$124 Cheap United flights Seattle (SEA) to Ontario (ONT)

$124 Cheap United flights Seattle (SEA) to Ontario (ONT)

Prices were available within the past 7 days and start at $124 for one-way flights and $408 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Apr 16 - Sun, Apr 19

SEA

Seattle

ONT

Ontario

$408 Roundtrip, found 1 day ago

$408

Roundtrip

found 1 day ago

Select United flight, departing Thu, Apr 16 from Seattle to Ontario, returning Sun, Apr 19, priced at $408 found 1 day ago

Fri, Dec 26 - Mon, Dec 29

SEA

Seattle

ONT

Ontario

$421 Roundtrip, found 1 hour ago

$421

Roundtrip

found 1 hour ago

Select United flight, departing Fri, Dec 26 from Seattle to Ontario, returning Mon, Dec 29, priced at $421 found 1 hour ago