Cheap flights from Ontario to Washington, D.C. from C$ 173
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/9. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Ontario to Washington, D.C.
Keep the following information in mind while searching for Ontario to Washington, D.C. flight deals. Data was last updated 17 September 2025.
Find flight deals from Ontario to Washington, D.C.
Cheapest flights from Ontario to Washington, D.C.Explore the most affordable flight options available from Ontario to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.
Explore the most affordable flight options available from Ontario to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.
Cheapflights Fare Finder
Use the filters below to find and compare flights from Ontario to Washington, D.C. that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Thu 13/11
3:45 p.m.-5:14 p.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Sun 16/11
11:40 a.m.-1:10 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Fri 17/10
8:45 a.m.-10:16 a.m.
Nonstop1h 31m
Washington, D.C. Dulles Intl
Tue 21/10
4:20 p.m.-5:53 p.m.
Nonstop1h 33m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Thu 9/10
1:35 p.m.-3:06 p.m.
Nonstop1h 31m
Washington, D.C. Dulles Intl
Sat 11/10
4:20 p.m.-5:53 p.m.
Nonstop1h 33m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Wed 12/11
3:45 p.m.-5:14 p.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Tue 18/11
6:30 p.m.-8:00 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Tue 11/11
3:45 p.m.-5:14 p.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Thu 13/11
11:40 a.m.-1:10 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Tue 4/11
3:45 p.m.-5:14 p.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Thu 4/12
11:40 a.m.-1:10 p.m.
Nonstop1h 30m
TorontoBaltimore
YYZ - BWI
YYZBWI
Toronto Pearson Intl
Wed 15/10
6:30 a.m.-11:01 a.m.
1 stop28h 31m
Baltimore/Washington
Wed 22/10
5:20 p.m.-2:05 p.m.
1 stop20h 45m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Sat 8/11
11:00 a.m.-12:29 p.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Tue 11/11
6:30 p.m.-8:00 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Sat 25/10
1:35 p.m.-3:06 p.m.
Nonstop1h 31m
Washington, D.C. Dulles Intl
Sat 1/11
1:45 p.m.-3:15 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - DCA
YTZDCA
Toronto Island
Tue 7/10
3:25 p.m.-9:51 p.m.
1 stop6h 26m
Washington, D.C. Reagan-National
Sun 23/11
12:55 p.m.-6:13 p.m.
1 stop5h 18m
Best time to book a flight from Ontario to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Ontario with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Washington, D.C.
What is the cheapest month to book a flight from Region of Ontario to Washington, D.C.?
Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. (average of C$ 256). Flying from Region of Ontario to Washington, D.C. in October is currently the most expensive (average of C$ 352). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ON to WAS?
Find hourly flight availability from Ontario to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 September 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to Washington, D.C. as you normally would.
Weekly flight availability from Region of Ontario to Washington, D.C.
Explore weekly flight availability from Ontario to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 September 2025.
The most flights from CAON to WAS are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (23 on average).
Related info for your journey
Find useful and relevant information for your journey from Ontario to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Washington, D.C.?
Book flights to Washington, D.C. if you plan to visit one of these locationsBrowse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Ontario to Washington, D.C.
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from Ontario to Washington, D.C.
Discover the top 7 airlines that operate flights from Ontario to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 17 September 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Ontario to Washington, D.C.?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Washington, D.C. from Ontario today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Ontario to Washington, D.C.?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to Washington, D.C. for you. Better yet — we are completely free to use.
Can Cheapflights find flights from Ontario to Washington, D.C. with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Washington, D.C. flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Ontario to Washington, D.C. become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington, D.C. from Ontario today and book when prices fit your budget.