All airlines flying from Ontario, Los Angeles (ONT) to Seattle-Tacoma (SEA).

FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon,Thu,Fri,Sun 11:29 Ontario, Los Angeles (ONT) 2 14:19 Seattle-Tacoma (SEA) WestJet WS 8152 Non-stop Embraer EMB 175 (E7W) 2:50 Effective 2025-07-07 through 2025-07-24 Codeshare flight, operated by Delta Air Lines.(DL 3593)
Thu,Sun 11:29 Ontario, Los Angeles (ONT) 2 14:19 Seattle-Tacoma (SEA) WestJet WS 8152 Non-stop Embraer EMB 175 (E7W) 2:50 Effective 2025-07-27 through 2025-07-31 Codeshare flight, operated by Delta Air Lines.(DL 3593)
Mon-Fri,Sun 14:38 Ontario, Los Angeles (ONT) 2 17:22 Seattle-Tacoma (SEA) WestJet WS 8153 Non-stop Embraer EMB 175 (E7W) 2:44 Effective 2025-07-11 through 2025-07-18 Codeshare flight, operated by Delta Air Lines.(DL 3589)
Mon-Thu,Sat,Sun 14:38 Ontario, Los Angeles (ONT) 2 17:22 Seattle-Tacoma (SEA) WestJet WS 8153 Non-stop Embraer EMB 175 (E7W) 2:44 Effective 2025-07-19 through 2025-07-24 Codeshare flight, operated by Delta Air Lines.(DL 3589)
Mon,Tue,Fri 07:00 Ontario, Los Angeles (ONT) 2 09:49 Seattle-Tacoma (SEA) WestJet WS 8155 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-07-18 through 2025-07-22 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Daily 14:38 Ontario, Los Angeles (ONT) 2 17:22 Seattle-Tacoma (SEA) WestJet WS 8209 Non-stop Embraer EMB 175 (E7W) 2:44 Effective 2025-07-25 through 2025-08-03 Codeshare flight, operated by Delta Air Lines.(DL 3589)
Tue-Thu,Sat 14:38 Ontario, Los Angeles (ONT) 2 17:22 Seattle-Tacoma (SEA) WestJet WS 8209 Non-stop Embraer EMB 175 (E7W) 2:44 Effective 2025-08-05 through 2025-08-09 Codeshare flight, operated by Delta Air Lines.(DL 3589)
Mon,Tue,Thu,Fri,Sun 07:00 Ontario, Los Angeles (ONT) 2 09:49 Seattle-Tacoma (SEA) WestJet WS 8210 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-07-25 through 2025-07-31 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Tue,Sat 07:00 Ontario, Los Angeles (ONT) 2 09:49 Seattle-Tacoma (SEA) WestJet WS 8210 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-08-02 through 2025-08-05 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Mon,Fri 11:29 Ontario, Los Angeles (ONT) 2 14:19 Seattle-Tacoma (SEA) WestJet WS 8211 Non-stop Embraer EMB 175 (E7W) 2:50 Effective 2025-07-25 through 2025-07-28 Codeshare flight, operated by Delta Air Lines.(DL 3593)
Mon 14:38 Ontario, Los Angeles (ONT) 2 17:22 Seattle-Tacoma (SEA) WestJet WS 8279 Non-stop Embraer EMB 175 (E7W) 2:44 Operates only on 2025-08-04 Codeshare flight, operated by Delta Air Lines.(DL 3589)
Mon,Wed-Fri,Sun 07:00 Ontario, Los Angeles (ONT) 2 09:49 Seattle-Tacoma (SEA) WestJet WS 8280 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-08-01 through 2025-08-07 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Tue-Thu,Sat,Sun 07:00 Ontario, Los Angeles (ONT) 2 09:49 Seattle-Tacoma (SEA) WestJet WS 8280 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-08-09 through 2025-09-04 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Fri-Sun 