United Airlines flight UA 3640: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Sat 10:35 Chicago O'Hare (ORD) 2 13:19 Pittsburgh (PIT)
UA 3640 Non-stop Embraer EMB 175 (E7W) 1:44 Effective 2026-02-14 through 2026-02-28
Sat 13:18 Newark Liberty, New York (EWR) C 17:02 Key West (EYW)
UA 3640 Non-stop Embraer EMB 170 / EMB 175 (E70) 3:44 Valid until 2026-01-03
Mon-Fri,Sun 13:29 Newark Liberty, New York (EWR) C 17:13 Key West (EYW)
UA 3640 Non-stop Embraer EMB 170 / EMB 175 (E70) 3:44 Valid until 2026-01-05
Wed-Sun 17:35 Washington Dulles (IAD) 19:06 Rochester (ROC)
UA 3640 Non-stop Embraer EMB 175 (E7W) 1:31 Effective 2026-01-07 through 2026-02-01
Tue-Sun 17:35 Washington Dulles (IAD) 19:06 Rochester (ROC)
UA 3640 Non-stop Embraer EMB 175 (E7W) 1:31 Effective 2026-02-03 through 2026-02-08
Wed 17:35 Washington Dulles (IAD) 19:06 Rochester (ROC)
UA 3640 Non-stop Embraer EMB 175 (E7W) 1:31 Operates only on 2026-02-11
Mon-Fri,Sun 21:00 Toronto Pearson (YYZ) 1 22:04 Chicago O'Hare (ORD) 2
UA 3640 Non-stop Embraer EMB 175 (E7W) 2:04 Effective 2026-02-12 through 2026-03-05
Mon-Thu,Sun 21:00 Toronto Pearson (YYZ) 1 22:04 Chicago O'Hare (ORD) 2
UA 3640 Non-stop Embraer EMB 175 (E7W) 2:04 Effective 2026-03-08 through 2026-03-26
Daily 21:00 Toronto Pearson (YYZ) 1 21:59 Chicago O'Hare (ORD) 2
UA 3640 Non-stop Embraer EMB 175 (E7W) 1:59 Effective from 2026-04-30
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This flight number is listed as serving the following routes:


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United Airlines flight UA 3640: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA3640
10:35
Chicago O'Hare (ORD) 2

13:19
Pittsburgh (PIT)
Effective 2026-02-14 through 2026-02-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:44, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3640
13:18
Newark Liberty, New York (EWR) C

17:02
Key West (EYW)
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:44, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
United Airlines UA3640
13:29
Newark Liberty, New York (EWR) C

17:13
Key West (EYW)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 3:44, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Flights:
United Airlines UA3640
17:35
Washington Dulles (IAD)

19:06
Rochester (ROC)
Effective 2026-01-07 through 2026-02-01
Mon
-
Tue
-
Wed
Thu
Fri
Sat
Sun
Duration: 1:31, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3640
17:35
Washington Dulles (IAD)

19:06
Rochester (ROC)
Effective 2026-02-03 through 2026-02-08
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:31, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3640
17:35
Washington Dulles (IAD)

19:06
Rochester (ROC)
Operates only on 2026-02-11
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:31, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3640
21:00
Toronto Pearson (YYZ) 1

22:04
Chicago O'Hare (ORD) 2
Effective 2026-02-12 through 2026-03-05
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:04, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3640
21:00
Toronto Pearson (YYZ) 1

22:04
Chicago O'Hare (ORD) 2
Effective 2026-03-08 through 2026-03-26
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
Duration: 2:04, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA3640
21:00
Toronto Pearson (YYZ) 1

21:59
Chicago O'Hare (ORD) 2
Effective from 2026-04-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:59, non-stop
Embraer EMB 175 (E7W)
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This flight number is listed as serving the following routes:
  • Chicago O'Hare (ORD) - Pittsburgh (PIT)
  • Newark Liberty, New York (EWR) - Key West (EYW)
  • Toronto Pearson (YYZ) - Chicago O'Hare (ORD)
  • Washington Dulles (IAD) - Rochester (ROC)
All United Airlines flights
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