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Seattle (SEA) » United States » SEA to ONT
Good to Know - Flights from Seattle to Ontario
$ 87.95
or less (round trip)
Top Tips for Finding Cheap Flights from Seattle to Ontario
Looking for cheap airfare from Seattle to Ontario? 25% of our users found round-trip tickets to Ontario for the following price or less: $ 87.95 Book at least 4 weeks before departure in order to get a below-average price. Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle to Ontario flight deals.
FAQs - Booking from Seattle to Ontario flights
The cheapest flight Seattle to Ontario found on flyus.com in the last 72 hours was $87.95 round-trip.
Find cheap flights from Seattle to Ontario and book discounted airfare from different cities all over the United States. Explore airline ticket deals on flight routes all over the World! At Flyus, we take pride in helping you discover and book the best flight deals for your next trip at the cheapest price. We make booking flights from different departures easy and provide you with peace of mind with our Best Purchase Guarantee.
Cheapest Flights
from Seattle, United States (SEA) to:
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Ontario, United States (ONT)Mar 20, 25 - Mar 27, 25$87.95
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Ontario, United States (ONT)Feb 20, 25 - Feb 27, 25$107.97
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Ontario, United States (ONT)Mar 03, 25 - Mar 10, 25$107.97
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Ontario, United States (ONT)Jan 16, 25 - Jan 23, 25$112.96
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Ontario, United States (ONT)Feb 06, 25 - Feb 13, 25$112.96