Cheap flights from Ontario to Washington, D.C. from C$ 175
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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
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 23 October 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 23 October 2025.
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 23 October 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
6:30 p.m.-8:00 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Fri 5/12
8:55 a.m.-10:24 a.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Fri 12/12
6:30 p.m.-8:00 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Thu 13/11
8:55 a.m.-10:24 a.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Thu 20/11
6:30 p.m.-8:00 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Thu 20/11
8:55 a.m.-10:24 a.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Thu 20/11
6:30 p.m.-8:00 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Thu 27/11
3:45 p.m.-5:14 p.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Sat 29/11
1:45 p.m.-3:15 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Sun 16/11
8:55 a.m.-10:24 a.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 18/11
3:45 p.m.-5:14 p.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Tue 25/11
6:30 p.m.-8:00 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Fri 14/11
8:55 a.m.-10:24 a.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Sun 16/11
6:30 p.m.-8:00 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YTZ - IAD
YTZIAD
Toronto Island
Fri 21/11
3:45 p.m.-5:14 p.m.
Nonstop1h 29m
Washington, D.C. Dulles Intl
Thu 27/11
11:40 a.m.-1:10 p.m.
Nonstop1h 30m
TorontoWashington, D.C.
YYZ - IAD
YYZIAD
Toronto Pearson Intl
Wed 26/11
7:40 p.m.-9:20 p.m.
Nonstop1h 40m
Washington, D.C. Dulles Intl
Sat 29/11
4:30 p.m.-6:03 p.m.
Nonstop1h 33m
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, April is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. (average of C$ 98). Flying from Region of Ontario to Washington, D.C. in January is currently the most expensive (average of C$ 262). 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 23 October 2025.
It’s typically best to fly out from Region of Ontario to Washington, D.C. in the morning. Doing so could potentially save you 15% on the flight price compared to flying in the evening, which is usually more expensive.
What is the cheapest day to fly from Region of Ontario to Washington, D.C.?
Use this chart to determine the cheapest time to fly round-trip from Ontario to Washington, D.C.. Price data was last updated on 16 December 2024.
Travelers seeking maximum savings on their Region of Ontario to Washington, D.C. flight should consider departing on Saturday afternoons when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 23 October 2025.
The most flights from CAON to WAS are scheduled on a Wednesday (30 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 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
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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 23 October 2025.
Fly with Cheapflights
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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.