Cheap flights from Warrenton to Ontario

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

Popular airlines from Warrenton to Ontario

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Cheap Flights from Warrenton (PDX) to Ontario (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.

Alaska Airlines
Fri, 5 Dec. - Mon, 8 Dec.
PDX
Portland
ONT
Ontario
AU$271 Return, found 1 day ago
AU$271
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 5 Dec. from Portland to Ontario, returning Mon, 8 Dec., priced at AU$271 found 1 day ago
Delta
Fri, 5 Dec. - Mon, 8 Dec.
PDX
Portland
ONT
Ontario
AU$302 Return, found 1 day ago
AU$302
Return
found 1 day ago
Select Delta flight, departing Fri, 5 Dec. from Portland to Ontario, returning Mon, 8 Dec., priced at AU$302 found 1 day ago
Alaska Airlines
Fri, 5 Dec. - Mon, 8 Dec.
PDX
Portland
ONT
Ontario
AU$317 Return, found 1 day ago
AU$317
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 5 Dec. from Portland to Ontario, returning Mon, 8 Dec., priced at AU$317 found 1 day ago
United
Fri, 5 Dec. - Mon, 8 Dec.
PDX
Portland
ONT
Ontario
AU$355 Return, found 1 day ago
AU$355
Return
found 1 day ago
Select United flight, departing Fri, 5 Dec. from Portland to Ontario, returning Mon, 8 Dec., priced at AU$355 found 1 day ago
Hawaiian Airlines
Tue, 29 Jul. - Tue, 12 Aug.
PDX
Portland
ONT
Ontario
AU$366 Return, found 4 days ago
AU$366
Return
found 4 days ago
Select Hawaiian Airlines flight, departing Tue, 29 Jul. from Portland to Ontario, returning Tue, 12 Aug., priced at AU$366 found 4 days ago
American Airlines
Fri, 5 Dec. - Mon, 8 Dec.
PDX
Portland
ONT
Ontario
AU$609 Return, found 1 day ago
AU$609
Return
found 1 day ago
Select American Airlines flight, departing Fri, 5 Dec. from Portland to Ontario, returning Mon, 8 Dec., priced at AU$609 found 1 day ago

Find the cheapest month to fly from Portland (PDX) to Ontario (ONT)

September is typically the cheapest month to fly

From AU$74 - AU$232 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.