Flights from Ontario/LA, CA to Seattle, WA

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Best Deals on Flights From Ontario/LA, CA (ONT) to Seattle, WA (SEA)

*Prices found by others in the previous 48 hours for round-trip flights. Prices shown may also require membership in our travel club, Discount Den.

Flights Deals from Ontario/LA, CA to Seattle, WA on Frontier

$
Flights Deals from Ontario/LA, CA to Seattle, WA on Frontier
From
To
Ontario/LA, CA (ONT)Seattle, WA (SEA)One-way
/
Discount Den Basic Fare		Departing Mar 28, 2026

From

$109

Last seen: 3 hours ago

*Prices found by others in the previous 48 hours for one-way flights. Prices shown may also require membership in our travel club, Discount Den®.

Ontario/LA, CA Seattle, WA

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