Ontario (ONT) to Seattle (SEA) Flight Schedule

Flight Ontario(ONT) to Seattle(SEA)
CHANGE DIRECTION

LA/Ontario International Airport Seattle-Tacoma International Airport
ONT : Ontario , United States SEA : Seattle , United States
UTC-7(DST) UTC-7(DST)

Ontario to Seattle Flight Schedule(September 2025)

Flight from Ontario(ONT) to Seattle(SEA) is operated by 4 airlines : Alaska Airlines (AS),Delta Air Lines (DL),Southwest Airlines (WN),Frontier Airlines (F9). You can check flight schedules, flight duration, and aircraft types.

Change Direction(SEA to ONT)

Ontario (ONT) to Seattle (SEA) Flight Schedule

LastUpdate : 2025/09/01 06:00

Flight Schedule on September 2025 , Direct flight departure from Ontario with all airlines , flight number, flight duration, aircraft type.

September 2025
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  • Alaska Airlines [ Show / Hide ]
  • Delta Air Lines [ Show / Hide ]
  • Southwest Airlines [ Show / Hide ]
  • Frontier Airlines [ Show / Hide ]
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Change Direction(SEA to ONT)
Flight Number / Airline Departure Time Arrival Time Flight Duration Operating Days Aircraft Type Airfare / Tickets
AS1091
Alaska Airlines 		06:00 08:45 2h45m
MT----- (Sep 1–2)
737-900 (WL) Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
06:00 08:45 2h45m
--WT--- (Sep 3–4)
737-9-MAX
06:00 08:45 2h45m
M---FSS (Sep 5–8, Sep 13)
737-900 (WL)
06:00 08:45 2h45m
-TWT--- (Sep 9–11)
737-9-MAX
06:00 08:45 2h45m
----F-- (Sep 12)
737-900 (WL)
06:00 08:45 2h45m
------S (Sep 14)
737-9-MAX
06:00 08:45 2h45m
MT--FS- (Sep 15–16, Sep 19–20)
737-900 (WL)
06:00 08:45 2h45m
--WT--- (Sep 17–18)
737-9-MAX
06:00 08:45 2h45m
-----S- (Sep 20)
737-900 (WL)
06:00 08:45 2h45m
------S (Sep 21)
737-9-MAX
06:00 08:45 2h45m
M------ (Sep 22)
737-900 (WL)
06:00 08:45 2h45m
-TWT--- (Sep 23–25)
737-9-MAX
06:00 08:45 2h45m
MT--F-S (Sep 26, Sep 28–30)
737-900 (WL)
Codeshare flight ▼
DL4042
Delta Air Lines 		06:00 08:48 2h48m
Daily (Sep 1–10)
E175 (WL) Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
06:00 08:54 2h54m
Daily (Sep 11–30)
E175 (WL)
Codeshare flight ▼
F93164
Frontier Airlines 		09:40 12:25 2h45m
M------ (Sep 1)
A321neo Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
08:13 11:11 2h58m
M--TF-S (Sep 4–5, Sep 7–8, Sep 11–12, Sep 14)
A320neo
08:43 11:41 2h58m
M---F-- (Sep 15, Sep 19, Sep 22, Sep 26, Sep 29)
A320neo
08:13 11:11 2h58m
---T--S (Sep 18, Sep 21, Sep 25, Sep 28)
A320neo
Codeshare flight ▼
AS1111
Alaska Airlines 		11:39 14:19 2h40m
M------ (Sep 1)
737-900 (WL) Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
11:39 14:22 2h43m
-T--F-- (Sep 2, Sep 5)
737-800 (WL)
11:39 14:19 2h40m
---T--- (Sep 4)
737-900 (WL)
11:39 14:22 2h43m
-----S- (Sep 6)
737-700
11:39 14:19 2h40m
MT----- (Sep 8–9, Sep 15)
737-900 (WL)
11:39 14:22 2h43m
--W---S (Sep 10, Sep 14)
737-700
11:39 14:22 2h43m
---T--- (Sep 11)
737-800 (WL)
11:39 14:22 2h43m
----F-- (Sep 12)
737-9-MAX
11:39 14:21 2h42m
-----S- (Sep 13)
737-700
11:39 14:19 2h40m
M--T--- (Sep 15, Sep 18)
737-900 (WL)
11:39 14:22 2h43m
