Cheap flights from Portland to Costa Mesa

View AU$122 flight on Sat, 23 Aug. 2025Opens in a new window

Popular airlines from Portland to Costa Mesa

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Cheap Flights from Portland (PDX) to Costa Mesa (QLA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, 31 Aug. - Sun, 7 Sep.
PDX
Portland
ONT
Ontario
AU$347 Return, found 5 days ago
AU$347
Return
found 5 days ago
Select Delta flight, departing Sun, 31 Aug. from Portland to Ontario, returning Sun, 7 Sep., priced at AU$347 found 5 days ago
Delta
Sun, 31 Aug. - Sun, 7 Sep.
PDX
Portland
ONT
Ontario
AU$358 Return, found 5 days ago
AU$358
Return
found 5 days ago
Select Delta flight, departing Sun, 31 Aug. from Portland to Ontario, returning Sun, 7 Sep., priced at AU$358 found 5 days ago
Hawaiian Airlines
Tue, 29 Jul. - Tue, 12 Aug.
PDX
Portland
ONT
Ontario
AU$366 Return, found 1 day ago
AU$366
Return
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, 29 Jul. from Portland to Ontario, returning Tue, 12 Aug., priced at AU$366 found 1 day ago
Alaska Airlines
Sun, 31 Aug. - Sun, 7 Sep.
PDX
Portland
ONT
Ontario
AU$373 Return, found 5 days ago
AU$373
Return
found 5 days ago
Select Alaska Airlines flight, departing Sun, 31 Aug. from Portland to Ontario, returning Sun, 7 Sep., priced at AU$373 found 5 days ago
Alaska Airlines
Sun, 31 Aug. - Sun, 7 Sep.
PDX
Portland
ONT
Ontario
AU$394 Return, found 5 days ago
AU$394
Return
found 5 days ago
Select Alaska Airlines flight, departing Sun, 31 Aug. from Portland to Ontario, returning Sun, 7 Sep., priced at AU$394 found 5 days ago
United
Sun, 31 Aug. - Sun, 7 Sep.
PDX
Portland
ONT
Ontario
AU$401 Return, found 5 days ago
AU$401
Return
found 5 days ago
Select United flight, departing Sun, 31 Aug. from Portland to Ontario, returning Sun, 7 Sep., priced at AU$401 found 5 days ago

Find the cheapest month to fly from Portland (PDX) to Santa Ana (SNA)

June is typically the cheapest month to fly

From AU$130 - AU$374 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.