Southwest Airlines Ontario to Seattle Flights

Return flight: Seattle – Ontario

Cheapflightsplus.com will find cheap Southwest Airlines flights from Ontario to Seattle. Compare airline ticket prices and book air tickets starting from $83 from trusted online travel agencies, web sites and directly from airlines. Check flights schedule of Southwest Airlines, arrivals and departure details below.

Find Cheap Airfare Ontario (CA) — Seattle (WA) by Southwest Airlines

To find cheap tickets choose a day of your departure with attractive price on the graph below and click «Find flights». For round trip flights please click «Check prices for return flight». The cheapest airfare is in may: one-way - $83, two-way – $142.
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Below is a detailed 2024 flight schedule for today, tomorrow and all other days. It may vary depending on season and a day of the week of your desired trip. We recommend booking your itinerary at least 2 weeks prior your travel to get the best price and availability by the airline.
Departure Arrival Flight Details Flight Time Price
10:00 am — 3:35 pm
10:00 am — 11:00 am WN2505 Southwest Airlines
Ontario — Las Vegas
1h 55m stop
12:55 pm — 3:35 pm WN2521 Southwest Airlines
Las Vegas — Seattle
5h 35m
including layover
Find flight
from$145
10:00 am — 2:00 pm
10:00 am — 11:25 am WN4875 Southwest Airlines
Ontario — Sacramento
35m stop
12:00 pm — 2:00 pm WN2703 Southwest Airlines
Sacramento — Seattle
4h
including layover
Find flight
from$163
11:15 am — 5:40 pm
11:15 am — 12:25 pm WN1368 Southwest Airlines
Ontario — Phoenix
2h 15m stop
2:40 pm — 5:40 pm WN1565 Southwest Airlines
Phoenix — Seattle
6h 25m
including layover
Find flight
from$108
11:15 am — 5:35 pm
11:15 am — 12:25 pm WN1368 Southwest Airlines
Ontario — Phoenix
2h 10m stop
2:35 pm — 5:35 pm WN1281 Southwest Airlines
Phoenix — Seattle
6h 20m
including layover
Find flight
from$174
12:10 pm — 3:50 pm
12:10 pm — 1:25 pm WN2013 Southwest Airlines
Ontario — Sacramento
35m stop
2:00 pm — 3:50 pm WN2013 Southwest Airlines
Sacramento — Seattle
3h 40m
including layover
Find flight
from$83
12:10 pm — 5:25 pm
12:10 pm — 1:25 pm WN2013 Southwest Airlines
Ontario — Sacramento
2h 5m stop
3:30 pm — 5:25 pm WN1159 Southwest Airlines
Sacramento — Seattle
5h 15m
including layover
Find flight
from$86
1:15 pm — 6:35 pm
1:15 pm — 2:25 pm WN1316 Southwest Airlines
Ontario — San Jose
2h stop
4:25 pm — 6:35 pm WN102 Southwest Airlines
San Jose — Seattle
5h 20m
including layover
Find flight
from$86
1:50 pm — 7:35 pm
1:50 pm — 3:00 pm WN2284 Southwest Airlines
Ontario — Oakland
2h 30m stop
5:30 pm — 7:35 pm WN785 Southwest Airlines
Oakland — Seattle
5h 45m
including layover
Find flight
from$86
2:00 pm — 8:40 pm
2:00 pm — 3:25 pm WN4813 Southwest Airlines
Ontario — Sacramento
3h 15m stop
6:40 pm — 8:40 pm WN4842 Southwest Airlines
Sacramento — Seattle
6h 40m
including layover
Find flight
from$165
2:30 pm — 8:20 pm
2:30 pm — 3:50 pm WN4092 Southwest Airlines
Ontario — Oakland
2h 15m stop
6:05 pm — 8:20 pm WN4096 Southwest Airlines
Oakland — Seattle
5h 50m
including layover
Find flight
from$163
3:00 pm — 9:40 pm
3:00 pm — 6:10 pm WN1369 Southwest Airlines
Ontario — Denver
1h 35m stop
7:45 pm — 9:40 pm WN478 Southwest Airlines
Denver — Seattle
6h 40m
including layover
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from$92
3:00 pm — 9:40 pm
3:00 pm — 6:10 pm WN1645 Southwest Airlines
Ontario — Denver
1h 35m stop
7:45 pm — 9:40 pm WN478 Southwest Airlines
Denver — Seattle
6h 40m
including layover
Find flight
from$174
4:30 pm — 10:00 pm
4:30 pm — 5:45 pm WN595 Southwest Airlines
Ontario — Oakland
2h 10m stop
7:55 pm — 10:00 pm WN1298 Southwest Airlines
Oakland — Seattle
5h 30m
including layover
Find flight
from$106
4:55 pm — 10:05 pm
