Delta Air Lines flights from Ontario, Los Angeles (ONT) to Seattle-Tacoma (SEA).

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FLIGHT SCHEDULE
Direct Flights:
Daily 11:29 Ontario, Los Angeles (ONT) 2 14:13 Seattle-Tacoma (SEA) Delta Air Lines DL 3589 Non-stop Embraer EMB 175 (E7W) 2:44 Effective 2025-08-11 through 2025-09-07
Daily 14:35 Ontario, Los Angeles (ONT) 2 17:30 Seattle-Tacoma (SEA) Delta Air Lines DL 3589 Non-stop Embraer EMB 175 (E7W) 2:55 Effective 2025-06-08 through 2025-06-28
Mon-Thu,Sat,Sun 14:35 Ontario, Los Angeles (ONT) 2 17:30 Seattle-Tacoma (SEA) Delta Air Lines DL 3589 Non-stop Embraer EMB 175 (E7W) 2:55 Effective 2025-06-29 through 2025-07-06
Daily 14:38 Ontario, Los Angeles (ONT) 2 17:22 Seattle-Tacoma (SEA) Delta Air Lines DL 3589 Non-stop Embraer EMB 175 (E7W) 2:44 Effective 2025-07-07 through 2025-08-10
Fri 14:55 Ontario, Los Angeles (ONT) 2 17:50 Seattle-Tacoma (SEA) Delta Air Lines DL 3589 Non-stop Embraer EMB 175 (E7W) 2:55 Operates only on 2025-07-04
Daily 11:05 Ontario, Los Angeles (ONT) 2 14:02 Seattle-Tacoma (SEA) Delta Air Lines DL 3593 Non-stop Embraer EMB 175 (E7W) 2:57 Effective 2025-06-08 through 2025-07-06
Daily 11:29 Ontario, Los Angeles (ONT) 2 14:19 Seattle-Tacoma (SEA) Delta Air Lines DL 3593 Non-stop Embraer EMB 175 (E7W) 2:50 Effective 2025-07-07 through 2025-08-10
Daily 18:07 Ontario, Los Angeles (ONT) 2 21:06 Seattle-Tacoma (SEA) Delta Air Lines DL 3884 Non-stop Embraer EMB 175 (E7W) 2:59 Effective 2025-12-20 through 2026-01-05
Daily 14:00 Ontario, Los Angeles (ONT) 2 16:57 Seattle-Tacoma (SEA) Delta Air Lines DL 3946 Non-stop Embraer EMB 175 (E7W) 2:57 Effective 2025-09-08 through 2025-12-19
Mon-Fri,Sun 14:35 Ontario, Los Angeles (ONT) 2 17:25 Seattle-Tacoma (SEA) Delta Air Lines DL 3946 Non-stop Embraer EMB 175 (E7W) 2:50 Valid until 2025-05-06
Sat 14:35 Ontario, Los Angeles (ONT) 2 17:27 Seattle-Tacoma (SEA) Delta Air Lines DL 3946 Non-stop Embraer EMB 175 (E7W) 2:52 Valid until 2025-05-03
Daily 14:55 Ontario, Los Angeles (ONT) 2 17:55 Seattle-Tacoma (SEA) Delta Air Lines DL 3946 Non-stop Embraer EMB 175 (E7W) 3:00 Effective 2025-05-07 through 2025-06-07
Daily 17:30 Ontario, Los Angeles (ONT) 2 20:25 Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 2:55 Valid until 2025-05-06
Daily 17:45 Ontario, Los Angeles (ONT) 2 20:34 Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-06-08 through 2025-07-03
Sun 17:45 Ontario, Los Angeles (ONT) 2 20:34 Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 2:49 Operates only on 2025-07-06
Daily 17:50 Ontario, Los Angeles (ONT) 2 20:50 Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 3:00 Effective from 2026-01-06
Daily 17:51 Ontario, Los Angeles (ONT) 2 20:50 Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 2:59 Effective 2025-09-08 through 2025-12-19
Daily 17:53 Ontario, Los Angeles (ONT) 2 20:36 Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 2:43 Effective 2025-07-07 through 2025-09-07
Daily 19:05 Ontario, Los Angeles (ONT) 2 22:07 Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 3:02 Effective 2025-05-07 through 2025-06-07
Daily 05:45 Ontario, Los Angeles (ONT) 2 08:42 Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 2:57 Valid until 2025-05-06
Daily 06:00 Ontario, Los Angeles (ONT) 2 08:55 Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 2:55 Effective 2025-05-07 through 2025-06-07
Daily 06:30 Ontario, Los Angeles (ONT) 2 09:28 Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 2:58 Effective 2025-06-08 through 2025-07-06
Daily 07:00 Ontario, Los Angeles (ONT) 2 09:49 Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-07-07 through 2025-09-07
Daily 07:00 Ontario, Los Angeles (ONT) 2 10:02 Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 3:02 Effective 2025-09-08 through 2026-01-05
Daily 07:00 Ontario, Los Angeles (ONT) 2 10:04 Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 3:04 Effective from 2026-01-06
Daily 11:29 Ontario, Los Angeles (ONT) 2 14:28 Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 2:59 Effective 2025-09-08 through 2025-12-19
Daily 11:29 Ontario, Los Angeles (ONT) 2 14:28 Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 2:59 Effective from 2026-01-06
Daily 11:44 Ontario, Los Angeles (ONT) 2 14:45 Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 3:01 Effective 2025-05-07 through 2025-05-25
Daily 11:44 Ontario, Los Angeles (ONT) 2 14:45 Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 3:01 Effective 2025-05-27 through 2025-06-07
Daily 11:45 Ontario, Los Angeles (ONT) 2 14:40 Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 2:55 Valid until 2025-05-06
Mon 11:46 Ontario, Los Angeles (ONT) 2 14:45 Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 2:59 Operates only on 2025-05-26

