United Airlines flights from Denver (DEN) to Ontario, Los Angeles (ONT).

FLIGHT SCHEDULE
Direct Flights:
Mon,Tue,Thu-Sat 19:43 Denver (DEN) 21:07 Ontario, Los Angeles (ONT) 2 United Airlines UA 425 Non-stop Boeing 737-800 (738) 2:24 Valid until 2026-01-03
Wed,Sun 19:43 Denver (DEN) 21:07 Ontario, Los Angeles (ONT) 2 United Airlines UA 425 Non-stop Boeing 737-900 (739) 2:24 Valid until 2026-01-04
Mon 19:43 Denver (DEN) 21:08 Ontario, Los Angeles (ONT) 2 United Airlines UA 425 Non-stop Boeing 737-800 (738) 2:25 Operates only on 2026-01-05
Daily 11:15 Denver (DEN) 12:38 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Boeing 737-800 (738) 2:23 Valid until 2026-01-05
Daily 11:15 Denver (DEN) 12:43 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Boeing 737-800 (738) 2:28 Effective 2026-02-12 through 2026-03-04
Daily 11:15 Denver (DEN) 12:38 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Airbus A319 (319) 2:23 Effective 2026-03-29 through 2026-04-29
Daily 11:15 Denver (DEN) 12:37 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Boeing 737-800 (738) 2:22 Effective 2026-04-30 through 2026-05-20
Daily 11:15 Denver (DEN) 12:33 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Airbus A320 (320) 2:18 Effective from 2026-05-21
Mon,Wed-Sun 11:20 Denver (DEN) 12:48 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Boeing 737-800 (738) 2:28 Effective 2026-03-05 through 2026-03-28
Tue 11:20 Denver (DEN) 12:49 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Airbus A320 (320) 2:29 Effective 2026-03-10 through 2026-03-24
Mon-Thu,Sat,Sun 11:23 Denver (DEN) 12:47 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Boeing 737 MAX 9 (7M9) 2:24 Effective 2026-01-06 through 2026-01-27
Fri 11:23 Denver (DEN) 12:48 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Airbus A319 (319) 2:25 Effective 2026-01-09 through 2026-02-06
Wed 11:23 Denver (DEN) 12:47 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Boeing 737-800 (738) 2:24 Operates only on 2026-01-28
Mon,Tue,Thu,Sat,Sun 11:23 Denver (DEN) 12:47 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Boeing 737 MAX 9 (7M9) 2:24 Effective 2026-01-29 through 2026-02-10
Wed 11:23 Denver (DEN) 12:47 Ontario, Los Angeles (ONT) 2 United Airlines UA 430 Non-stop Boeing 737-800 (738) 2:24 Operates only on 2026-02-11
Daily 19:20 Denver (DEN) 20:50 Ontario, Los Angeles (ONT) 2 United Airlines UA 1221 Non-stop Boeing 737-800 (738) 2:30 Effective 2026-02-12 through 2026-03-04
Daily 16:00 Denver (DEN) 17:18 Ontario, Los Angeles (ONT) 2 United Airlines UA 1656 Non-stop Airbus A320 (320) 2:18 Effective 2026-05-21 through 2026-10-24
Daily 19:02 Denver (DEN) 20:17 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737-800 (738) 2:15 Effective 2026-05-21 through 2026-10-24
Daily 19:05 Denver (DEN) 20:20 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737-800 (738) 2:15 Effective from 2026-10-25
Mon-Sat 19:20 Denver (DEN) 20:50 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Airbus A319 (319) 2:30 Effective 2026-03-05 through 2026-03-27
Sat 19:20 Denver (DEN) 20:50 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737-900 (739) 2:30 Operates only on 2026-03-28
Daily 19:20 Denver (DEN) 20:46 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737 MAX 9 (7M9) 2:26 Effective 2026-03-29 through 2026-04-29
Sun 19:27 Denver (DEN) 20:57 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Airbus A319 (319) 2:30 Effective 2026-03-08 through 2026-03-22
Daily 19:34 Denver (DEN) 20:58 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737 MAX 9 (7M9) 2:24 Effective 2026-01-06 through 2026-01-16
Sat 19:34 Denver (DEN) 20:58 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737-900 (739) 2:24 Operates only on 2026-01-17
Daily 19:34 Denver (DEN) 20:58 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737 MAX 9 (7M9) 2:24 Effective 2026-01-18 through 2026-02-02
Tue 19:34 Denver (DEN) 20:58 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737 MAX 8 (7M8) 2:24 Operates only on 2026-02-03
Daily 19:34 Denver (DEN) 20:58 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737 MAX 9 (7M9) 2:24 Effective 2026-02-04 through 2026-02-11
Daily 19:35 Denver (DEN) 21:01 Ontario, Los Angeles (ONT) 2 United Airlines UA 2028 Non-stop Boeing 737-800 (738) 2:26 Effective 2026-04-30 through 2026-05-20
Non-Direct Flights:
Daily 11:15 Denver (DEN) 17:47 Ontario, Los Angeles (ONT) 2 United Airlines UA 1561 1-stop Airbus A321neo (32Q) 7:32 Effective from 2026-03-29
Tue-Fri,Sun 11:35 Denver (DEN) 17:41 Ontario, Los Angeles (ONT) 2 United Airlines UA 1561 1-stop Airbus A321neo (32Q) 7:06 Effective 2026-03-05 through 2026-03-15
Sat 11:35 Denver (DEN) 17:38 Ontario, Los Angeles (ONT) 2 United Airlines UA 1561 1-stop Airbus A321neo (32Q) 7:03 Effective 2026-03-07 through 2026-03-21
Mon 11:35 Denver (DEN) 17:35 Ontario, Los Angeles (ONT) 2 United Airlines UA 1561 1-stop Airbus A321neo (32Q) 7:00 Operates only on 2026-03-09
Mon-Fri,Sun 11:35 Denver (DEN) 17:41 Ontario, Los Angeles (ONT) 2 United Airlines UA 1561 1-stop Airbus A321neo (32Q) 7:06 Effective 2026-03-16 through 2026-03-27
Sat 11:35 Denver (DEN) 17:35 Ontario, Los Angeles (ONT) 2 United Airlines UA 1561 1-stop Airbus A321neo (32Q) 7:00 Operates only on 2026-03-28

