Unable to find information about the schedule of direct flights from
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A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Seattle to Ontario:
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Answers to questions about the route that travelers are most interested in.
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Unable to find information about the schedule of direct flights from
The minimum one-way ticket price from Seattle to Ontario is $69 (March 2026), while the maximum is $1,355 (November 2026). On average, a ticket costs $499–$1,427.
Seattle — Los Angeles
01/13/2026
Departure
Direct flight
UA5657
starting at $184
Seattle — Los Angeles
03/12/2026
Departure
Direct flight
AS1388
starting at $102
Seattle — Los Angeles
01/23/2026
Departure
Direct flight
AS1357
starting at $215
Seattle — Los Angeles
02/11/2026
Departure
Direct flight
AS524
starting at $90
Seattle — Los Angeles
08/08/2026
Departure
Direct flight
AS487
starting at $163
Seattle — Ontario
01/11/2026
Departure
Direct flight
AS6836
starting at $195
Seattle — Ontario
01/18/2026
Departure
Direct flight
0G6829
starting at $193
starting at $132
starting at $90
starting at $193
starting at $27
The Seattle — Ontario route is served by a wide range of airlines: 4 in total, including United Airlines, Alaska Airlines, Grumeti Air, and Frontier Airlines. Competition among carriers gives passengers the opportunity to find tickets at attractive fares — with prices starting from $27. Our service helps compare all available offers within seconds and choose the most convenient option. You can filter flights by price, departure time, or baggage rules to make your trip as comfortable as possible. With so many airlines, there’s always a chance to catch special promotions and save.
The cheapest flight ticket from Seattle to Ontario according to data for the last 48 hours costs $27
Often the best time to buy tickets from Seattle to Ontario is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Seattle to Ontario can be found flying in these months: March, January, November.
The fastest flights from Seattle to Ontario start from 2 hours 35 minutes in the air.
The following airlines operate direct flights on the route Seattle — Ontario: United Airlines, Alaska Airlines, Grumeti Air
The cheapest one-way flight from Seattle to Ontario departs on 02/10/2026, is operated by Frontier Airlines and costs $27
The cheapest roundtrip flight from Seattle to Ontario departs on 01/25/2026, is operated by Frontier Airlines and costs $48
Fastest flight from Seattle to Ontario takes 2h 35m
There are direct flights on this route 6 days a week: Su, Tu, We, Th, Fr, and Sa
The distance between Seattle and Ontario is 1557km (965 miles). There are 65 direct flights from Seattle to Ontario. Seattle and Ontario are in the same time zone. Flights from Seattle begin at 8:15 AM. The latest flight from Seattle departs at 9:25 PM
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 Seattle to Ontario. 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 Seattle to Ontario, despite the fact that sometimes flights with transfers can cost significantly less.
We couldn't find any special offers for flights from Seattle to Ontario