FFL Helper / Seattle / Ontario

SEA → ONT

Seattle (SEA) to Ontario (ONT)

Compare one-way fares for flights from Seattle to Ontario.

Lowest fare $145

Distance 968 mi

Flight time 2h 48m

Airports SEA–ONT

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By month: November 2026 from $145

Price calendar

October 2026

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November 2026

From $145

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Upcoming dates

Ontario ONT

$145

Nov 09, 10:50am · 2h 48m · 0 stops

SEA → ONT · Frontier Airlines

Tickets

About this route

This calendar shows dated one-way fares from Seattle to Ontario. Use it to see which days are cheaper before you search tickets.

Flight time and airport codes on this page are for the sample itinerary we have on file. Always confirm the live routing when you book Seattle to Ontario.