Flights from Seattle to Costa Mesa

Cheapest flights from Seattle

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 23 - Tue, Aug 26

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$140 Roundtrip, found 3 days ago

$140

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Aug 23 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Aug 26, priced at $140 found 3 days ago

Wed, Jul 23 - Tue, Jul 29

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$155 Roundtrip, found 3 days ago

$155

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Jul 23 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Jul 29, priced at $155 found 3 days ago

Tue, Sep 16 - Tue, Sep 23

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$157 Roundtrip, found 2 days ago

$157

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Tue, Sep 16 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Sep 23, priced at $157 found 2 days ago

Mon, Sep 15 - Mon, Sep 22

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$159 Roundtrip, found 2 days ago

$159

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Sep 15 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Mon, Sep 22, priced at $159 found 2 days ago

Sat, Aug 23 - Tue, Aug 26

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$160 Roundtrip, found 3 days ago

$160

Roundtrip

found 3 days ago

Select United flight, departing Sat, Aug 23 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Aug 26, priced at $160 found 3 days ago

Sun, Sep 14 - Mon, Sep 22

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$164 Roundtrip, found 2 days ago

$164

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Mon, Sep 22, priced at $164 found 2 days ago

Tue, Jul 22 - Tue, Jul 29

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$165 Roundtrip, found 3 days ago

$165

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Tue, Jul 22 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Jul 29, priced at $165 found 3 days ago

Tue, Sep 16 - Sat, Sep 20

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$167 Roundtrip, found 2 days ago

$167

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Tue, Sep 16 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Sat, Sep 20, priced at $167 found 2 days ago

Sat, Aug 23 - Tue, Aug 26

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$167 Roundtrip, found 3 days ago

$167

Roundtrip

found 3 days ago

Select Delta flight, departing Sat, Aug 23 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Aug 26, priced at $167 found 3 days ago

Sun, Sep 14 - Sun, Sep 21

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$169 Roundtrip, found 2 days ago

$169

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Sun, Sep 21, priced at $169 found 2 days ago

Sat, Aug 23 - Tue, Aug 26

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$170 Roundtrip, found 3 days ago

$170

Roundtrip

found 3 days ago

Select Alaska Airlines flight, departing Sat, Aug 23 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Aug 26, priced at $170 found 3 days ago

Wed, Sep 17 - Tue, Sep 23

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$177 Roundtrip, found 2 days ago

$177

Roundtrip

found 2 days ago

Select United flight, departing Wed, Sep 17 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Sep 23, priced at $177 found 2 days ago

Wed, Sep 17 - Tue, Sep 23

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$177 Roundtrip, found 2 days ago

$177

Roundtrip

found 2 days ago

Select American Airlines flight, departing Wed, Sep 17 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Sep 23, priced at $177 found 2 days ago

Tue, Sep 16 - Sat, Sep 20

SEA

Seattle - Tacoma Intl.

SNA

John Wayne

$177 Roundtrip, found 1 day ago

$177

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Tue, Sep 16 from Seattle - Tacoma Intl. to John Wayne, returning Sat, Sep 20, priced at $177 found 1 day ago

Sat, Sep 13 - Tue, Sep 16

PAE

Seattle Paine Field Intl. Airport

SNA

John Wayne

$177 Roundtrip, found 1 day ago

$177

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Sat, Sep 13 from Seattle Paine Field Intl. Airport to John Wayne, returning Tue, Sep 16, priced at $177 found 1 day ago

Wed, Sep 17 - Tue, Sep 23

SEA

Seattle - Tacoma Intl.

ONT

Los Angeles - Ontario Intl.

$177 Roundtrip, found 2 days ago

$177

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Wed, Sep 17 from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl., returning Tue, Sep 23, priced at $177 found 2 days ago

Mon, Jul 21 - Tue, Jul 29

SEA

Seattle - Tacoma Intl.

SNA

John Wayne

$209 Roundtrip, found 5 days ago

$209

Roundtrip

found 5 days ago

Select Spirit Airlines flight, departing Mon, Jul 21 from Seattle - Tacoma Intl. to John Wayne, returning Tue, Jul 29, priced at $209 found 5 days ago

Sat, Sep 13 - Sun, Sep 21

SEA

Seattle - Tacoma Intl.

LGB

Long Beach Municipal

$292 Roundtrip, found 2 days ago

$292

Roundtrip

found 2 days ago

Select Delta flight, departing Sat, Sep 13 from Seattle - Tacoma Intl. to Long Beach Municipal, returning Sun, Sep 21, priced at $292 found 2 days ago

Fri, Sep 12 - Thu, Sep 18

PAE

Seattle Paine Field Intl. Airport

ONT

Los Angeles - Ontario Intl.

$306 Roundtrip, found 4 days ago

$306

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Sep 12 from Seattle Paine Field Intl. Airport to Los Angeles - Ontario Intl., returning Thu, Sep 18, priced at $306 found 4 days ago

Sat, Sep 13 - Sun, Sep 21

PAE

Seattle Paine Field Intl. Airport

LGB

Long Beach Municipal

$1,272 Roundtrip, found 2 days ago

$1,272

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Sat, Sep 13 from Seattle Paine Field Intl. Airport to Long Beach Municipal, returning Sun, Sep 21, priced at $1,272 found 2 days ago