07:00 Ontario, Los Angeles (ONT) 2 09:49 Seattle-Tacoma (SEA) WestJet WS 8280 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-09-05 through 2025-09-07 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Daily 07:00 Ontario, Los Angeles (ONT) 2 10:02 Seattle-Tacoma (SEA) WestJet WS 8280 Non-stop Embraer EMB 175 (E7W) 3:02 Effective 2025-09-08 through 2025-12-19 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Mon,Thu,Fri,Sun 11:29 Ontario, Los Angeles (ONT) 2 14:19 Seattle-Tacoma (SEA) WestJet WS 8287 Non-stop Embraer EMB 175 (E7W) 2:50 Effective 2025-08-01 through 2025-08-07 Codeshare flight, operated by Delta Air Lines.(DL 3593)
Mon,Fri 07:00 Ontario, Los Angeles (ONT) 2 09:49 Seattle-Tacoma (SEA) WestJet WS 8340 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-08-15 through 2025-09-01 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Daily 11:29 Ontario, Los Angeles (ONT) 2 14:13 Seattle-Tacoma (SEA) WestJet WS 8390 Non-stop Embraer EMB 175 (E7W) 2:44 Effective 2025-08-11 through 2025-09-03 Codeshare flight, operated by Delta Air Lines.(DL 3589)
Fri,Sun 14:38 Ontario, Los Angeles (ONT) 2 17:22 Seattle-Tacoma (SEA) WestJet WS 8390 Non-stop Embraer EMB 175 (E7W) 2:44 Effective 2025-08-08 through 2025-08-10 Codeshare flight, operated by Delta Air Lines.(DL 3589)
Mon,Fri 07:00 Ontario, Los Angeles (ONT) 2 09:49 Seattle-Tacoma (SEA) WestJet WS 8395 Non-stop Embraer EMB 175 (E7W) 2:49 Effective 2025-08-08 through 2025-08-11 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Fri,Sun 11:29 Ontario, Los Angeles (ONT) 2 14:19 Seattle-Tacoma (SEA) WestJet WS 8396 Non-stop Embraer EMB 175 (E7W) 2:50 Effective 2025-08-08 through 2025-08-10 Codeshare flight, operated by Delta Air Lines.(DL 3593)
Mon,Thu-Sun 11:29 Ontario, Los Angeles (ONT) 2 14:28 Seattle-Tacoma (SEA) WestJet WS 8396 Non-stop Embraer EMB 175 (E7W) 2:59 Effective 2025-09-08 through 2025-09-15 Codeshare flight, operated by Delta Air Lines.(DL 4070)
Mon,Tue,Thu-Sun 11:29 Ontario, Los Angeles (ONT) 2 14:28 Seattle-Tacoma (SEA) WestJet WS 8396 Non-stop Embraer EMB 175 (E7W) 2:59 Effective 2025-09-16 through 2025-10-07 Codeshare flight, operated by Delta Air Lines.(DL 4070)
Daily 11:29 Ontario, Los Angeles (ONT) 2 14:28 Seattle-Tacoma (SEA) WestJet WS 8396 Non-stop Embraer EMB 175 (E7W) 2:59 Effective 2025-10-08 through 2025-12-19 Codeshare flight, operated by Delta Air Lines.(DL 4070)
Daily 11:29 Ontario, Los Angeles (ONT) 2 14:28 Seattle-Tacoma (SEA) WestJet WS 8396 Non-stop Embraer EMB 175 (E7W) 2:59 Effective from 2026-01-06 Codeshare flight, operated by Delta Air Lines.(DL 4070)
Wed 06:00 Ontario, Los Angeles (ONT) 2 08:55 Seattle-Tacoma (SEA) WestJet WS 8434 Non-stop Embraer EMB 175 (E7W) 2:55 Effective 2025-05-07 through 2025-05-21 Codeshare flight, operated by Delta Air Lines.(DL 4042)
Fri 11:45 Ontario, Los Angeles (ONT) 2 14:40 Seattle-Tacoma (SEA) WestJet WS 8695 Non-stop Embraer EMB 175 (E7W) 2:55 Operates only on 2025-05-02 Codeshare flight, operated by Delta Air Lines.(DL 4070)