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Parallax here ONT-SEA

A domestic route departing from the Ontario, Los Angeles airport (ONT) and arriving at Seattle-Tacoma airport (SEA).
The flight distance is 956 miles, or 1539 km.
The timezone of both the departure and the arrival airports is UTC-8 . Current time at both airports is (loading...).
For direct flights, the flight time varies between 2:43 and 3:04.

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Delta Air Lines flights from Ontario, Los Angeles (ONT) to Seattle-Tacoma (SEA).

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FLIGHT SCHEDULE

Direct Flights:

Delta Air Lines DL3589

11:29

Ontario, Los Angeles (ONT) 2

14:13

Seattle-Tacoma (SEA)

Effective 2025-08-11 through 2025-09-07

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:44, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3589

14:35

Ontario, Los Angeles (ONT) 2

17:30

Seattle-Tacoma (SEA)

Effective 2025-06-08 through 2025-06-28

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:55, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3589

14:35

Ontario, Los Angeles (ONT) 2

17:30

Seattle-Tacoma (SEA)

Effective 2025-06-29 through 2025-07-06

Mon

Tue

Wed

Thu

Fri
-

Sat

Sun

Duration: 2:55, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3589

14:38

Ontario, Los Angeles (ONT) 2

17:22

Seattle-Tacoma (SEA)

Effective 2025-07-07 through 2025-08-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:44, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3589

14:55

Ontario, Los Angeles (ONT) 2

17:50

Seattle-Tacoma (SEA)

Operates only on 2025-07-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 2:55, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3593

11:05

Ontario, Los Angeles (ONT) 2

14:02

Seattle-Tacoma (SEA)

Effective 2025-06-08 through 2025-07-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:57, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3593

11:29

Ontario, Los Angeles (ONT) 2

14:19

Seattle-Tacoma (SEA)

Effective 2025-07-07 through 2025-08-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:50, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3884

18:07

Ontario, Los Angeles (ONT) 2

21:06

Seattle-Tacoma (SEA)

Effective 2025-12-20 through 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:59, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3946

14:00

Ontario, Los Angeles (ONT) 2

16:57

Seattle-Tacoma (SEA)

Effective 2025-09-08 through 2025-12-19

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:57, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3946

14:35

Ontario, Los Angeles (ONT) 2

17:25

Seattle-Tacoma (SEA)

