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Seattle ✈ Ontario

Cheapest airfares from Seattle to Ontario

Search for flight deals to Ontario

*All prices in AUD, prices may fluctuate slightly from the advertised price.
Fly on Sat, Aug 16th 2025
From $168

Frontier Airlines
F9 3163 (Direct)
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Fly on Fri, Jul 25th 2025
From $185

Frontier Airlines
F9 3163 (Direct)
View Flights
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