What’s the cost of a flight from Washington Dulles to Ontario?

Prices vary based on date, airline, and availability. Compare several options if you're flying between Washington and Ontario.

Choose a date to explore the best fares now.

If possible, avoid holiday periods: ticket prices tend to rise quickly and availability drops, especially on busy routes. Morning and evening flights are often in high demand too — book early to get a good fare.

Which departure and arrival airports are available?

Between Washington and Ontario, flight options may depend on the combination of airports available.

• Airports in Washington: Washington is connected by 3 airports - Dulles international, Ronald Reagan, Washington International.
• Airports in Ontario: Ontario is the only active airport in the area.

Sometimes flying into a nearby city can be more cost-effective. When a city has multiple airports, it’s worth comparing different flight combinations.

Compare flights from Washington Dulles to Ontario with advanced filters

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If you have a preferred time to leave or arrive, filters can help you show only the matching flights. You can also filter by your favorite airline and see only those deals.