Cheap flights from Washington to Ontario

View AU$213 flight on Mon, 1 Sep. 2025Opens in a new window

Popular airlines from Washington to Ontario

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Cheap Flights from Washington (WAS) 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.

Delta
Mon, 1 Sep. - Mon, 8 Sep.
IAD
Washington
SNA
Orange County
AU$408 Return, found 6 days ago
AU$408
Return
found 6 days ago
Select Delta flight, departing Mon, 1 Sep. from Washington to Orange County, returning Mon, 8 Sep., priced at AU$408 found 6 days ago
Delta
Mon, 1 Sep. - Mon, 8 Sep.
DCA
Washington
SNA
Orange County
AU$425 Return, found 6 days ago
AU$425
Return
found 6 days ago
Select Delta flight, departing Mon, 1 Sep. from Washington to Orange County, returning Mon, 8 Sep., priced at AU$425 found 6 days ago
United
Mon, 1 Sep. - Mon, 8 Sep.
IAD
Washington
SNA
Orange County
AU$468 Return, found 6 days ago
AU$468
Return
found 6 days ago
Select United flight, departing Mon, 1 Sep. from Washington to Orange County, returning Mon, 8 Sep., priced at AU$468 found 6 days ago
Delta
Mon, 1 Sep. - Mon, 8 Sep.
BWI
Baltimore
SNA
Orange County
AU$471 Return, found 6 days ago
AU$471
Return
found 6 days ago
Select Delta flight, departing Mon, 1 Sep. from Baltimore to Orange County, returning Mon, 8 Sep., priced at AU$471 found 6 days ago
Delta
Mon, 1 Sep. - Mon, 8 Sep.
DCA
Washington
SNA
Orange County
AU$485 Return, found 6 days ago
AU$485
Return
found 6 days ago
Select Delta flight, departing Mon, 1 Sep. from Washington to Orange County, returning Mon, 8 Sep., priced at AU$485 found 6 days ago
American Airlines
Tue, 5 Aug. - Tue, 12 Aug.
BWI
Baltimore
ONT
Ontario
AU$619 Return, found 6 days ago
AU$619
Return
found 6 days ago
Select American Airlines flight, departing Tue, 5 Aug. from Baltimore to Ontario, returning Tue, 12 Aug., priced at AU$619 found 6 days ago

Find the cheapest month to fly from Washington (WAS) to Ontario (ONT)

February is typically the cheapest month to fly

From AU$212 - AU$611 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.