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

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

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.

Sat, Aug 23 - Tue, Aug 26

SEA

Seattle

ONT

Ontario

$149 Roundtrip, found 2 days ago

$149

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sat, Aug 23 from Seattle to Ontario, returning Tue, Aug 26, priced at $149 found 2 days ago

Tue, Aug 12 - Sat, Aug 23

SEA

Seattle

ONT

Ontario

$168 Roundtrip, found 1 day ago

$168

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Aug 12 from Seattle to Ontario, returning Sat, Aug 23, priced at $168 found 1 day ago

Tue, Aug 12 - Sun, Aug 24

SEA

Seattle

ONT

Ontario

$178 Roundtrip, found 1 day ago

$178

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Aug 12 from Seattle to Ontario, returning Sun, Aug 24, priced at $178 found 1 day ago

Wed, Jul 16 - Sun, Jul 20

SEA

Seattle

ONT

Ontario

$183 Roundtrip, found 5 days ago

$183

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Jul 16 from Seattle to Ontario, returning Sun, Jul 20, priced at $183 found 5 days ago

Fri, Aug 8 - Sun, Aug 24

SEA

Seattle

ONT

Ontario

$188 Roundtrip, found 1 day ago

$188

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 8 from Seattle to Ontario, returning Sun, Aug 24, priced at $188 found 1 day ago

Wed, Jul 16 - Sat, Jul 19

SEA

Seattle

ONT

Ontario

$193 Roundtrip, found 5 days ago

$193

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Jul 16 from Seattle to Ontario, returning Sat, Jul 19, priced at $193 found 5 days ago