United Airlines flight UA 3666: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sun 14:25 Chicago O'Hare (ORD) 2 17:37 Baltimore (BWI)
UA 3666 Non-stop Embraer EMB 175 (E7W) 2:12 Effective 2025-06-01 through 2025-06-15
Sat 20:59 Newark Liberty, New York (EWR) C 23:13 Greenville/Spartanburg (GSP)
UA 3666 Non-stop Embraer EMB 175 (E7W) 2:14 Effective 2025-06-28 through 2025-08-16
Wed-Fri,Sun 21:29 Newark Liberty, New York (EWR) C 23:43 Greenville/Spartanburg (GSP)
UA 3666 Non-stop Embraer EMB 175 (E7W) 2:14 Effective 2025-06-26 through 2025-07-02
Tue,Wed,Fri,Sun 21:29 Newark Liberty, New York (EWR) C 23:43 Greenville/Spartanburg (GSP)
UA 3666 Non-stop Embraer EMB 175 (E7W) 2:14 Effective 2025-07-04 through 2025-08-03
Mon-Wed,Fri,Sun 21:29 Newark Liberty, New York (EWR) C 23:43 Greenville/Spartanburg (GSP)
UA 3666 Non-stop Embraer EMB 175 (E7W) 2:14 Effective 2025-08-04 through 2025-08-18
Mon,Tue,Thu 21:30 Newark Liberty, New York (EWR) C 23:44 Greenville/Spartanburg (GSP)
UA 3666 Non-stop Embraer EMB 175 (E7W) 2:14 Effective 2025-06-30 through 2025-07-07
Mon,Thu 21:30 Newark Liberty, New York (EWR) C 23:44 Greenville/Spartanburg (GSP)
UA 3666 Non-stop Embraer EMB 175 (E7W) 2:14 Effective 2025-07-10 through 2025-07-31
Thu 21:30 Newark Liberty, New York (EWR) C 23:44 Greenville/Spartanburg (GSP)
UA 3666 Non-stop Embraer EMB 175 (E7W) 2:14 Effective 2025-08-07 through 2025-08-14
Daily 21:40 Newark Liberty, New York (EWR) C 23:11 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 175 (E7W) 1:31 Effective 2025-09-25 through 2025-10-25
Sat 21:55 Newark Liberty, New York (EWR) C 23:20 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 175 (E7W) 1:25 Effective 2025-05-03 through 2025-05-17
Daily 21:59 Newark Liberty, New York (EWR) C 23:21 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:22 Effective from 2025-10-26
Mon-Wed,Fri 22:29 Newark Liberty, New York (EWR) C 23:54 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 175 (E7W) 1:25 Effective 2025-05-02 through 2025-05-09
Thu 22:29 Newark Liberty, New York (EWR) C 23:54 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:25 Operates only on 2025-05-08
Mon-Fri,Sun 22:29 Newark Liberty, New York (EWR) C 23:54 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 175 (E7W) 1:25 Effective 2025-05-11 through 2025-05-21
Tue,Wed,Fri 22:35 Newark Liberty, New York (EWR) C 23:58 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 175 (E7W) 1:23 Effective 2025-05-23 through 2025-05-30
Mon 22:35 Newark Liberty, New York (EWR) C 23:58 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:23 Operates only on 2025-05-26
Mon-Wed,Fri 22:35 Newark Liberty, New York (EWR) C 23:58 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 175 (E7W) 1:23 Effective 2025-06-02 through 2025-06-18
Daily 22:35 Newark Liberty, New York (EWR) C 23:58 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 175 (E7W) 1:23 Effective 2025-06-19 through 2025-06-25
Sat 23:00 Newark Liberty, New York (EWR) C 00:23 Syracuse (SYR)
UA 3666 Non-stop Embraer EMB 175 (E7W) 1:23 Effective 2025-05-24 through 2025-06-14
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:


