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Flight booking tips

Favorite airline: e.g. American Airlines, Delta, Frontier Airlines
The favorite airline for flights from Washington DC to Ontario is American Airlines.
American Airlines
29 %
Delta
29 %
Frontier Airlines
29 %
Favourite connection: via Denver
The most popular route is via Denver and is booked by 67 % of all travelers.
Route
bookings
1 stopover Denver International Airport, CO
10h 03min, from $564
67 %
1 stopover Seattle-Tacoma International Airport, WA
09h 23min, from $510
33 %