United Airlines flight UA 1721: San Diego - Kona via San Francisco

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Thu,Sat 06:15 San Diego (SAN) 2 08:05 San Francisco (SFO) 3
UA 1721 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Effective 2026-02-12 through 2026-02-14
Fri 06:15 San Diego (SAN) 2 08:05 San Francisco (SFO) 3
UA 1721 Non-stop Boeing 737 MAX 9 (7M9) 1:50 Operates only on 2026-02-13
Sun 06:15 San Diego (SAN) 2 08:05 San Francisco (SFO) 3
UA 1721 Non-stop Boeing 737-800 (738) 1:50 Effective 2026-02-15 through 2026-03-01
Mon,Thu,Fri 06:15 San Diego (SAN) 2 08:05 San Francisco (SFO) 3
UA 1721 Non-stop Boeing 737-900 (739) 1:50 Effective 2026-02-16 through 2026-02-20
Sat 06:15 San Diego (SAN) 2 08:05 San Francisco (SFO) 3
UA 1721 Non-stop Boeing 737 MAX 8 (7M8) 1:50 Effective 2026-02-21 through 2026-02-28
Mon 06:15 San Diego (SAN) 2 08:05 San Francisco (SFO) 3
UA 1721 Non-stop Boeing 737 MAX 9 (7M9) 1:50 Operates only on 2026-02-23
Mon,Thu,Fri 06:15 San Diego (SAN) 2 08:05 San Francisco (SFO) 3
UA 1721 Non-stop Boeing 737-900 (739) 1:50 Effective 2026-02-26 through 2026-03-02
Daily 08:10 San Francisco (SFO) 3 10:47 Kona (KOA)
UA 1721 Non-stop Boeing 757-300 (753) 5:37 Effective 2026-03-29 through 2026-05-20
Daily 08:10 San Francisco (SFO) 3 10:49 Kona (KOA)
UA 1721 Non-stop Boeing 757-300 (753) 5:39 Effective from 2026-10-25
Daily 08:20 San Francisco (SFO) 3 10:41 Kona (KOA)
UA 1721 Non-stop Boeing 757-300 (753) 5:21 Effective 2026-05-21 through 2026-09-07
Daily 08:20 San Francisco (SFO) 3 10:50 Kona (KOA)
UA 1721 Non-stop Boeing 737 MAX 9 (7M9) 5:30 Effective 2026-09-08 through 2026-09-23
Daily 08:20 San Francisco (SFO) 3 10:45 Kona (KOA)
UA 1721 Non-stop Boeing 757-300 (753) 5:25 Effective 2026-09-24 through 2026-10-24
Daily 09:00 San Francisco (SFO) 3 12:57 Kona (KOA)
UA 1721 Non-stop Boeing 757-300 (753) 5:57 Effective 2026-01-06 through 2026-02-11
Daily 09:05 San Francisco (SFO) 3 12:51 Kona (KOA)
UA 1721 Non-stop Boeing 777 (777) 5:46 Valid until 2026-01-05
Daily 09:05 San Francisco (SFO) 3 12:59 Kona (KOA)
UA 1721 Non-stop Boeing 757-300 (753) 5:54 Effective 2026-02-12 through 2026-03-07
Daily 09:05 San Francisco (SFO) 3 11:59 Kona (KOA)
UA 1721 Non-stop Boeing 757-300 (753) 5:54 Effective 2026-03-08 through 2026-03-28
Non-Direct Flights:
Thu,Sat 06:15 San Diego (SAN) 2 12:59 Kona (KOA)
UA 1721 1-stop Boeing 737 MAX 8 (7M8) 8:44 Effective 2026-02-12 through 2026-02-14
Fri 06:15 San Diego (SAN) 2 12:59 Kona (KOA)
UA 1721 1-stop Boeing 737 MAX 9 (7M9) 8:44 Operates only on 2026-02-13
Sun 06:15 San Diego (SAN) 2 12:59 Kona (KOA)
UA 1721 1-stop Boeing 737-800 (738) 8:44 Effective 2026-02-15 through 2026-03-01
Mon,Thu,Fri 06:15 San Diego (SAN) 2 12:59 Kona (KOA)
UA 1721 1-stop Boeing 737-900 (739) 8:44 Effective 2026-02-16 through 2026-02-20
Sat 06:15 San Diego (SAN) 2 12:59 Kona (KOA)
UA 1721 1-stop Boeing 737 MAX 8 (7M8) 8:44 Effective 2026-02-21 through 2026-02-28
Mon 06:15 San Diego (SAN) 2 12:59 Kona (KOA)
UA 1721 1-stop Boeing 737 MAX 9 (7M9) 8:44 Operates only on 2026-02-23
Mon,Thu,Fri 06:15 San Diego (SAN) 2 12:59 Kona (KOA)
UA 1721 1-stop Boeing 737-900 (739) 8:44 Effective 2026-02-26 through 2026-03-02
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United Airlines flight UA 1721:
San Diego - Kona via San Francisco
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

