$82+ Cheap flights from Washington, D.C. (WAS) to Ontario
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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YYZ
Feb 7 — Feb 141
1 adult, Economy
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Find cheap flights from Washington, D.C. to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Washington, D.C. to Ontario
Keep the following information in mind while searching for Washington, D.C. to Ontario flight deals. Data was last updated January 8, 2026.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $186 (FlightHub) |
One-way from | $82 (Kiwi.com) |
Popular in | November |
Cheapest in | June |
Average price | $290 |
Good round-trip deal | $248 or less |
Good one-way deal | $135 or less |
Find flight deals from Washington, D.C. to Ontario
Cheapest flights from Washington, D.C. to OntarioExplore the most affordable flight options available from Washington, D.C. to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.
Explore the most affordable flight options available from Washington, D.C. to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.
This Flightnetwork deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/296:00 amDCA - YYZ
1 stop4h 49mAir Canada
Sun 2/18:15 amYYZ - DCA
1 stop4h 04mAir Canada
Deal found 1/8![Air Canada logo]()
$191
This FlightHub deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/2311:35 amIAD - YTZ
Nonstop1h 34mPorter Airlines
Mon 1/268:50 amYTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 1/8![Porter Airlines logo]()
$193
This FlightHub deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:40 amIAD - YTZ
Nonstop1h 30mPorter Airlines
Mon 4/208:55 amYTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 1/8![Porter Airlines logo]()
$195
This FlightHub deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1011:40 amIAD - YTZ
Nonstop1h 30mPorter Airlines
Tue 4/143:45 pmYTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 1/8![Porter Airlines logo]()
$197
This Flightnetwork deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/226:30 pmIAD - YTZ
Nonstop1h 30mMultiple Airlines
Sun 3/13:45 pmYTZ - IAD
Nonstop1h 29mMultiple Airlines
Deal found 1/7![Multiple Airlines logo]()
$201
This Flightnetwork deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/224:15 pmDCA - YYZ
1 stop6h 49mAir Canada
Sun 3/18:15 amYYZ - DCA
1 stop4h 04mAir Canada
Deal found 1/7![Air Canada logo]()
$201
This FlightHub deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/111:40 amIAD - YTZ
Nonstop1h 30mPorter Airlines
Sun 2/88:50 amYTZ - IAD
Nonstop1h 32mPorter Airlines
Deal found 1/7![Porter Airlines logo]()
$202
This Flightnetwork deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/219:40 amDCA - YYZ
Nonstop1h 37mAir Canada
Sun 2/228:15 amYYZ - DCA
1 stop4h 04mAir Canada
Deal found 1/7![Air Canada logo]()
$202
This FlightHub deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/281:45 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Mon 3/308:55 amYTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 1/7![Porter Airlines logo]()
$203
This FlightHub deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:45 pmIAD - YTZ
Nonstop1h 30mPorter Airlines
Mon 4/203:45 pmYTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 1/8![Porter Airlines logo]()
$205
This FlightHub deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/611:40 amIAD - YTZ
Nonstop1h 30mMultiple Airlines
Sun 2/88:50 amYTZ - IAD
Nonstop1h 32mMultiple Airlines
Deal found 1/5![Multiple Airlines logo]()
$206
This Gotogate deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/205:46 pmIAD - YYZ
1 stop5h 18mAir Canada
Fri 2/272:15 pmYYZ - IAD
Nonstop1h 34mAir Canada
Deal found 1/6![Air Canada logo]()
$206
Cheapflights Fare Finder
Customize your flight search to find flights from Washington, D.C. to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Ontario that are best for you.
Fly from
Washington, D.C.
