starting at $98
starting at $196
starting at $71
starting at $96
starting at $150
Compare airlines, prices, and flight durations for your trip
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.
A non-stop 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.
A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Ontario to Seattle:
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Answers to questions about the route that travelers are most interested in.
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.
More than 5 airlines operate flights from Ontario to Seattle, including Alaska Airlines, Grumeti Air, Spirit Airlines, Frontier Airlines, and Southwest Airlines. This is a popular route, so passengers can choose tickets based on budget and preferences. Ticket prices start from $71, and our service lets you instantly compare all options. The variety of offers simplifies planning: you can choose budget fares or more comfortable options with baggage included or extra services. We help you find the best deals so your trip is cost-efficient.
starting at $98
starting at $196
starting at $71
starting at $96
starting at $150
Los Angeles — Seattle
01/13/2026
Departure
Direct flight
AS548
starting at $219
Los Angeles — Seattle
01/10/2026
Departure
Direct flight
0G6194
starting at $329
Los Angeles — Seattle
01/11/2026
Departure
Direct flight
0G6204
starting at $312
Los Angeles — Seattle
02/09/2026
Departure
Direct flight
AS703
starting at $98
Ontario — Seattle
01/18/2026
Departure
Direct flight
0G6371
starting at $196
Unable to find information about the schedule of direct flights from
The cheapest one-way flight from Ontario to Seattle departs on 02/10/2026, is operated by Spirit Airlines and costs $71
The cheapest roundtrip flight from Ontario to Seattle departs on 03/09/2026, is operated by Frontier Airlines and costs $79
Fastest flight from Ontario to Seattle takes 2h 53m
There are direct flights on this route 4 days a week: Su, Mo, Tu, and Sa
The distance between Ontario and Seattle is 1557km (965 miles). There are 72 direct flights from Ontario to Seattle. Ontario and Seattle are in the same time zone. Flights from Ontario begin at 6:00 AM. The latest flight from Ontario departs at 7:43 PM
The cheapest flight ticket from Ontario to Seattle according to data for the last 48 hours costs $71
Often the best time to buy tickets from Ontario to Seattle is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Ontario to Seattle can be found flying in these months: February, August, January.
The fastest flights from Ontario to Seattle start from 2 hours 53 minutes in the air.
The following airlines operate direct flights on the route Ontario — Seattle: Alaska Airlines, Grumeti Air
The cost of a one-way flight from Ontario to Seattle ranges from $80 (February 2026) to $146 (January 2026). On average, the ticket price is about $122–$285.
We couldn't find any special offers for flights from Ontario to Seattle