Flights to Costa Mesa from Seattle - $57

Cheap Flights from Seattle to Costa Mesa (SEA-QLA)

Prices were available within the past 7 days and start at $57 for one-way flights and $114 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 26 - Wed, Aug 27

SEA

Seattle

ONT

Ontario

$114 Roundtrip, found 2 hours ago

$114

Roundtrip

found 2 hours ago

Select Southwest Airlines flight, departing Tue, Aug 26 from Seattle to Ontario, returning Wed, Aug 27, priced at $114 found 2 hours ago

Sat, Aug 23 - Wed, Aug 27

SEA

Seattle

ONT

Ontario

$119 Roundtrip, found 2 hours ago

$119

Roundtrip

found 2 hours ago

Select Southwest Airlines flight, departing Sat, Aug 23 from Seattle to Ontario, returning Wed, Aug 27, priced at $119 found 2 hours ago

Wed, Jul 30 - Wed, Aug 13

SEA

Seattle

ONT

Ontario

$122 Roundtrip, found 2 hours ago

$122

Roundtrip

found 2 hours ago

Select Frontier Airlines flight, departing Wed, Jul 30 from Seattle to Ontario, returning Wed, Aug 13, priced at $122 found 2 hours ago

Wed, Jul 30 - Wed, Aug 13

SEA

Seattle

ONT

Ontario

$157 Roundtrip, found 2 hours ago

$157

Roundtrip

found 2 hours ago

Select Delta flight, departing Wed, Jul 30 from Seattle to Ontario, returning Wed, Aug 13, priced at $157 found 2 hours ago

Wed, Jul 30 - Tue, Aug 5

SEA

Seattle

ONT

Ontario

$172 Roundtrip, found 3 hours ago

$172

Roundtrip

found 3 hours ago

Select United flight, departing Wed, Jul 30 from Seattle to Ontario, returning Tue, Aug 5, priced at $172 found 3 hours ago

Tue, Oct 21 - Sat, Oct 25

SEA

Seattle

ONT

Ontario

$177 Roundtrip, found 1 day ago

$177

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Tue, Oct 21 from Seattle to Ontario, returning Sat, Oct 25, priced at $177 found 1 day ago