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Cheap flights from Washington to Ontario from C$ 68

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
5 May — 12 May1
1 adult

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 30 April 2025.

Round-trip from

C$ 306

One-way from

C$ 68

Popular in

June

Cheapest in

January

Average price

C$ 682

Good round-trip deal

C$ 499 or less

Good one-way deal

C$ 227 or less
WestJet
  • WestJet
  • 16/5-18/5
  • 2 total stops
  • 17h 49m total
  • Washington to Ontario
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WestJet
  • WestJet
  • 15/9
  • 2 total stops
  • 11h 15m total
  • Washington to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 120 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Washington to Ontario.
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Price to beat on a one-way flight from Washington to Ontario.
Search Deals

Find flight deals from Washington to Ontario

Cheapest flights from Washington to Ontario
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 30 April 2025.

Fri 16/51:50 p.m.SEA - YHM
1 stop7h 51mWestJet
Sun 18/56:00 a.m.YHM - SEA
1 stop9h 58mWestJet
Deal found 28/4C$ 306
Thu 17/71:45 p.m.PDX - YYZ
1 stop7h 39mWestJet
Mon 21/78:00 a.m.YYZ - PDX
1 stop7h 52mWestJet
Deal found 28/4C$ 345
Mon 18/87:05 a.m.SEA - YKF
1 stop14h 41mWestJet
Sun 24/86:00 a.m.YKF - SEA
1 stop9h 58mWestJet
Deal found 28/4C$ 356
Wed 28/56:00 a.m.SEA - YYZ
1 stop15h 12mMultiple Airlines
Wed 4/62:00 p.m.YYZ - SEA
2 stops27h 11mMultiple Airlines
Deal found 28/4C$ 360
Thu 31/71:19 p.m.PDX - YYZ
2 stops13h 53mMultiple Airlines
Mon 4/86:30 a.m.YYZ - PDX
1 stop9h 22mMultiple Airlines
Deal found 28/4C$ 374
Tue 10/61:45 p.m.SEA - YYZ
1 stop7h 24mAir Canada
Tue 17/66:15 a.m.YYZ - SEA
1 stop9h 43mAir Canada
Deal found 28/4C$ 376
Tue 3/65:30 a.m.SEA - YTZ
2 stops10h 07mAir Canada
Tue 24/610:20 a.m.YTZ - SEA
2 stops13h 21mAir Canada
Deal found 29/4C$ 388
Thu 24/71:45 p.m.PDX - YUL
1 stop7h 58mWestJet
Tue 29/77:00 a.m.YUL - PDX
1 stop8h 52mWestJet
Deal found 28/4C$ 394
Wed 11/67:05 a.m.SEA - YKF
2 stops19h 25mMultiple Airlines
Wed 18/66:00 a.m.YKF - SEA
1 stop9h 58mMultiple Airlines
Deal found 28/4C$ 417
Sun 8/62:05 p.m.SEA - YYZ
2 stops12h 46mWestJet
Mon 16/66:30 a.m.YYZ - SEA
1 stop9h 28mWestJet
Deal found 28/4C$ 422
Sat 31/57:00 a.m.PDX - YYZ
1 stop6h 42mAir Canada
Mon 2/66:15 a.m.YYZ - PDX
2 stops11h 30mAir Canada
Deal found 28/4C$ 425
Wed 28/57:23 a.m.SEA - YYZ
Nonstop4h 37mAlaska Airlines
Tue 3/64:45 p.m.YYZ - SEA
Nonstop5h 19mAlaska Airlines
Deal found 28/4C$ 425

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 30 April 2025.
Use the filters below to find and compare flights from Washington to Ontario that are best for you.

Fly from

Washington

Fly to

Ontario

Route

Depart

Return

Price

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Fri 16/5

1:50 p.m.-12:41 a.m.

1 stop7h 51m

Hamilton

Sun 18/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 306

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 17/7

1:45 p.m.-12:24 a.m.

1 stop7h 39m

Toronto Pearson Intl

Mon 21/7

8:00 a.m.-12:52 p.m.

1 stop7h 52m

C$ 345

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Mon 18/8

7:05 a.m.-12:46 a.m.

1 stop14h 41m

Toronto Region of Waterloo Intl

Sun 24/8

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 356

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 28/5

6:00 a.m.-12:12 a.m.

1 stop15h 12m

Toronto Pearson Intl

Wed 4/6

2:00 p.m.-2:11 p.m.

2 stops27h 11m

C$ 360

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 31/7

1:19 p.m.-6:12 a.m.

2 stops13h 53m

Toronto Pearson Intl

Mon 4/8

6:30 a.m.-12:52 p.m.

1 stop9h 22m

C$ 374

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 10/6

1:45 p.m.-12:09 a.m.

1 stop7h 24m

Toronto Pearson Intl

Tue 17/6

6:15 a.m.-12:58 p.m.

1 stop9h 43m

C$ 376

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Tue 3/6

5:30 a.m.-6:37 p.m.

2 stops10h 07m

Toronto Island

Tue 24/6

10:20 a.m.-8:41 p.m.

2 stops13h 21m

C$ 388

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Thu 24/7

1:45 p.m.-12:43 a.m.

1 stop7h 58m

Montreal Pierre Elliott Trudeau Intl

Tue 29/7

7:00 a.m.-12:52 p.m.

1 stop8h 52m

C$ 394

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Wed 11/6

7:05 a.m.-5:30 a.m.

2 stops19h 25m

Toronto Region of Waterloo Intl

Wed 18/6

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 417

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 8/6

2:05 p.m.-5:51 a.m.

2 stops12h 46m

Toronto Pearson Intl

Mon 16/6

6:30 a.m.-12:58 p.m.

1 stop9h 28m

C$ 422

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 60 results
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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.
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 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 30 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 30 April 2025.

The most flights from USWA to CAON are scheduled on a Tuesday (6 on average). You will have fewer flight options on Wednesday, 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 30 April 2025.
See what other customers who have flown with Alaska Airlines, Delta and Qatar Airways 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.
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Qatar Airways
7.4
Good
3,563 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,961 reviews
Check prices

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines to fly from State of Washington to Region of Ontario one-way?

    The cheapest airlines for a one-way flight from State of Washington to Region of Ontario are WestJet (C$ 68), American Airlines (C$ 181), and Alaska Airlines (C$ 188).

  • Can I find deals for flights from Washington to Ontario that include hotel bookings?

    Yes. In addition to deals on Washington to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Ontario.

  • Can I find deals for business class flights from Washington to Ontario?

    Yes. Cheapflights offers flight deals from Washington to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 225AverageC$ 747FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 297AverageC$ 417FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 393AverageC$ 675FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapestC$ 507AverageC$ 734FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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.

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