$84 Cheap Frontier Airlines flights Ontario (ONT) to Seattle (SEA)

$84 Cheap Frontier Airlines flights Ontario (ONT) to Seattle (SEA)

Prices were available within the past 7 days and start at $84 for one-way flights and $149 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Aug 6 - Sat, Aug 16

ONT

Ontario

SEA

Seattle

$149 Roundtrip, found 2 days ago

$149

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Ontario to Seattle, returning Sat, Aug 16, priced at $149 found 2 days ago

Wed, Aug 6 - Tue, Aug 19

ONT

Ontario

SEA

Seattle

$168 Roundtrip, found 2 days ago

$168

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Ontario to Seattle, returning Tue, Aug 19, priced at $168 found 2 days ago

Wed, Aug 6 - Sat, Aug 16

ONT

Ontario

SEA

Seattle

$173 Roundtrip, found 2 days ago

$173

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Ontario to Seattle, returning Sat, Aug 16, priced at $173 found 2 days ago

Mon, Aug 4 - Tue, Aug 19

ONT

Ontario

SEA

Seattle

$178 Roundtrip, found 2 days ago

$178

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Ontario to Seattle, returning Tue, Aug 19, priced at $178 found 2 days ago

Mon, Aug 4 - Thu, Aug 14

ONT

Ontario

SEA

Seattle

$188 Roundtrip, found 2 days ago

$188

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Ontario to Seattle, returning Thu, Aug 14, priced at $188 found 2 days ago

Sun, Aug 3 - Tue, Aug 19

ONT

Ontario

SEA

Seattle

$193 Roundtrip, found 2 days ago

$193

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Aug 3 from Ontario to Seattle, returning Tue, Aug 19, priced at $193 found 2 days ago