4:55 pm — 6:10 pm WN1491 Southwest Airlines
Ontario — Phoenix
55m stop
7:05 pm — 10:05 pm WN1383 Southwest Airlines
Phoenix — Seattle
5h 10m
including layover
Find flight
from$92
5:55 pm — 10:05 pm
5:55 pm — 7:15 pm WN246 Southwest Airlines
Ontario — Oakland
45m stop
8:00 pm — 10:05 pm WN1231 Southwest Airlines
Oakland — Seattle
4h 10m
including layover
Find flight
from$101
6:35 am — 11:25 am
6:35 am — 8:00 am WN1474 Southwest Airlines
Ontario — Sacramento
1h 30m stop
9:30 am — 11:25 am WN1782 Southwest Airlines
Sacramento — Seattle
4h 50m
including layover
Find flight
from$86
6:40 pm — 10:30 pm
6:40 pm — 8:00 pm WN1713 Southwest Airlines
Ontario — Sacramento
35m stop
8:35 pm — 10:30 pm WN687 Southwest Airlines
Sacramento — Seattle
3h 50m
including layover
Find flight
from$86
7:25 pm — 11:35 pm
7:25 pm — 8:40 pm WN5709 Southwest Airlines
Ontario — Oakland
50m stop
9:30 pm — 11:35 pm WN982 Southwest Airlines
Oakland — Seattle
4h 10m
including layover
Find flight
from$136
8:45 am — 1:00 pm
8:45 am — 10:00 am WN1540 Southwest Airlines
Ontario — Oakland
50m stop
10:50 am — 1:00 pm WN1381 Southwest Airlines
Oakland — Seattle
4h 15m
including layover
Find flight
from$121
8:55 am — 2:30 pm
8:55 am — 10:15 am WN1856 Southwest Airlines
Ontario — Sacramento
2h 20m stop
12:35 pm — 2:30 pm WN1996 Southwest Airlines
Sacramento — Seattle
5h 35m
including layover
Find flight
from$86
9:05 am — 2:15 pm
9:05 am — 10:25 am WN1762 Southwest Airlines
Ontario — Sacramento
1h 50m stop
12:15 pm — 2:15 pm WN1128 Southwest Airlines
Sacramento — Seattle
5h 10m
including layover
Find flight
from$92
5:50 pm — 9:02 am
+1 day
5:50 pm — 6:55 pm WN4465 Southwest Airlines
Ontario — Las Vegas
55m stop
7:50 pm — 10:40 pm WN2877 Southwest Airlines
Las Vegas — Denver
8h 20m stop
7:00 am — 9:02 am AS1171 Alaska Airlines
Denver — Seattle
15h 12m
including layover
Find flight
from$151
7:05 pm — 0:01 am
+2 days
7:05 pm — 8:15 pm WN450 Southwest Airlines
Ontario — San Jose
9h 15m stop
5:30 am — 9:04 am UA5663 United Airlines
San Jose — Denver
12h 57m stop
10:01 pm — 0:01 am F9143 Frontier Airlines
Denver — Seattle
28h 56m
including layover
Find flight
from$243
*Departure and arrival times are local. Last updated on 05/18/2024

Flight Information

There are 68 flights by Southwest Airlines from Ontario to Seattle every week with departures from Ontario Int. and International Heliport. All flights arrive at Seattle-Tacoma Intl, Boeing Field International Airport, Kenmore Air Harbor SPB.

Departures start from 10:00 am to 9:05 am. Nonstop flight is 3h 40m. The time difference between Ontario and Seattle is 0h.

  • The fastest flight 3h 40m
  • Average flight time 6h 40m
  • The earliest flight 10:00 am
  • The latest flight 9:05 am
  • Distance 957 ml

The cheapest flight by Southwest Airlines that our users were able to find is $83. This airfare is economy class on one-way WN2013 flight for October 4, 2018 leaving Ontario Int. in Ontario at 12:10 pm, it includes all taxes and additional fees.

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Other Popular Airlines on the Route

Besides Southwest Airlines there are other 6 airline carriers between Ontario and Seattle. Please review schedules and prices from the most popular airlines to find the best airfare deals from Ontario to Seattle.

Nonstop flights

There are 7 direct flights every day from Ontario. Airlines and fares are below:

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Connecting Flights

List of flights with layovers (1 and more stops):

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How to book an air ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected airfare.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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