A domestic route departing from the Denver airport (DEN) and arriving at Ontario, Los Angeles airport (ONT).
The flight distance is 817 miles, or 1315 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 2:15 and 2:30.

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FLIGHT SCHEDULE

Direct Flights:

United Airlines UA425

19:43

Denver (DEN)

21:07

Ontario, Los Angeles (ONT) 2

Valid until 2026-01-03

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun
-

Duration: 2:24, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA425

19:43

Denver (DEN)

21:07

Ontario, Los Angeles (ONT) 2

Valid until 2026-01-04

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:24, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA425

19:43

Denver (DEN)

21:08

Ontario, Los Angeles (ONT) 2

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:25, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA430

11:15

Denver (DEN)

12:38

Ontario, Los Angeles (ONT) 2

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:23, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA430

11:15

Denver (DEN)

12:43

Ontario, Los Angeles (ONT) 2

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:28, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA430

11:15

Denver (DEN)

12:38

Ontario, Los Angeles (ONT) 2

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:23, non-stop
Airbus A319 (319)

Direct Flights:

United Airlines UA430

11:15

Denver (DEN)

12:37

Ontario, Los Angeles (ONT) 2

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:22, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA430

11:15

Denver (DEN)

12:33

Ontario, Los Angeles (ONT) 2

Effective from 2026-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:18, non-stop
Airbus A320 (320)

Direct Flights:

United Airlines UA430

11:20

Denver (DEN)

12:48

Ontario, Los Angeles (ONT) 2

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

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 2:28, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA430

11:20

Denver (DEN)

12:49

Ontario, Los Angeles (ONT) 2

Effective 2026-03-10 through 2026-03-24

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:29, non-stop
Airbus A320 (320)

Direct Flights:

United Airlines UA430

11:23

Denver (DEN)

12:47

Ontario, Los Angeles (ONT) 2

Effective 2026-01-06 through 2026-01-27

Mon

Tue

Wed

Thu

Fri
-

Sat

Sun

Duration: 2:24, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA430

11:23

Denver (DEN)