Fly to
Ontario
Route
Depart
Return
Price
Washington, D.C.Toronto
IAD - YTZ
IADYTZ
Washington, D.C. Dulles Intl
Sat 3/7
1:45 pm-3:15 pm
Nonstop1h 30m
Toronto Island
Sun 3/15
3:45 pm-5:14 pm
Nonstop1h 29m
$206
Washington, D.C.Toronto
IAD - YTZ
IADYTZ
Washington, D.C. Dulles Intl
Fri 2/6
11:40 am-1:10 pm
Nonstop1h 30m
Toronto Island
Sun 2/8
8:50 am-10:22 am
Nonstop1h 32m
$206
Washington, D.C.Toronto
IAD - YTZ
IADYTZ
Washington, D.C. Dulles Intl
Mon 3/9
11:40 am-1:10 pm
Nonstop1h 30m
Toronto Island
Sun 3/15
3:45 pm-5:14 pm
Nonstop1h 29m
$206
Washington, D.C.Toronto
IAD - YTZ
IADYTZ
Washington, D.C. Dulles Intl
Thu 4/2
11:40 am-1:10 pm
Nonstop1h 30m
Toronto Island
Sun 4/5
3:45 pm-5:14 pm
Nonstop1h 29m
$206
Washington, D.C.Toronto
IAD - YTZ
IADYTZ
Washington, D.C. Dulles Intl
Sat 3/7
1:45 pm-3:15 pm
Nonstop1h 30m
Toronto Island
Sat 3/14
11:00 am-12:29 pm
Nonstop1h 29m
$206
Washington, D.C.Toronto
IAD - YTZ
IADYTZ
Washington, D.C. Dulles Intl
Sun 3/8
6:30 pm-8:00 pm
Nonstop1h 30m
Toronto Island
Sat 3/14
11:00 am-12:29 pm
Nonstop1h 29m
$206
Washington, D.C.Toronto
IAD - YTZ
IADYTZ
Washington, D.C. Dulles Intl
Sat 3/14
1:45 pm-3:15 pm
Nonstop1h 30m
Toronto Island
Mon 3/16
3:45 pm-5:14 pm
Nonstop1h 29m
$213
Washington, D.C.Toronto
DCA - YTZ
DCAYTZ
Washington, D.C. Reagan-National
Sun 2/22
12:55 pm-6:10 pm
1 stop5h 15m
Toronto Island
Sun 3/1
9:55 pm-12:19 pm
1 stop14h 24m
$218
Washington, D.C.Toronto
IAD - YTZ
IADYTZ
Washington, D.C. Dulles Intl
Thu 2/5
11:40 am-1:10 pm
Nonstop1h 30m
Toronto Island
Thu 2/12
8:50 am-10:22 am
Nonstop1h 32m
$219
Washington, D.C.Toronto
DCA - YYZ
DCAYYZ
Washington, D.C. Reagan-National
Sat 1/24
8:00 pm-9:58 am
1 stop13h 58m
Toronto Pearson Intl
Sun 1/25
12:45 pm-5:31 pm
1 stop4h 46m
$231
Showing 1-10 of 60 results
Best time to book a flight from Washington, D.C. to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Washington, D.C. with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Washington, D.C. to Ontario
What is the cheapest month to book a flight from Washington, D.C. to Region of Ontario?
Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of $94). Flying from Washington, D.C. to Region of Ontario in January is currently the most expensive (average of $187). 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 WAS to ON?
Find hourly flight availability from Washington, D.C. to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 8, 2026.
It’s optimal to fly from Washington, D.C. to Region of Ontario at noon. By choosing this option you can save up to 46% on the cost of your flight, compared to a flight in the evening.
What is the cheapest day to fly from Washington, D.C. to Region of Ontario?
Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Ontario. Price data was last updated on November 25, 2025.
Travelers seeking maximum savings on their Washington, D.C. to Region of Ontario flight should consider departing on Sunday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Washington, D.C. to Region of Ontario
Explore weekly flight availability from Washington, D.C. to Ontario. 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 January 8, 2026.
The most flights from WAS to CAON are scheduled on a Monday (28 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (26 on average).
How much does it cost to fly round-trip from Washington, D.C. to Region of Ontario?
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated January 8, 2026.
Peruse reviews from past customers who have flown with Porter Airlines, Air Transat, and United Airlines from Washington, D.C. to Ontario to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
7.9
Food
7.6
Overall
8.0
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Crew
8.6
Comfort
7.9
Food
7.6
Overall
8.0
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Crew
8.6
Comfort
7.9
Food
7.6
Overall
8.0
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Crew
8.6
Comfort
7.9
Food
7.6
Overall
8.0
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Crew
8.6
Comfort
7.9
Food
7.6
Overall
8.0
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Crew
8.6
Comfort
7.9
Food
7.6
Overall
8.0
Boarding
8.2
Entertainment
7.0
Reviews
1 / 20
8.0
ExcellentMohameed,Nov 2025
LAS - YYZ
Related info for your journey
Find useful and relevant information for your journey from Washington, D.C. to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Washington, D.C. to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from Washington, D.C. to Ontario
Discover the top 7 airlines that operate flights from Washington, D.C. to Ontario. 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 2,558,603 searches. Data last updated January 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$54 | Average$314 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$127 | Average$392 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$176 | Average$245 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$187 | Average$382 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$255 | Average$329 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$261 | Average$374 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$349 | Average$492 | FlexibilityNo cancel fee | On-time60% |