$92 Cheap Frontier Airlines flights Seattle (SEA) to Ontario (ONT)

$92 Cheap Frontier Airlines flights Seattle (SEA) to Ontario (ONT)

Prices were available within the past 7 days and start at $92 for one-way flights and $68 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jan 8 - Sun, Jan 11

SEA

Seattle

ONT

Ontario

$68 Roundtrip, found 6 days ago

$68

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Jan 8 from Seattle to Ontario, returning Sun, Jan 11, priced at $68 found 6 days ago

Sun, Jan 4 - Sun, Jan 11

SEA

Seattle

ONT

Ontario

$103 Roundtrip, found 6 days ago

$103

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sun, Jan 4 from Seattle to Ontario, returning Sun, Jan 11, priced at $103 found 6 days ago

Sat, Jan 3 - Sun, Jan 11

SEA

Seattle

ONT

Ontario

$128 Roundtrip, found 6 days ago

$128

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jan 3 from Seattle to Ontario, returning Sun, Jan 11, priced at $128 found 6 days ago

Thu, Jan 15 - Tue, Jan 27

SEA

Seattle

ONT

Ontario

$161 Roundtrip, found 5 days ago

$161

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Thu, Jan 15 from Seattle to Ontario, returning Tue, Jan 27, priced at $161 found 5 days ago

Tue, Jan 6 - Tue, Jan 13

SEA

Seattle

ONT

Ontario

$201 Roundtrip, found 6 days ago

$201

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Jan 6 from Seattle to Ontario, returning Tue, Jan 13, priced at $201 found 6 days ago