12:48

Ontario, Los Angeles (ONT) 2

Effective 2026-01-09 through 2026-02-06

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 2:25, non-stop
Airbus A319 (319)

Direct Flights:

United Airlines UA430

11:23

Denver (DEN)

12:47

Ontario, Los Angeles (ONT) 2

Operates only on 2026-01-28

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:24, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA430

11:23

Denver (DEN)

12:47

Ontario, Los Angeles (ONT) 2

Effective 2026-01-29 through 2026-02-10

Mon

Tue

Wed
-

Thu

Fri
-

Sat

Sun

Duration: 2:24, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA430

11:23

Denver (DEN)

12:47

Ontario, Los Angeles (ONT) 2

Operates only on 2026-02-11

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:24, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1221

19:20

Denver (DEN)

20:50

Ontario, Los Angeles (ONT) 2

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:30, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1656

16:00

Denver (DEN)

17:18

Ontario, Los Angeles (ONT) 2

Effective 2026-05-21 through 2026-10-24

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:18, non-stop
Airbus A320 (320)

Direct Flights:

United Airlines UA2028

19:02

Denver (DEN)

20:17

Ontario, Los Angeles (ONT) 2

Effective 2026-05-21 through 2026-10-24

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:15, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA2028

19:05

Denver (DEN)

20:20

Ontario, Los Angeles (ONT) 2

Effective from 2026-10-25

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:15, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA2028

19:20

Denver (DEN)

20:50

Ontario, Los Angeles (ONT) 2

Effective 2026-03-05 through 2026-03-27

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Duration: 2:30, non-stop
Airbus A319 (319)

Direct Flights:

United Airlines UA2028

19:20

Denver (DEN)

20:50

Ontario, Los Angeles (ONT) 2

Operates only on 2026-03-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:30, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA2028

19:20

Denver (DEN)

20:46

Ontario, Los Angeles (ONT) 2

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:26, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2028

19:27

Denver (DEN)

20:57

Ontario, Los Angeles (ONT) 2

Effective 2026-03-08 through 2026-03-22

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:30, non-stop
Airbus A319 (319)

Direct Flights:

United Airlines UA2028

19:34

Denver (DEN)

20:58

Ontario, Los Angeles (ONT) 2

Effective 2026-01-06 through 2026-01-16

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:24, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2028

19:34

Denver (DEN)

20:58

Ontario, Los Angeles (ONT) 2

Operates only on 2026-01-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:24, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA2028

19:34

Denver (DEN)

20:58

Ontario, Los Angeles (ONT) 2

Effective 2026-01-18 through 2026-02-02

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:24, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2028

19:34

Denver (DEN)

20:58

Ontario, Los Angeles (ONT) 2

Operates only on 2026-02-03

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:24, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

United Airlines UA2028

19:34

Denver (DEN)

20:58

Ontario, Los Angeles (ONT) 2

Effective 2026-02-04 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:24, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2028

19:35

Denver (DEN)

21:01

Ontario, Los Angeles (ONT) 2

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:26, non-stop
Boeing 737-800 (738)

Non-Direct Flights:

United Airlines UA1561

11:15

Denver (DEN)

17:47

Ontario, Los Angeles (ONT) 2

Effective from 2026-03-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 7:32, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA1561

11:35

Denver (DEN)

17:41

Ontario, Los Angeles (ONT) 2

Effective 2026-03-05 through 2026-03-15

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 7:06, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA1561

11:35

Denver (DEN)

17:38

Ontario, Los Angeles (ONT) 2

Effective 2026-03-07 through 2026-03-21

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 7:03, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA1561

11:35

Denver (DEN)

17:35

Ontario, Los Angeles (ONT) 2

Operates only on 2026-03-09

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 7:00, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA1561

11:35

Denver (DEN)

17:41

Ontario, Los Angeles (ONT) 2

Effective 2026-03-16 through 2026-03-27

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 7:06, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA1561

11:35

Denver (DEN)

17:35

Ontario, Los Angeles (ONT) 2

Operates only on 2026-03-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 7:00, 1-stop
Airbus A321neo (32Q)

A domestic route departing from the Denver airport (DEN) and arriving at Ontario, Los Angeles airport (ONT).
The flight distance is 817 miles, or 1315 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 2:15 and 2:30.

All DEN-ONT flights

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