Cheap flights from Washington to Ontario from C$ 95
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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Washington to Ontario
Keep the following information in mind while searching for Washington to Ontario flight deals. Data was last updated 22 April 2025.
Find flight deals from Washington to Ontario
Cheapest flights from Washington to OntarioExplore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 April 2025.
Explore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 April 2025.
Cheapflights Fare Finder
Customize your flight search to find flights from Washington 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 629,999 searches. Data last updated 22 April 2025.
Use the filters below to find and compare flights from Washington to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SeattleHamilton
SEA - YHM
SEAYHM
Seattle/Tacoma Intl
Tue 15/7
2:05 p.m.-12:41 a.m.
1 stop7h 36m
Hamilton
Tue 22/7
6:00 a.m.-12:58 p.m.
1 stop9h 58m
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Thu 5/6
7:05 a.m.-5:14 a.m.
1 stop19h 09m
London
Thu 12/6
6:15 a.m.-10:51 a.m.
1 stop7h 36m
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Thu 5/6
2:55 p.m.-9:18 a.m.
2 stops15h 23m
London
Thu 12/6
6:15 a.m.-10:51 a.m.
1 stop7h 36m
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Wed 4/6
11:50 p.m.-2:58 p.m.
2 stops12h 08m
London
Wed 11/6
6:15 a.m.-10:51 a.m.
1 stop7h 36m
PortlandToronto
PDX - YYZ
PDXYYZ
Portland
Thu 5/6
1:45 p.m.-5:51 a.m.
2 stops13h 06m
Toronto Pearson Intl
Tue 10/6
8:00 a.m.-12:52 p.m.
1 stop7h 52m
SeattleLondon
SEA - YXU
SEAYXU
Seattle/Tacoma Intl
Wed 25/6
7:05 a.m.-5:14 a.m.
1 stop19h 09m
London
Sun 29/6
8:00 p.m.-12:31 p.m.
2 stops19h 31m
SeattleHamilton
SEA - YHM
SEAYHM
Seattle/Tacoma Intl
Tue 3/6
3:20 p.m.-12:41 a.m.
2 stops30h 21m
Hamilton
Tue 10/6
6:00 a.m.-8:28 p.m.
1 stop17h 28m
PortlandToronto
PDX - YYZ
PDXYYZ
Portland
Wed 4/6
1:37 p.m.-6:12 a.m.
2 stops13h 35m
Toronto Pearson Intl
Wed 11/6
8:05 p.m.-11:17 a.m.
1 stop18h 12m
PortlandMontreal
PDX - YUL
PDXYUL
Portland
Sun 1/6
1:45 p.m.-12:43 a.m.
1 stop7h 58m
Montreal Pierre Elliott Trudeau Intl
Sat 7/6
7:00 a.m.-12:52 p.m.
1 stop8h 52m
SeattleToronto
SEA - YKF
SEAYKF
Seattle/Tacoma Intl
Wed 11/6
3:39 p.m.-5:30 a.m.
2 stops10h 51m
Toronto Region of Waterloo Intl
Wed 18/6
6:00 a.m.-12:58 p.m.
1 stop9h 58m
Best time to book a flight from Washington to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Washington with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Washington to Ontario
What is the cheapest month to book a flight from State of Washington to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from State of Washington to Region of Ontario (average of C$ 167). Flying from State of Washington to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 WA to ON?
Find hourly flight availability from Washington 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 22 April 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Region of Ontario as you normally would.
Weekly flight availability from State of Washington to Region of Ontario
Explore weekly flight availability from Washington 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 22 April 2025.
The most flights from USWA to CAON are scheduled on a Tuesday (6 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).
Rainfall in Ontario by month
Plan your trip to Ontario by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.
Temperature in Ontario by month
Plan your trip to Ontario by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).
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 22 April 2025.
See what other customers who have flown with Alaska Airlines, Delta and United Airlines from Washington to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Comfort
Crew
Overall
Food
Boarding
Reviews
Anonymous,Apr 2025
LAS - STS
Entertainment
Comfort
Crew
Overall
Food
Boarding
Reviews
Anonymous,Apr 2025
LAS - STS
Entertainment
Comfort
Crew
Overall
Food
Boarding
Reviews
Anonymous,Apr 2025
LAS - STS
Entertainment
Comfort
Crew
Overall
Food
Boarding
Reviews
Anonymous,Apr 2025
LAS - STS
Entertainment
Comfort
Crew
Overall
Food
Boarding
Reviews
Anonymous,Apr 2025
LAS - STS
Entertainment
Comfort
Crew
Overall
Food
Boarding
Reviews
Anonymous,Apr 2025
LAS - STS
Related info for your journey
Find useful and relevant information for your journey from Washington to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse 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 Washington to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Top 4 airlines flying from Washington to Ontario
Discover the top 4 airlines that operate flights from Washington 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 629,999 searches. Data last updated 22 April 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 Washington to Ontario?
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 Ontario from Washington today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Washington to Ontario?
Cheapflights simply makes it quick and affordable to book flights from Washington to Ontario by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from Washington to Ontario with no change fees?
Certainly. Search results for flights to Ontario from Washington shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Washington to Ontario become cheaper?
Of course! You can now track prices for flights from Washington to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.