Unable to find information about the schedule of direct flights from
Helping travelers to find the best flight offers
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 direct 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.
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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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.
Unable to find information about the schedule of direct flights from
The minimum one-way ticket price from Seattle to Ontario is $87 (December 2025), while the maximum is $131 (November 2025). On average, a ticket costs $110–$243.
The cheapest one-way flight from Seattle to Ontario departs on 01/20/2026, is operated by Frontier Airlines and costs $56
The cheapest roundtrip flight from Seattle to Ontario departs on 12/01/2025, is operated by Frontier Airlines and costs $161
Fastest flight from Seattle to Ontario takes 2h 39m
There are direct flights on this route 5 days a week: Mo, Tu, We, Th, 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
We couldn't find any special offers for flights from Seattle to Ontario
Seattle — Ontario
11/27/2025
Departure
Direct flight
AS664
Starting at $309
Seattle — Ontario
11/28/2025
Departure
Direct flight
0G6836
Starting at $262
Seattle — Ontario
11/29/2025
Departure
Direct flight
AS1364
Starting at $317
Seattle — Ontario
12/23/2025
Departure
Direct flight
0G6828
Starting at $180
Seattle — Ontario
01/04/2026
Departure
Direct flight
AS4479
Starting at $279
Seattle — Ontario
01/19/2026
Departure
Direct flight
AS664
Starting at $190
Seattle — Ontario
09/26/2026
Departure
Direct flight
AS378
Starting at $214
Seattle — Ontario
10/06/2026
Departure
Direct flight
01378
Starting at $211
Seattle — Ontario
11/26/2025
Departure
Direct flight
F93163
Starting at $134
Starting at $76
Starting at $119
Starting at $211
Starting at $56
The Seattle — Ontario route is served by a wide range of airlines: 4 in total, including Alaska Airlines, Grumeti Air, JetHunter, and Frontier Airlines. Competition among carriers gives passengers the opportunity to find tickets at attractive fares — with prices starting from $56. 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 $56
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: December, March, November.
The fastest flights from Seattle to Ontario start from 2 hours 39 minutes in the air.
The following airlines operate direct flights on the route Seattle — Ontario: Alaska Airlines, Grumeti Air, JetHunter