Best airfares from Seattle to Ontario
Jetradar compares airfares from Seattle to Ontario with hundreds of airlines (including United Airlines, American Airlines, Alaska Airlines) and dozens of online travel agencies in one single place. We provide you with all the options to find the cheapest flights to Ontario, you choose where to book. Also there you can find airlines special offers from Seattle to Ontario. The cheapest round-trip price found within the last week was $98. The cheapest oneway price found within the last week was $54.Cheapest Flights from Seattle, WA to Ontario, CA
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Airline One Way One Way / Round-Trip Round-Trip 
United Airlines $74 $107 
American Airlines $97 $114 
Alaska Airlines $85 $98 
Air Canada $935 Find 
Aeromexico $1,162 $1,262 -
Airline One Way One Way / Round-Trip Round-Trip 
Virgin America $60 $92 
Spirit Airlines $42 $59 
Frontier Airlines $248 $367 
Southwest Airlines $87 $122 
Thomas Cook Airlines Limitedof Manchester Find Find
Flights from Seattle to Ontario
Travelling from Seattle to Ontario advices and facts
- The distance between Seattle and Ontario is 966 miles (or 1555 kilometers).
- The shortest flight time is 3h 4m
- There is no time difference between Seattle and Ontario. Check this again shortly before your flight.