08:05
San Francisco (SFO) 3
Effective 2026-02-12 through 2026-02-14
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
Sun
-
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

08:05
San Francisco (SFO) 3
Operates only on 2026-02-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737 MAX 9 (7M9)
Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

08:05
San Francisco (SFO) 3
Effective 2026-02-15 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:50, non-stop
Boeing 737-800 (738)
Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

08:05
San Francisco (SFO) 3
Effective 2026-02-16 through 2026-02-20
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737-900 (739)
Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

08:05
San Francisco (SFO) 3
Effective 2026-02-21 through 2026-02-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:50, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

08:05
San Francisco (SFO) 3
Operates only on 2026-02-23
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737 MAX 9 (7M9)
Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

08:05
San Francisco (SFO) 3
Effective 2026-02-26 through 2026-03-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:50, non-stop
Boeing 737-900 (739)
Direct Flights:
United Airlines UA1721
08:10
San Francisco (SFO) 3

10:47
Kona (KOA)
Effective 2026-03-29 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:37, non-stop
Boeing 757-300 (753)
Direct Flights:
United Airlines UA1721
08:10
San Francisco (SFO) 3

10:49
Kona (KOA)
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:39, non-stop
Boeing 757-300 (753)
Direct Flights:
United Airlines UA1721
08:20
San Francisco (SFO) 3

10:41
Kona (KOA)
Effective 2026-05-21 through 2026-09-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:21, non-stop
Boeing 757-300 (753)
Direct Flights:
United Airlines UA1721
08:20
San Francisco (SFO) 3

10:50
Kona (KOA)
Effective 2026-09-08 through 2026-09-23
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:30, non-stop
Boeing 737 MAX 9 (7M9)
Direct Flights:
United Airlines UA1721
08:20
San Francisco (SFO) 3

10:45
Kona (KOA)
Effective 2026-09-24 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:25, non-stop
Boeing 757-300 (753)
Direct Flights:
United Airlines UA1721
09:00
San Francisco (SFO) 3

12:57
Kona (KOA)
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:57, non-stop
Boeing 757-300 (753)
Direct Flights:
United Airlines UA1721
09:05
San Francisco (SFO) 3

12:51
Kona (KOA)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:46, non-stop
Boeing 777 (777)
Direct Flights:
United Airlines UA1721
09:05
San Francisco (SFO) 3

12:59
Kona (KOA)
Effective 2026-02-12 through 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:54, non-stop
Boeing 757-300 (753)
Direct Flights:
United Airlines UA1721
09:05
San Francisco (SFO) 3

11:59
Kona (KOA)
Effective 2026-03-08 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:54, non-stop
Boeing 757-300 (753)
Non-Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

12:59
Kona (KOA)
Effective 2026-02-12 through 2026-02-14
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
Sun
-
Duration: 8:44, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

12:59
Kona (KOA)
Operates only on 2026-02-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 8:44, 1-stop
Boeing 737 MAX 9 (7M9)
Non-Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

12:59
Kona (KOA)
Effective 2026-02-15 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 8:44, 1-stop
Boeing 737-800 (738)
Non-Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

12:59
Kona (KOA)
Effective 2026-02-16 through 2026-02-20
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 8:44, 1-stop
Boeing 737-900 (739)
Non-Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

12:59
Kona (KOA)
Effective 2026-02-21 through 2026-02-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 8:44, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

12:59
Kona (KOA)
Operates only on 2026-02-23
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 8:44, 1-stop
Boeing 737 MAX 9 (7M9)
Non-Direct Flights:
United Airlines UA1721
06:15
San Diego (SAN) 2

12:59
Kona (KOA)
Effective 2026-02-26 through 2026-03-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 8:44, 1-stop
Boeing 737-900 (739)
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Parallax here SAN-KOA
  • UA 1721 is a domestic flight departing from the San Diego airport (SAN) and arriving at Kona airport (KOA).
  • The flight runs via San Francisco (SFO).
  • The flight distance is 2551 miles, or 4106 km.
  • The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-10 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
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