Cheap flights from Washington, D.C. to Ontario from $86

The month of December is, on average, the cheapest month to fly to Region of Ontario from Washington, D.C., with most prices found around $311. If you aren’t able to travel during the month of December, then book flights to Region of Ontario from Washington, D.C. during January instead. Flights to Region of Ontario in January, while not as cheap as those in December, still average around $317.

According to our data, Thursday is the cheapest day to fly to Region of Ontario from Washington, D.C.. The lowest ticket price found for a Thursday departure recently was $365. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Washington, D.C. to Region of Ontario on a Sunday will generally be more expensive and average around $591. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

According to our data, the cheapest time of day to fly to Region of Ontario is in the afternoon. momondo users have found flights departing from Washington, D.C. to Region of Ontario in the afternoon for as low as $381. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $419.

Fly from Washington, D.C. Dulles Intl to Toronto Island for the best Washington, D.C. - Ontario flight prices

You are more likely to see cheaper flights to Region of Ontario from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $374 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from Washington, D.C. for as low as $295 on momondo.

There are 4 cabin classes available to choose from on Washington, D.C. to Region of Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Delta, United Airlines, and Air Transat are the most popular carriers operating from Washington, D.C. to Ontario

Air Canada, United Airlines and Porter Airlines are the top three most popular airlines that fly to Region of Ontario from Washington, D.C. according to our data. Air Canada is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 7 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

As of November 2026, there are 10 flights per day flying from Washington, D.C. to Region of Ontario. The most common time of day flights depart is 5:00PM, with 57% of flights taking off in the afternoon.

73 flights are operational weekly from Washington, D.C. to Region of Ontario as of November 2026. The most popular departure day for this route is Sat, with 53% of flights per week taking off on this day.