--W-F-- (Sep 17, Sep 19, Sep 24)
737-800 (WL)
11:39 14:19 2h40m
-----S- (Sep 20)
737-900 (WL)
11:39 14:22 2h43m
------S (Sep 21)
737-700
11:39 14:19 2h40m
MT----- (Sep 22–23, Sep 29–30)
737-900 (WL)
11:39 14:22 2h43m
---T--- (Sep 25)
737-9-MAX
11:39 14:22 2h43m
----F-- (Sep 26)
737-700
11:39 14:19 2h40m
-----S- (Sep 27)
737-9-MAX
11:39 14:22 2h43m
------S (Sep 28)
737-900 (WL)
Codeshare flight ▼
DL1566
Delta Air Lines 		11:40 14:25 2h45m
-TWTFSS (Sep 2–7, Sep 9–10)
A220-100 Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
Codeshare flight ▼
DL4096
Delta Air Lines 		11:50 14:45 2h55m
Daily (Sep 11–30)
E175 (WL) Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
Codeshare flight ▼
DL3697
Delta Air Lines 		12:00 14:45 2h45m
M------ (Sep 1, Sep 8)
E175 (WL) Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
Codeshare flight ▼
AS1119
Alaska Airlines 		15:06 17:46 2h40m
MTWTFS- (Sep 1–6)
737-900 (WL) Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
15:06 17:46 2h40m
------S (Sep 7)
737-9-MAX
15:06 17:46 2h40m
Daily (Sep 8–14)
737-900 (WL)
15:06 17:46 2h40m
MT----- (Sep 15–16)
737-9-MAX
15:06 17:46 2h40m
Daily (Sep 17–30)
737-900 (WL)
Codeshare flight ▼
F92275
Frontier Airlines 		17:03 19:53 2h50m
-T----- (Sep 2)
A320neo Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
Codeshare flight ▼
DL4031
Delta Air Lines 		18:05 20:50 2h45m
MTWT--- (Sep 1–2, Sep 4, Sep 8–10)
E175 (WL) Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
17:40 20:31 2h51m
Daily (Sep 11–30)
E175 (WL)
Codeshare flight ▼
AS1087
Alaska Airlines 		19:47 22:37 2h50m
M------ (Sep 1)
737-900 (WL) Trip.com PRICES HIS Prices Expedia PRICES skyticket PRICES
19:40 22:30 2h50m
---T--- (Sep 4)
737-900 (WL)
19:40 22:30 2h50m
----F-S (Sep 5, Sep 7, Sep 12, Sep 14, Sep 19, Sep 21, Sep 26, Sep 28)
737-700
19:47 22:37 2h50m
M------ (Sep 8)
737-900 (WL)
19:40 22:30 2h50m
---T--- (Sep 11)
737-800 (WL)
19:47 22:37 2h50m
M------ (Sep 15, Sep 22)
737-900 (WL)
19:40 22:30 2h50m
---T--- (Sep 25)
737-700
19:47 22:37 2h50m
M------ (Sep 29)
737-900 (WL)
Codeshare flight ▼
Change Direction(SEA to ONT)
Flight schedules as of September 01, 2025, 06:00 AM(OAG data). Schedules may change without notice, so please check with airlines before booking. Refer to FlyTeam's terms of use before proceeding. Some airlines and flight numbers may not be displayed.

FAQ : Ontario to Seattle

How many airlines fly from Ontario to Seattle ?
As of September 2025, 4 airlines operate direct flights from Ontario (ONT) to Seattle (SEA) : Alaska Airlines , Delta Air Lines , Southwest Airlines , Frontier Airlines.
How far is it from Ontario to Seattle?
The distance between Ontario (ONT) to Seattle (SEA) is approximately 960 miles(1,540km) by air.
What is the time difference between Ontario to Seattle?
There is no time difference between LA/Ontario International Airport(Ontario) and Seattle-Tacoma International Airport(Seattle).Ontario is currently observing daylight saving time (DST) from March 9, 2025 to November 2, 2025.Seattle is currently observing daylight saving time (DST) from March 9, 2025 to November 2, 2025.