Cheap Flights from Ontario to Seattle Starting at $46
Helping travelers to find the best flight offers
Cheapest flights from Ontario to Seattle
Cheapest one way flight
$46
Frontier Airlines
Direct flight
2h 55m
06/03/2025
The cheapest one-way flight from Ontario to Seattle departs on 06/03/2025, is operated by Frontier Airlines and costs $46
Cheapest round trip flight
$120
Frontier Airlines
Direct flight
5h 38m
05/15/2025
The cheapest roundtrip flight from Ontario to Seattle departs on 05/15/2025, is operated by Frontier Airlines and costs $120
The fastest flight
2h 46m
Fastest flight from Ontario to Seattle takes 2h 46m
Direct flights
Several times a week
There are direct flights on this route 5 days a week: Su, Tu, We, Fr, and Sa
Earliest flight
5:40 AM
Latest flight
7:17 PM
Direct flights count
70
Distance
1557km
Timezone difference
0h
The distance between Ontario and Seattle is 1557km (965 miles).There are 70 direct flights from Ontario to Seattle.Ontario and Seattle are in the same time zone.Flights from Ontario begin at 5:40 AM.The latest flight from Ontario departs at 7:17 PM.
Remember that on average the ideal time to book flights is 2 months before departure!
Schedule of direct flights from Ontario to Seattle
A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Ontario to Seattle:
Ontario airports overview
Seattle airports overview
Frequently asked questions (FAQ)
Answers to questions about the route that travelers are most interested in.
Special offers and sales on air tickets from Ontario to Seattle
We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.
Alternative routes
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Los Angeles — Seattle
LAX — SEA
04/17/2025
Departure date
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05/16/2025
Departure date
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AS369
Starting at $80
Los Angeles — Seattle
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04/18/2025
Departure date
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AS4960
Starting at $325
Los Angeles — Seattle
LAX — SEA
04/19/2025
Departure date
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AA6225
Starting at $186
Los Angeles — Seattle
LAX — SEA
04/26/2025
Departure date
Direct flight
F91177
Starting at $100
Los Angeles — Seattle
LAX — SEA
04/27/2025
Departure date
Direct flight
F91177
Starting at $102
Los Angeles — Seattle
LAX — SEA
05/02/2025
Departure date
Direct flight
AA6225
Starting at $142
Los Angeles — Seattle
LAX — SEA
05/03/2025
Departure date
Direct flight
F91177
Starting at $50
Los Angeles — Seattle
LAX — SEA
05/06/2025
Departure date
Direct flight
F91177
Starting at $151
Los Angeles — Seattle
LAX — SEA
05/30/2025
Departure date
Direct flight
AS1301
Starting at $74
Unable to find information about the schedule of direct flights from
How much is the cheapest flight ticket from Ontario to Seattle?
The cheapest flight ticket from Ontario to Seattle according to data for the last 48 hours costs $46
When is the best time to buy air tickets on the route Ontario — Seattle?
Often the best time to buy tickets from Ontario to Seattle is 2 months before departure.
When is the cheapest time of year to fly from Ontario to Seattle?
Based on statistics over the past years, the lowest prices for flights from Ontario to Seattle can be found flying in these months: April, May, August.
How long does it take to fly from Ontario to Seattle?
The fastest flights from Ontario to Seattle start from 2 hours 46 minutes in the air.
Which airline can fly direct from Ontario to Seattle?
The following airlines operate direct flights on the route Ontario — Seattle: United Airlines, Alaska Airlines, American Airlines
Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from Ontario to Seattle. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
We carefully collect statistics on the search and pricing of airlines and, based on these data, we make an assumption about future prices. Thus, you can better understand which season is the cheapest to fly from Ontario to Seattle
Below you will find a list of airlines operating flights on the Ontario — Seattle route and the starting prices for flights of each specific airline on it.
A direct flight is the most convenient and comfortable way to fly from Ontario to Seattle, despite the fact that sometimes flights with transfers can cost significantly less.
