Cheap Flights from Ontario, CA to Seattle, WA from $164
On Cheapflightsplus.com you will find 3 direct and 24 connecting flights from Ontario to Seattle. You can compare airfare deals from 4 airlines and multiple travel sites from $164, book and save on cheap plane tickets and last minute offers. Also check out ONT-SEA flight schedule to find best flight time, convenient departure and arrival airports.
Flight Information
Below we will explain in detail what the flights cost on the destination from Ontario to Seattle depends on and how to choose the most interesting flight option for you.
Distance between Ontario and Seattle is 1540 miles. Time difference between the cities is 0h. Airplanes depart 06:00 to 23:59 from 2 Ontario airports and arrive 06:00 to 23:59 to 3 Seattle airports. Average flight time is 2h 51m.
- The fastest flight 2h 51m
- Average flight time 2h 51m
- The earliest flight 06:00
- The latest flight 23:59
- Distance 957 ml
Best Flights from Ontario to Seattle Today
| Price | Departure | Arrival | Flight Duration | Airline | Flight |
|---|---|---|---|---|---|
| from $164 | 14:45 Ontario Ontario Int. | 17:38 Seattle Seattle-Tacoma Intl | 2h 53m | Frontier Airlines | F92275 |
| from $314 | 19:19 Ontario Ontario Int. | 22:10 Seattle Seattle-Tacoma Intl | 2h 51m | Hawaiian Airlines | HA6358 |
| from $319 | 19:19 Ontario Ontario Int. | 22:10 Seattle Seattle-Tacoma Intl | 2h 51m | Alaska Airlines | AS594 |
| from $166 | 18:00 Ontario Ontario Int. | 17:51+1 день Seattle Seattle-Tacoma Intl | 23h 51m layover 19h 49m - Las Vegas | Frontier Airlines | F94758 F94667 |
| from $619 | 18:39 Ontario Ontario Int. | 00:59+1 день Seattle Seattle-Tacoma Intl | 6h 20m layover 2h 38m - San Francisco | United Airlines | UA698 UA2462 |
The cheapest months to travel to Seattle are january (from 164 $).
What is the lowest airfare Ontario to Seattle?
The cheapest plane ticket found by our users is $164. This airfare is for economy class on one-way F92275 flight by Frontier Airlines for January 5, 2026 which leaves Ontario Int. in Ontario at 14:45 am and arrives at Seattle Seattle-Tacoma Intl at 17:38.
Flight Schedule Ontario (California) to Seattle (Washington)
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Popular Airlines on the Route
The flight Ontario — Seattle is served by 4 regular airlines and 1 low-cost airline. Most of the flights on this route are operated by Alaska Airlines - 1 departures per week at the price of from $ 319 . And the most expensive tickets are offered by United Airlines airline - from $ 1237.
Direct flights
There are 3 nonstop flights on the route. The fastest direct flight is HA6358 by Hawaiian Airlines takes 2h 51m and the cheapest is F92275 by Frontier Airlines for $164.
- AS - Alaska Airlinesfrom $319Find
- F9 - Frontier Airlinesfrom $164Find
- HA - Hawaiian Airlinesfrom $314Find
Connecting Flights
There are 24 flights with layovers on the route. The fastest connecting flight is UA698 by United Airlines takes 6h 20m and the cheapest is F92275 by Frontier Airlines for $166.
- F9 - Frontier Airlinesfrom $166Find
- UA - United Airlinesfrom $619Find
Airports
You can fly from Ontario to Seattle from 2 airports (Ontario Int., International Heliport).
Ontario airports
- Ontario Int.-ONTfrom $164Find
- International Heliport-JIOFind
Seattle airports
- Boeing Field International Airport-BFIFind
- Seattle-Tacoma Intl-SEAFind
- Kenmore Air Harbor SPB-LKEFind
Airplanes
There are flights to Seattle from Ontario by 4 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.
Top Domestic Destinations from Ontario
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Top International Destinations from Ontario
Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.
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How to book a plane 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 flight ticket.
- 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.
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