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United Airlines flight UA 3666: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA3666
14:25
Chicago O'Hare (ORD) 2

17:37
Baltimore (BWI)
Effective 2025-06-01 through 2025-06-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:12, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
20:59
Newark Liberty, New York (EWR) C

23:13
Greenville/Spartanburg (GSP)
Effective 2025-06-28 through 2025-08-16
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:14, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
21:29
Newark Liberty, New York (EWR) C

23:43
Greenville/Spartanburg (GSP)
Effective 2025-06-26 through 2025-07-02
Mon
-
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:14, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
21:29
Newark Liberty, New York (EWR) C

23:43
Greenville/Spartanburg (GSP)
Effective 2025-07-04 through 2025-08-03
Mon
-
Tue
Wed
Thu
-
Fri
Sat
-
Sun
Duration: 2:14, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
21:29
Newark Liberty, New York (EWR) C

23:43
Greenville/Spartanburg (GSP)
Effective 2025-08-04 through 2025-08-18
Mon
Tue
Wed
Thu
-
Fri
Sat
-
Sun
Duration: 2:14, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
21:30
Newark Liberty, New York (EWR) C

23:44
Greenville/Spartanburg (GSP)
Effective 2025-06-30 through 2025-07-07
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:14, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
21:30
Newark Liberty, New York (EWR) C

23:44
Greenville/Spartanburg (GSP)
Effective 2025-07-10 through 2025-07-31
Mon
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:14, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
21:30
Newark Liberty, New York (EWR) C

23:44
Greenville/Spartanburg (GSP)
Effective 2025-08-07 through 2025-08-14
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:14, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
21:40
Newark Liberty, New York (EWR) C

23:11
Syracuse (SYR)
Effective 2025-09-25 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:31, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
21:55
Newark Liberty, New York (EWR) C

23:20
Syracuse (SYR)
Effective 2025-05-03 through 2025-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:25, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
21:59
Newark Liberty, New York (EWR) C

23:21
Syracuse (SYR)
Effective from 2025-10-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:22, non-stop
Embraer EMB 170 / EMB 175 (E70)
United Airlines UA3666
22:29
Newark Liberty, New York (EWR) C

23:54
Syracuse (SYR)
Effective 2025-05-02 through 2025-05-09
Mon
Tue
Wed
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:25, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
22:29
Newark Liberty, New York (EWR) C

23:54
Syracuse (SYR)
Operates only on 2025-05-08
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Embraer EMB 170 / EMB 175 (E70)
United Airlines UA3666
22:29
Newark Liberty, New York (EWR) C

23:54
Syracuse (SYR)
Effective 2025-05-11 through 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:25, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
22:35
Newark Liberty, New York (EWR) C

23:58
Syracuse (SYR)
Effective 2025-05-23 through 2025-05-30
Mon
-
Tue
Wed
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:23, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
22:35
Newark Liberty, New York (EWR) C

23:58
Syracuse (SYR)
Operates only on 2025-05-26
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:23, non-stop
Embraer EMB 170 / EMB 175 (E70)
United Airlines UA3666
22:35
Newark Liberty, New York (EWR) C

23:58
Syracuse (SYR)
Effective 2025-06-02 through 2025-06-18
Mon
Tue
Wed
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:23, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
22:35
Newark Liberty, New York (EWR) C

23:58
Syracuse (SYR)
Effective 2025-06-19 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:23, non-stop
Embraer EMB 175 (E7W)
United Airlines UA3666
23:00
Newark Liberty, New York (EWR) C

00:23(+1)
Syracuse (SYR)
Effective 2025-05-24 through 2025-06-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:23, non-stop
Embraer EMB 175 (E7W)
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:
  • Chicago O'Hare (ORD) - Baltimore (BWI)
  • Newark Liberty, New York (EWR) - Greenville/Spartanburg (GSP)
  • Newark Liberty, New York (EWR) - Syracuse (SYR)
All United Airlines flights
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