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Cheap flights from Washington to Ontario from C$ 156

SEA — YYZ
15 Oct — 22 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Washington to Ontario

Mon 19/107:35 p.m. -
1 stop7h 00m
Thu 22/101:20 p.m. -
1 stop8h 25m
Deal found 13/9C$ 370
Sat 10/107:35 p.m. -
1 stop7h 00m
Mon 19/101:20 p.m. -
1 stop8h 25m
Deal found 12/9C$ 374
Fri 2/102:30 p.m. -
2 stops11h 40m
Sun 4/107:00 a.m. -
1 stop9h 50m
Deal found 15/9C$ 415
Tue 20/107:35 p.m. -
1 stop8h 30m
Fri 23/106:45 a.m. -
2 stops15h 00m
Deal found 15/9C$ 420
Sat 17/107:35 p.m. -
1 stop8h 30m
Wed 21/106:45 a.m. -
2 stops15h 00m
Deal found 14/9C$ 425
Mon 28/92:30 p.m. -
2 stops11h 40m
Sun 4/109:00 a.m. -
1 stop7h 50m
Deal found 15/9C$ 431
Sat 10/1010:10 a.m. -
1 stop7h 26m
Fri 16/107:15 a.m. -
1 stop9h 35m
Deal found 12/9C$ 438
Tue 20/107:35 p.m. -
1 stop8h 30m
Wed 28/106:45 a.m. -
2 stops10h 55m
Deal found 12/9C$ 442
Fri 16/107:35 p.m. -
1 stop8h 30m
Wed 21/106:45 a.m. -
2 stops15h 00m
Deal found 14/9C$ 445
Sun 18/107:35 p.m. -
1 stop8h 30m
Tue 20/108:00 p.m. -
1 stop16h 40m
Deal found 13/9C$ 446
Fri 2/107:35 p.m. -
1 stop7h 00m
Sun 11/101:20 p.m. -
1 stop8h 25m
Deal found 13/9C$ 446
Mon 19/107:35 p.m. -
1 stop8h 30m
Fri 23/106:45 a.m. -
2 stops15h 00m
Deal found 13/9C$ 447

Find flight deals from Washington to Ontario

Round-trip from

C$ 370

One-way from

C$ 156

Popular in

July

Cheapest in

January

Average price

C$ 806

Good round-trip deal

C$ 639 or less

Good one-way deal

C$ 318 or less
WestJet
  • WestJet
  • 19/10-22/10
  • 2 total stops
  • 15h 25m total
  • Washington to Ontario
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WestJet
  • WestJet
  • 22/10-31/12
  • 1 total stop
  • 7h 00m total
  • Washington to Ontario
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 245 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Washington to Ontario.
Search Deals
Price to beat on a one-way flight from Washington to Ontario.
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Cheapflights Fare Finder

 
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

Cheapest round-trip

PortlandToronto

PDX Portland - YYZ Toronto Pearson Intl

PDXYYZ

Portland

Fri 13/11

7:10 p.m.-6:52 a.m.

1 stop8h 42m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 224

PortlandToronto

PDX Portland - YYZ Toronto Pearson Intl

PDXYYZ

Portland

Wed 30/9

10:43 a.m.-9:32 p.m.

1 stop7h 49m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 226

PortlandToronto

PDX Portland - YYZ Toronto Pearson Intl

PDXYYZ

Portland

Fri 2/10

2:27 p.m.-11:59 p.m.

1 stop6h 32m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 228

PortlandToronto

PDX Portland - YYZ Toronto Pearson Intl

PDXYYZ

Portland

Thu 1/10

10:33 p.m.-9:19 a.m.

1 stop7h 46m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 229

PortlandToronto

PDX Portland - YYZ Toronto Pearson Intl

PDXYYZ

Portland

Thu 15/10

7:29 p.m.-7:00 a.m.

1 stop8h 31m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 229

PortlandToronto

PDX Portland - YYZ Toronto Pearson Intl

PDXYYZ

Portland

Tue 13/10

11:30 p.m.-9:54 a.m.

1 stop7h 24m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 229

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Thu 22/10

9:16 p.m.-5:35 a.m.

3 stops29h 19m

Ottawa

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 231

SeattleToronto

SEA Seattle/Tacoma Intl - YKF Toronto Region of Waterloo Intl

SEAYKF

Seattle/Tacoma Intl

Sat 10/10

7:35 p.m.-7:50 p.m.

1 stop21h 15m

Toronto Region of Waterloo Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 231

PortlandToronto

PDX Portland - YYZ Toronto Pearson Intl

PDXYYZ

Portland

Sat 3/10

8:40 a.m.-11:59 p.m.

2 stops12h 19m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 238

PortlandToronto

PDX Portland - YYZ Toronto Pearson Intl

PDXYYZ

Portland

Sat 10/10

7:29 p.m.-11:49 a.m.

2 stops13h 20m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 238

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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$ 386). Flying from State of Washington to Region of Ontario in July is currently the most expensive (average of C$ 817). 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?

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

The most flights from USWA to CAON are scheduled on a Monday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from State of Washington to Region of Ontario?

Airfare is below average for this route at the moment.
State of Washington to Region of Ontario flights typically cost between C$ 608 and C$ 1,029 in October.
The cheapest round-trip price found within the last 5 days was C$ 475 on WestJet (17 Oct-24 Oct).

How far ahead should I book a flight from State of Washington to Region of Ontario?

The best time to book flights from State of Washington to Region of Ontario is 59 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Ontario

Get a feel of what it's like to fly with Alaska Airlines,WestJet, andAir Canada from Washington to Ontario by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,932 reviews
Check prices

Comfort

7.8

Crew

8.5

Food

7.0

Boarding

8.1

Entertainment

7.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
Alaska Airlines
7.9
Good
12,932 reviews
Alaska Airlines
7.9
Good
12,932 reviews
Check prices

Comfort

7.8

Crew

8.5

Food

7.0

Boarding

8.1

Entertainment

7.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
WestJet
7.2
Good
3,445 reviews
Alaska Airlines
7.9
Good
12,932 reviews
Check prices

Comfort

7.8

Crew

8.5

Food

7.0

Boarding

8.1

Entertainment

7.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
Air Canada
7.1
Good
11,631 reviews
Alaska Airlines
7.9
Good
12,932 reviews
Check prices

Comfort

7.8

Crew

8.5

Food

7.0

Boarding

8.1

Entertainment

7.0

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.

Related info for your journey

  • How long is the flight from State of Washington to Region of Ontario?

    There are many flights that can get you from State of Washington to Region of Ontario in 7h 54m. Fly via WestJet, Delta, or United Airlines to get the fastest option. Airlines will cover a distance of 3364 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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 Alaska Airlines (C$ 129), Air Canada (C$ 138), and WestJet (C$ 144).

  • 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$ 386). Flying from State of Washington to Region of Ontario in July is currently the most expensive (average of C$ 817). 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

Alternative routes for Washington to Ontario

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Top 3 airlines flying from Washington to Ontario

AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 283AverageC$ 746FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
WestJetCheapestC$ 287AverageC$ 440FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 367AverageC$ 749FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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Why should you use Cheapflights to find cheap flight tickets from Washington to Ontario?

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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.

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