United Airlines flight UA 1684: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon-Fri,Sun 07:30 Ronald Reagan Washington (DCA) 2 08:52 Chicago O'Hare (ORD) 1
UA 1684 Non-stop Airbus A319 (319) 2:22 Effective 2026-01-06 through 2026-02-03
Mon-Fri,Sun 07:30 Ronald Reagan Washington (DCA) 2 08:52 Chicago O'Hare (ORD) 1
UA 1684 Non-stop Airbus A319 (319) 2:22 Effective 2026-02-05 through 2026-02-11
Sat 16:55 San Francisco (SFO) 3 21:02 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 6:07 Operates only on 2026-03-07
Mon,Thu-Sun 16:55 San Francisco (SFO) 3 19:52 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:57 Effective 2026-03-29 through 2026-04-27
Sat 16:55 San Francisco (SFO) 3 19:52 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:57 Effective 2026-05-02 through 2026-05-16
Daily 16:55 San Francisco (SFO) 3 19:40 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:45 Effective 2026-05-21 through 2026-08-10
Mon,Thu-Sun 16:55 San Francisco (SFO) 3 19:40 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:45 Effective 2026-08-13 through 2026-09-07
Mon,Fri-Sun 16:55 San Francisco (SFO) 3 19:40 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:45 Effective 2026-09-11 through 2026-09-28
Mon,Thu-Sun 16:55 San Francisco (SFO) 3 19:40 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:45 Effective 2026-10-01 through 2026-10-24
Sat 18:30 San Francisco (SFO) 3 22:34 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 6:04 Effective 2026-01-10 through 2026-02-07
Mon,Thu-Sun 18:37 San Francisco (SFO) 3 22:44 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 6:07 Effective 2026-02-12 through 2026-03-02
Daily 18:40 San Francisco (SFO) 3 22:44 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 6:04 Valid until 2026-01-05
Thu,Fri 18:50 San Francisco (SFO) 3 22:57 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 6:07 Effective 2026-03-05 through 2026-03-06
Daily 18:50 San Francisco (SFO) 3 21:57 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 6:07 Effective 2026-03-08 through 2026-03-28
This flight number is listed as serving the following routes:


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United Airlines flight UA 1684: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA1684
07:30
Ronald Reagan Washington (DCA) 2

08:52
Chicago O'Hare (ORD) 1
Effective 2026-01-06 through 2026-02-03
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:22, non-stop
Airbus A319 (319)
Direct Flights:
United Airlines UA1684
07:30
Ronald Reagan Washington (DCA) 2

08:52
Chicago O'Hare (ORD) 1
Effective 2026-02-05 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:22, non-stop
Airbus A319 (319)
Direct Flights:
United Airlines UA1684
16:55
San Francisco (SFO) 3

21:02
Lihue (LIH)
Operates only on 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 6:07, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
16:55
San Francisco (SFO) 3

19:52
Lihue (LIH)
Effective 2026-03-29 through 2026-04-27
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 5:57, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
16:55
San Francisco (SFO) 3

19:52
Lihue (LIH)
Effective 2026-05-02 through 2026-05-16
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:57, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
16:55
San Francisco (SFO) 3

19:40
Lihue (LIH)
Effective 2026-05-21 through 2026-08-10
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:45, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
16:55
San Francisco (SFO) 3

19:40
Lihue (LIH)
Effective 2026-08-13 through 2026-09-07
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 5:45, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
16:55
San Francisco (SFO) 3

19:40
Lihue (LIH)
Effective 2026-09-11 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Duration: 5:45, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
16:55
San Francisco (SFO) 3

19:40
Lihue (LIH)
Effective 2026-10-01 through 2026-10-24
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 5:45, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
18:30
San Francisco (SFO) 3

22:34
Lihue (LIH)
Effective 2026-01-10 through 2026-02-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 6:04, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
18:37
San Francisco (SFO) 3

22:44
Lihue (LIH)
Effective 2026-02-12 through 2026-03-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 6:07, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
18:40
San Francisco (SFO) 3

22:44
Lihue (LIH)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:04, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
18:50
San Francisco (SFO) 3

22:57
Lihue (LIH)
Effective 2026-03-05 through 2026-03-06
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 6:07, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1684
18:50
San Francisco (SFO) 3

21:57
Lihue (LIH)
Effective 2026-03-08 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:07, non-stop
Boeing 737 MAX 8 (7M8)
This flight number is listed as serving the following routes:
  • Ronald Reagan Washington (DCA) - Chicago O'Hare (ORD)
  • San Francisco (SFO) - Lihue (LIH)
All United Airlines flights
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