$108 Cheap United flights Ontario (ONT) to Seattle (SEA)

Prices were available within the past 7 days and start at $108 for one-way flights and $282 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Nov 28 - Wed, Dec 17

ONT

Ontario

SEA

Seattle

$282 Roundtrip, found 2 days ago

$282

Roundtrip

found 2 days ago

Select United flight, departing Fri, Nov 28 from Ontario to Seattle, returning Wed, Dec 17, priced at $282 found 2 days ago