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Tips and tricks to help you find cheap flights from Washington DC to Ontario

Favorite airline: Alaska Airlines
95 % of travelers choose to book flights on this route with Alaska Airlines, American Airlines and United Airlines.
Alaska Airlines
62 %
American Airlines
25 %
United Airlines
8 %
Favourite connection: via Seattle-Tacoma
The most popular route is via Seattle-Tacoma and is booked by 68 % of all travelers.
Route
bookings
1 stopover Seattle-Tacoma International Airport, WA
10h 30min, from $430
68 %
1 stopover Dallas-Fort Worth International Airport, T
09h 10min, from $323
27 %
1 stopover San Francisco International Airport, CA
08h 09min, from $336
5 %
Flight details Washington DC - Ontario
  • Distance: 3604 km