$61 Cheap Frontier Airlines flights Ontario (ONT) to Seattle (SEA)

$61 Cheap Frontier Airlines flights Ontario (ONT) to Seattle (SEA)

Prices were available within the past 7 days and start at $61 for one-way flights and $131 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 18 - Thu, Sep 25

ONT

Ontario

SEA

Seattle

$131 Roundtrip, found 6 days ago

$131

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Sep 18 from Ontario to Seattle, returning Thu, Sep 25, priced at $131 found 6 days ago

Fri, Sep 19 - Thu, Sep 25

ONT

Ontario

SEA

Seattle

$140 Roundtrip, found 6 days ago

$140

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Sep 19 from Ontario to Seattle, returning Thu, Sep 25, priced at $140 found 6 days ago

Thu, Sep 25 - Fri, Sep 26

ONT

Ontario

SEA

Seattle

$148 Roundtrip, found 4 days ago

$148

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Thu, Sep 25 from Ontario to Seattle, returning Fri, Sep 26, priced at $148 found 4 days ago

Wed, Aug 27 - Wed, Sep 3

ONT

Ontario

SEA

Seattle

$149 Roundtrip, found 6 days ago

$149

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Wed, Aug 27 from Ontario to Seattle, returning Wed, Sep 3, priced at $149 found 6 days ago

Thu, Sep 18 - Sun, Sep 21

ONT

Ontario

SEA

Seattle

$156 Roundtrip, found 6 days ago

$156

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Sep 18 from Ontario to Seattle, returning Sun, Sep 21, priced at $156 found 6 days ago

Thu, Sep 18 - Mon, Sep 22

ONT

Ontario

SEA

Seattle

$164 Roundtrip, found 4 days ago

$164

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Thu, Sep 18 from Ontario to Seattle, returning Mon, Sep 22, priced at $164 found 4 days ago

Thu, Sep 18 - Mon, Sep 22

ONT

Ontario

SEA

Seattle

$186 Roundtrip, found 6 days ago

$186

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Sep 18 from Ontario to Seattle, returning Mon, Sep 22, priced at $186 found 6 days ago

Thu, Sep 25 - Mon, Sep 29

ONT

Ontario

SEA

Seattle

$194 Roundtrip, found 4 days ago

$194

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Thu, Sep 25 from Ontario to Seattle, returning Mon, Sep 29, priced at $194 found 4 days ago

Sat, Aug 16 - Tue, Aug 19

ONT

Ontario

SEA

Seattle

$200 Roundtrip, found 1 day ago

$200

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Aug 16 from Ontario to Seattle, returning Tue, Aug 19, priced at $200 found 1 day ago