E7W)
This flight number is listed as serving the following routes:
  • Buffalo (BUF) - Washington Dulles (IAD)
  • Charleston (CHS) - Washington Dulles (IAD)
  • Chicago O'Hare (ORD) - Oklahoma City (OKC)
  • Chicago O'Hare (ORD) - Toronto Pearson (YYZ)
  • Moline (MLI) - Chicago O'Hare (ORD)
  • Newark Liberty, New York (EWR) - Boston Logan (BOS)
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