Valid until 2025-05-06

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 2:50, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3946

14:35

Ontario, Los Angeles (ONT) 2

17:27

Seattle-Tacoma (SEA)

Valid until 2025-05-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:52, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL3946

14:55

Ontario, Los Angeles (ONT) 2

17:55

Seattle-Tacoma (SEA)

Effective 2025-05-07 through 2025-06-07

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:00, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4031

17:30

Ontario, Los Angeles (ONT) 2

20:25

Seattle-Tacoma (SEA)

Valid until 2025-05-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:55, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4031

17:45

Ontario, Los Angeles (ONT) 2

20:34

Seattle-Tacoma (SEA)

Effective 2025-06-08 through 2025-07-03

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:49, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4031

17:45

Ontario, Los Angeles (ONT) 2

20:34

Seattle-Tacoma (SEA)

Operates only on 2025-07-06

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:49, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4031

17:50

Ontario, Los Angeles (ONT) 2

20:50

Seattle-Tacoma (SEA)

Effective from 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:00, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4031

17:51

Ontario, Los Angeles (ONT) 2

20:50

Seattle-Tacoma (SEA)

Effective 2025-09-08 through 2025-12-19

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:59, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4031

17:53

Ontario, Los Angeles (ONT) 2

20:36

Seattle-Tacoma (SEA)

Effective 2025-07-07 through 2025-09-07

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:43, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4031

19:05

Ontario, Los Angeles (ONT) 2

22:07

Seattle-Tacoma (SEA)

Effective 2025-05-07 through 2025-06-07

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:02, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4042

05:45

Ontario, Los Angeles (ONT) 2

08:42

Seattle-Tacoma (SEA)

Valid until 2025-05-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:57, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4042

06:00

Ontario, Los Angeles (ONT) 2

08:55

Seattle-Tacoma (SEA)

Effective 2025-05-07 through 2025-06-07

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:55, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4042

06:30

Ontario, Los Angeles (ONT) 2

09:28

Seattle-Tacoma (SEA)

Effective 2025-06-08 through 2025-07-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:58, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4042

07:00

Ontario, Los Angeles (ONT) 2

09:49

Seattle-Tacoma (SEA)

Effective 2025-07-07 through 2025-09-07

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:49, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4042

07:00

Ontario, Los Angeles (ONT) 2

10:02

Seattle-Tacoma (SEA)

Effective 2025-09-08 through 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:02, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4042

07:00

Ontario, Los Angeles (ONT) 2

10:04

Seattle-Tacoma (SEA)

Effective from 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:04, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4070

11:29

Ontario, Los Angeles (ONT) 2

14:28

Seattle-Tacoma (SEA)

Effective 2025-09-08 through 2025-12-19

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:59, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4070

11:29

Ontario, Los Angeles (ONT) 2

14:28

Seattle-Tacoma (SEA)

Effective from 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:59, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4070

11:44

Ontario, Los Angeles (ONT) 2

14:45

Seattle-Tacoma (SEA)

Effective 2025-05-07 through 2025-05-25

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:01, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4070

11:44

Ontario, Los Angeles (ONT) 2

14:45

Seattle-Tacoma (SEA)

Effective 2025-05-27 through 2025-06-07

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:01, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4070

11:45

Ontario, Los Angeles (ONT) 2

14:40

Seattle-Tacoma (SEA)

Valid until 2025-05-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:55, non-stop
Embraer EMB 175 (E7W)

Delta Air Lines DL4070

11:46

Ontario, Los Angeles (ONT) 2

14:45

Seattle-Tacoma (SEA)

Operates only on 2025-05-26

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:59, non-stop
Embraer EMB 175 (E7W)

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Parallax here ONT-SEA

A domestic route departing from the Ontario, Los Angeles airport (ONT) and arriving at Seattle-Tacoma airport (SEA).
The flight distance is 956 miles, or 1539 km.
The timezone of both the departure and the arrival airports is UTC-8 . Current time at both airports is (loading...).
For direct flights, the flight time varies between 2:43 and 3:04.

All ONT-SEA flights

All Delta Air Lines flights

Return (SEA-ONT) flights

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