United Airlines flights from Denver (DEN) to San Diego (SAN).

FLIGHT SCHEDULE
Direct Flights:
Daily 07:45 Denver (DEN) 09:20 San Diego (SAN) 2 United Airlines UA 2309 Non-stop Boeing 737-900 (739) 2:35 Effective 2026-01-06 through 2026-02-11
Daily 07:45 Denver (DEN) 09:20 San Diego (SAN) 2 United Airlines UA 2309 Non-stop Boeing 737-900 (739) 2:35 Effective 2026-03-05 through 2026-03-28
Daily 07:45 Denver (DEN) 09:14 San Diego (SAN) 2 United Airlines UA 2309 Non-stop Boeing 737-900 (739) 2:29 Effective 2026-03-29 through 2026-04-29
Daily 07:45 Denver (DEN) 09:15 San Diego (SAN) 2 United Airlines UA 2309 Non-stop Boeing 737 MAX 9 (7M9) 2:30 Effective 2026-04-30 through 2026-05-20
Daily 08:00 Denver (DEN) 09:17 San Diego (SAN) 2 United Airlines UA 2309 Non-stop Boeing 737-900 (739) 2:17 Effective from 2026-05-21
Mon,Tue,Fri-Sun 08:05 Denver (DEN) 09:39 San Diego (SAN) 2 United Airlines UA 2309 Non-stop Boeing 737 MAX 9 (7M9) 2:34 Valid until 2026-01-04
Mon,Thu 08:05 Denver (DEN) 09:39 San Diego (SAN) 2 United Airlines UA 2309 Non-stop Boeing 737-900 (739) 2:34 Valid until 2026-01-05
Non-Direct Flights:
Mon-Sat 07:45 Denver (DEN) 14:49 San Diego (SAN) 2 United Airlines UA 2391 1-stop Boeing 757-200 (752) 8:04 Effective 2026-02-12 through 2026-03-04
Sun 07:45 Denver (DEN) 14:49 San Diego (SAN) 2 United Airlines UA 2391 1-stop Boeing 737-800 (738) 8:04 Effective 2026-02-15 through 2026-03-01
Mon-Fri,Sun 07:47 Denver (DEN) 14:58 San Diego (SAN) 2 United Airlines UA 2391 1-stop Boeing 757-300 (753) 8:11 Valid until 2026-01-05
Sat 07:47 Denver (DEN) 14:58 San Diego (SAN) 2 United Airlines UA 2391 1-stop Airbus A321neo (32Q) 8:11 Operates only on 2026-01-03
Mon,Tue,Fri-Sun 07:47 Denver (DEN) 14:52 San Diego (SAN) 2 United Airlines UA 2391 1-stop Boeing 757-200 (752) 8:05 Effective 2026-01-06 through 2026-02-10
Wed,Thu 07:47 Denver (DEN) 14:52 San Diego (SAN) 2 United Airlines UA 2391 1-stop Boeing 737-900 (739) 8:05 Effective 2026-01-07 through 2026-01-29
Wed 07:47 Denver (DEN) 14:52 San Diego (SAN) 2 United Airlines UA 2391 1-stop Boeing 737 MAX 9 (7M9) 8:05 Operates only on 2026-02-04
Thu 07:47 Denver (DEN) 14:52 San Diego (SAN) 2 United Airlines UA 2391 1-stop Boeing 737-900 (739) 8:05 Operates only on 2026-02-05
Wed 07:47 Denver (DEN) 14:52 San Diego (SAN) 2 United Airlines UA 2391 1-stop Boeing 757-200 (752) 8:05 Operates only on 2026-02-11
Daily 15:57 Denver (DEN) 20:48 San Diego (SAN) 2 United Airlines UA 2633 1-stop Airbus A321neo (32Q) 5:51 Valid until 2026-01-04
Mon 15:57 Denver (DEN) 20:48 San Diego (SAN) 2 United Airlines UA 2633 1-stop Boeing 737-900 (739) 5:51 Operates only on 2026-01-05

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A domestic route departing from the Denver airport (DEN) and arriving at San Diego airport (SAN).
The flight distance is 851 miles, or 1370 km.
The timezone of the departure airport is UTC-7 , and the timezone of the arrival airport is UTC-8 . 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.
For direct flights, the flight time varies between 2:17 and 2:39.

