$77 Cheap Frontier Airlines flights Ontario (ONT) to Seattle (SEA)

$77 Cheap Frontier Airlines flights Ontario (ONT) to Seattle (SEA)

Prices were available within the past 7 days and start at $77 for one-way flights and $154 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 9 - Tue, Oct 14

ONT

Ontario

SEA

Seattle

$154 Roundtrip, found 1 day ago

$154

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Oct 9 from Ontario to Seattle, returning Tue, Oct 14, priced at $154 found 1 day ago

Sat, Sep 27 - Tue, Oct 7

ONT

Ontario

SEA

Seattle

$159 Roundtrip, found 6 days ago

$159

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Sep 27 from Ontario to Seattle, returning Tue, Oct 7, priced at $159 found 6 days ago

Thu, Oct 9 - Tue, Oct 14

ONT

Ontario

SEA

Seattle

$171 Roundtrip, found 1 day ago

$171

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Oct 9 from Ontario to Seattle, returning Tue, Oct 14, priced at $171 found 1 day ago

Thu, Oct 9 - Tue, Oct 14

ONT

Ontario

SEA

Seattle

$195 Roundtrip, found 1 day ago

$195

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Oct 9 from Ontario to Seattle, returning Tue, Oct 14, priced at $195 found 1 day ago

Thu, Oct 9 - Tue, Oct 14

ONT

Ontario

SEA

Seattle

$199 Roundtrip, found 1 day ago

$199

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Oct 9 from Ontario to Seattle, returning Tue, Oct 14, priced at $199 found 1 day ago

Thu, Oct 9 - Tue, Oct 14

ONT

Ontario

SEA

Seattle

$202 Roundtrip, found 1 day ago

$202

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Oct 9 from Ontario to Seattle, returning Tue, Oct 14, priced at $202 found 1 day ago