1 2 3 ... 7 8 9 10

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 2:36 and 3:04.

Return (SEA-ONT) flights

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All airlines flying from Ontario, Los Angeles (ONT) to Seattle-Tacoma (SEA).

FLIGHT SCHEDULE

Direct Codeshare Flights:

WestJet WS8152

11:29

Ontario, Los Angeles (ONT) 2

14:19

Seattle-Tacoma (SEA)

Effective 2025-07-07 through 2025-07-24

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 3593)

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

WestJet WS8152

11:29

Ontario, Los Angeles (ONT) 2

14:19

Seattle-Tacoma (SEA)

Effective 2025-07-27 through 2025-07-31

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 3593)

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

WestJet WS8153

14:38

Ontario, Los Angeles (ONT) 2

17:22

Seattle-Tacoma (SEA)

Effective 2025-07-11 through 2025-07-18

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 3589)

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

WestJet WS8153

14:38

Ontario, Los Angeles (ONT) 2

17:22

Seattle-Tacoma (SEA)

Effective 2025-07-19 through 2025-07-24

Mon

Tue

Wed

Thu

Fri
-

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 3589)

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

WestJet WS8155

07:00

Ontario, Los Angeles (ONT) 2

09:49

Seattle-Tacoma (SEA)

Effective 2025-07-18 through 2025-07-22

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8209

14:38

Ontario, Los Angeles (ONT) 2

17:22

Seattle-Tacoma (SEA)

Effective 2025-07-25 through 2025-08-03

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 3589)

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

WestJet WS8209

14:38

Ontario, Los Angeles (ONT) 2

17:22

Seattle-Tacoma (SEA)

Effective 2025-08-05 through 2025-08-09

Mon
-

Tue

Wed

Thu

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 3589)

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

WestJet WS8210

07:00

Ontario, Los Angeles (ONT) 2

09:49

Seattle-Tacoma (SEA)

Effective 2025-07-25 through 2025-07-31

Mon

Tue

Wed
-

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8210

07:00

Ontario, Los Angeles (ONT) 2

09:49

Seattle-Tacoma (SEA)

Effective 2025-08-02 through 2025-08-05

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8211

11:29

Ontario, Los Angeles (ONT) 2

14:19

Seattle-Tacoma (SEA)

Effective 2025-07-25 through 2025-07-28

Mon

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 3593)

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

WestJet WS8279

14:38

Ontario, Los Angeles (ONT) 2

17:22

Seattle-Tacoma (SEA)

Operates only on 2025-08-04

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 3589)

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

WestJet WS8280

07:00

Ontario, Los Angeles (ONT) 2

09:49

Seattle-Tacoma (SEA)

Effective 2025-08-01 through 2025-08-07

Mon

Tue
-

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8280

07:00

Ontario, Los Angeles (ONT) 2

09:49

Seattle-Tacoma (SEA)

Effective 2025-08-09 through 2025-09-04

Mon
-

Tue

Wed

Thu

Fri
-

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8280

07:00

Ontario, Los Angeles (ONT) 2

09:49

Seattle-Tacoma (SEA)

Effective 2025-09-05 through 2025-09-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8280

07:00

Ontario, Los Angeles (ONT) 2

10:02

Seattle-Tacoma (SEA)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8287

11:29

Ontario, Los Angeles (ONT) 2

14:19

Seattle-Tacoma (SEA)

Effective 2025-08-01 through 2025-08-07

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 3593)

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

WestJet WS8340

07:00

Ontario, Los Angeles (ONT) 2

09:49

Seattle-Tacoma (SEA)

Effective 2025-08-15 through 2025-09-01

Mon

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8390

11:29

Ontario, Los Angeles (ONT) 2

14:13

Seattle-Tacoma (SEA)

Effective 2025-08-11 through 2025-09-03

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 3589)

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

WestJet WS8390

14:38

Ontario, Los Angeles (ONT) 2

17:22

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 3589)

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

WestJet WS8395

07:00

Ontario, Los Angeles (ONT) 2

09:49

Seattle-Tacoma (SEA)

Effective 2025-08-08 through 2025-08-11

Mon

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8396

11:29

Ontario, Los Angeles (ONT) 2

14:19

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 3593)

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

WestJet WS8396

11:29

Ontario, Los Angeles (ONT) 2

14:28

Seattle-Tacoma (SEA)

Effective 2025-09-08 through 2025-09-15

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 4070)

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

WestJet WS8396

11:29

Ontario, Los Angeles (ONT) 2

14:28

Seattle-Tacoma (SEA)

Effective 2025-09-16 through 2025-10-07

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 4070)

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

WestJet WS8396

11:29

Ontario, Los Angeles (ONT) 2

14:28

Seattle-Tacoma (SEA)

Effective 2025-10-08 through 2025-12-19

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 4070)

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

WestJet WS8396

11:29

Ontario, Los Angeles (ONT) 2

14:28

Seattle-Tacoma (SEA)

Effective from 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 4070)

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

WestJet WS8434

06:00

Ontario, Los Angeles (ONT) 2

08:55

Seattle-Tacoma (SEA)

Effective 2025-05-07 through 2025-05-21

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 4042)

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

WestJet WS8695

11:45

Ontario, Los Angeles (ONT) 2

14:40

Seattle-Tacoma (SEA)

Operates only on 2025-05-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 4070)

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

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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 2:36 and 3:04.

Return (SEA-ONT) flights

Feedback - Disclaimer - Privacy