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United Airlines flights from Denver (DEN) to San Diego (SAN).

FLIGHT SCHEDULE

Direct Flights:

United Airlines UA2309

07:45

Denver (DEN)

09:20

San Diego (SAN) 2

Effective 2026-01-06 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:35, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA2309

07:45

Denver (DEN)

09:20

San Diego (SAN) 2

Effective 2026-03-05 through 2026-03-28

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:35, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA2309

07:45

Denver (DEN)

09:14

San Diego (SAN) 2

Effective 2026-03-29 through 2026-04-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:29, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA2309

07:45

Denver (DEN)

09:15

San Diego (SAN) 2

Effective 2026-04-30 through 2026-05-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:30, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2309

08:00

Denver (DEN)

09:17

San Diego (SAN) 2

Effective from 2026-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:17, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA2309

08:05

Denver (DEN)

09:39

San Diego (SAN) 2

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat

Sun

Duration: 2:34, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2309

08:05

Denver (DEN)

09:39

San Diego (SAN) 2

Valid until 2026-01-05

Mon

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:34, non-stop
Boeing 737-900 (739)

Non-Direct Flights:

United Airlines UA2391

07:45

Denver (DEN)

14:49

San Diego (SAN) 2

Effective 2026-02-12 through 2026-03-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Duration: 8:04, 1-stop
Boeing 757-200 (752)

Non-Direct Flights:

United Airlines UA2391

07:45

Denver (DEN)

14:49

San Diego (SAN) 2

Effective 2026-02-15 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 8:04, 1-stop
Boeing 737-800 (738)

Non-Direct Flights:

United Airlines UA2391

07:47

Denver (DEN)

14:58

San Diego (SAN) 2

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 8:11, 1-stop
Boeing 757-300 (753)

Non-Direct Flights:

United Airlines UA2391

07:47

Denver (DEN)

14:58

San Diego (SAN) 2

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 8:11, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA2391

07:47

Denver (DEN)

14:52

San Diego (SAN) 2

Effective 2026-01-06 through 2026-02-10

Mon

Tue

Wed
-

Thu
-

Fri

Sat

Sun

Duration: 8:05, 1-stop
Boeing 757-200 (752)

Non-Direct Flights:

United Airlines UA2391

07:47

Denver (DEN)

14:52

San Diego (SAN) 2

Effective 2026-01-07 through 2026-01-29

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 8:05, 1-stop
Boeing 737-900 (739)

Non-Direct Flights:

United Airlines UA2391

07:47

Denver (DEN)

14:52

San Diego (SAN) 2

Operates only on 2026-02-04

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 8:05, 1-stop
Boeing 737 MAX 9 (7M9)

Non-Direct Flights:

United Airlines UA2391

07:47

Denver (DEN)

14:52

San Diego (SAN) 2

Operates only on 2026-02-05

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 8:05, 1-stop
Boeing 737-900 (739)

Non-Direct Flights:

United Airlines UA2391

07:47

Denver (DEN)

14:52

San Diego (SAN) 2

Operates only on 2026-02-11

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 8:05, 1-stop
Boeing 757-200 (752)

Non-Direct Flights:

United Airlines UA2633

15:57

Denver (DEN)

20:48

San Diego (SAN) 2

Valid until 2026-01-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:51, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA2633

15:57

Denver (DEN)

20:48

San Diego (SAN) 2

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:51, 1-stop
Boeing 737-900 (739)

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A domestic route departing from the Denver airport (DEN) and arriving at San Diego airport (SAN).
The flight distance is 851 miles, or 1370 km.
The timezone of the departure airport is UTC-7 , and the timezone of the arrival airport is UTC-8 . 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.
For direct flights, the flight time varies between 2:17 and 2:39.

All DEN-SAN flights

All United Airlines flights

Return (SAN-DEN) flights

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