United Airlines flight UA 1684: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Daily 17:00 San Francisco (SFO) 3 19:38 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:38 Effective 2025-06-26 through 2025-08-18
Mon,Fri-Sun 17:15 San Francisco (SFO) 3 19:55 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:40 Effective 2025-09-26 through 2025-10-25
Daily 17:17 San Francisco (SFO) 3 19:55 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:38 Effective 2025-05-22 through 2025-06-25
Mon,Fri-Sun 17:20 San Francisco (SFO) 3 19:58 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:38 Effective 2025-08-22 through 2025-09-22
Daily 17:50 Dulles, Washington (IAD) 20:28 Austin (AUS)
UA 1684 Non-stop Boeing 737-900 (739) 3:38 Valid until 2025-05-21
Sat 18:25 San Francisco (SFO) 3 21:22 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:57 Operates only on 2025-11-01
Sat 18:25 San Francisco (SFO) 3 22:22 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:57 Effective 2025-11-08 through 2025-12-13
Daily 18:25 San Francisco (SFO) 3 22:22 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:57 Effective 2025-12-18 through 2026-01-05
Sat 18:25 San Francisco (SFO) 3 22:22 Lihue (LIH)
UA 1684 Non-stop Boeing 737 MAX 8 (7M8) 5:57 Effective from 2026-02-14
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This flight number is listed as serving the following routes:


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United Airlines flight UA 1684: Multiple routes
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Select flight date:  Show Calendar
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA1684
17:00
San Francisco (SFO) 3

19:38
Lihue (LIH)
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:38, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA1684
17:15
San Francisco (SFO) 3

19:55
Lihue (LIH)
Effective 2025-09-26 through 2025-10-25
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Duration: 5:40, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA1684
17:17
San Francisco (SFO) 3

19:55
Lihue (LIH)
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:38, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA1684
17:20
San Francisco (SFO) 3

19:58
Lihue (LIH)
Effective 2025-08-22 through 2025-09-22
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Duration: 5:38, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA1684
17:50
Dulles, Washington (IAD)

20:28
Austin (AUS)
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:38, non-stop
Boeing 737-900 (739)
United Airlines UA1684
18:25
San Francisco (SFO) 3

21:22
Lihue (LIH)
Operates only on 2025-11-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:57, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA1684
18:25
San Francisco (SFO) 3

22:22
Lihue (LIH)
Effective 2025-11-08 through 2025-12-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:57, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA1684
18:25
San Francisco (SFO) 3

22:22
Lihue (LIH)
Effective 2025-12-18 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:57, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA1684
18:25
San Francisco (SFO) 3

22:22
Lihue (LIH)
Effective from 2026-02-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:57, non-stop
Boeing 737 MAX 8 (7M8)
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This flight number is listed as serving the following routes:
  • Dulles, Washington (IAD) - Austin (AUS)
  • San Francisco (SFO) - Lihue (LIH)
All United Airlines flights
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