C$ 152 Find Cheap Flights from Ontario to Washington

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Washington

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 25% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Useful Info
Useful Info

Good to know

Low seasonMarch
High seasonAugust
Cheapest flightC$ 152
Best time to beat the crowds (4% less expensive on average)
Most popular time to fly (8% more expensive on average)
Flight from Toronto Region of Waterloo Intl to Seattle

FAQs for booking flights from Ontario to Washington

  • How does KAYAK find such low prices on flights from Ontario to Washington?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Washington.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Washington?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Washington is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Washington?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to Washington with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Washington?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in Washington?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Washington is Seattle/Tacoma Intl Airport (SEA), with an average flight price of C$ 359.

  • What is the cheapest day to fly to Washington?

    Based on KAYAK data, the cheapest day to fly to Washington is Thursday when round-trip tickets can be as cheap as C$ 551. On the other hand, the most expensive day to fly is Sunday, when round-trip prices are C$ 720 on average.

  • What is the cheapest time of day to fly to Washington?

    The cheapest time of day to fly to Washington is generally at night, when round-trip flights cost C$ 370 on average. Morning departures are around 27% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is C$ 563.

  • What is the cheapest flight to Washington?

    The cheapest ticket to Washington from Ontario found in the last 72 hours was to Seattle, at C$ 281 round-trip. The most popular route is Toronto Pearson Intl Airport (YYZ) to Seattle (SEA) and the cheapest round-trip airline ticket found on this route in the last 72 hours was C$ 281.

  • What is the cheapest month to fly from Ontario to Washington?

    The cheapest month for flights from Ontario to Washington is February, when tickets cost C$ 368 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is C$ 615 and C$ 597 respectively.

  • How far in advance should I book a flight from Ontario to Washington?

    To get a below-average price on the flight from Ontario to Washington, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

  • How long is the flight to Washington?

    An average direct flight from Ontario to Washington takes 14h 40m, covering a distance of 5272 km. The shortest route is Toronto Pearson Intl Airport (YYZ) to Seattle (SEA) with an average flight time of 5h 15m.

  • What are the most popular destinations in Washington?

    Based on KAYAK flight searches, the most popular destination is Seattle (87% of total searches to Washington). The next most popular destinations are Portland (12%) and Spokane (1%). Searches for flights to Bellingham (0%), to Wenatchee (0%), and to Pasco (0%) are also popular.

Top 5 airlines serving from Ontario to Washington

 
Need help choosing which airline to fly with from Ontario to Washington? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.1Entertainment
7.1Food
8.1Boarding
7.8Comfort
8.5Crew
Airline reviews

The crew the employees were friendly and excellent. There was a problem with the plane and they had workers there immediately working on it. They made sure the people that had immediate connects knew what gates they had to get to and had them leave the plane first. Very thoughtful.

10.0 ExcellentHelen, Jun 2025BLI - SEA
Read more Alaska Airlines reviews

The crew the employees were friendly and excellent. There was a problem with the plane and they had workers there immediately working on it. They made sure the people that had immediate connects knew what gates they had to get to and had them leave the plane first. Very thoughtful.

We waited over an hour for our luggage to arrive at the carousel in Seattle.

Like the friendliness of the crew, each flight had a very very drunk person next to me and the last flight had a very obese man pushing me into the aisle while the crew kept ending up hitting me in the shoulder with the beverage carts.

Flight was about 30 minutes delayed. All staff were friendly and professional while keeping us updated.

My screen was hard to change channels….seemed it was worn out….i just gave up and read a book I brought

Booked a first class ticket from Anchorage to Seattle but was denied complimentary access to Alaska Lounge as our 1500 mile flight wasn’t long enough’

We were lucky to be seated in an upgraded row and received free drinks!!

Everyone was very helpful. My only critique was the very hard landing in Seattle. We felt the G force.

It was absolutely terrible due to the mother and her two children sitting across from us. The 2.5 year old jumped up and down on the tray table. Every time the kid screamed the mom would grab the kid and scream even louder into his face. Horrible flight. The mother stayed on her phone playing while the kids were so destructive to others hanging over seats, she never once tried to comfort or discipline them. She never once said you cannot jump on tray table. Definitely the worst flight ever. It was my first time with Alaska Airlines.

It was great. There was legroom. The food I ordered was creative and flavorful. The crew was kind and fun. Definitely would fly with them again.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

The entertainment and wifi mostly didn't work on this flight.

Boarding was tough as we had to take a bus out to the plane and walk up a lot of stairs. Difficult with heavy carry-ons that said I got an entire empty row of seats, which was excellent for an international flight. Food was very mediocre but happy with the comfort so not complaining.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

The check in and bag drop off for Sky Priority members is slow. The Clear security was also slow - a TSA issue.

Delta is better for short flights and very low need for customer service. Avoid for longer flights

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

Very nice and clean plane. Transit time between flights was tight though

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

So far so good but food and entertainment are not available for this flight

leg space better than expected. two washrooms for one plane isn't enough.

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

Not the greatest experience everything was pretty mediocre. My seat was by the washroom in the aisle and was not located well as everyone past each other people were right in my seat and space.

The small prop plane was crowded and the overhead luggage storage is a smaller than on the jets. Other than that, the crew was good, the flight was on time and the landing was smooth.

There was a medical emergency that the crew handled very well. There was no “entertainment” of any sort-no movie/music/whatever. Food was typical of airlines: mediocre.

Late departure, so I missed connection in Detroit. But Delta gave me a great hotel & breakfast. Just sorry I could not get anything from my checked baggage.

Crew was friendly. Lost our luggage and told us it’d be in later in the evening of the day we returned. It was not. Still after 5 days have not received it.

Internet on both flights was sketchy. Thus in flight entertainment was non- existent on MN - Balrimote leg.

We never had an experience they canceled the flight and they did not offer us an alternative flight. I had to book one on my own expense. They offered us food voucher and we could not use them at the airport it kept saying not attached to an existing flight. The people at the counter were rude and cold and they did not care about our situation

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

Found the seats very crowded—too close together ! And waited a long time for our luggage All staff at both ends were excellent!!!

Flight cancelled and Kayak switched our return flight to a red eye. Ridiculous.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

I had a nice flight with free wifi. So I was able to message family members and stream music during my flight, which made the trip go by fast. I also enjoyed flying on there Airbus A220. The plane looked very new and it also got up to speed fast down the runway and didn't need much runway to get airborne.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Boarding was challenging as we had to use the stairs from the tarmac. Stairs are okay but a roller bag makes it challenging.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

I paid for a comfort class seat and was seated in economy.

My plane was cancelled and had to be rebook for the evening was not happy.

Book cheap flights from Ontario to Washington

Recent round-trip flight deals

20/8mié.
1 stopWestJet
9h 58mYKF-SEA
23/10jue.
1 stopWestJet
8h 50mSEA-YKF
C$ 268
27/8mié.
1 stopWestJet
9h 58mYKF-SEA
3/9mié.
1 stopWestJet
7h 55mSEA-YKF
C$ 269
7/11vie.
directAir Canada
5h 26mYYZ-SEA
16/11dom.
directAir Canada
4h 39mSEA-YYZ
C$ 324
29/8vie.
directAlaska Airlines
5h 22mYYZ-SEA
29/10mié.
directAlaska Airlines
4h 40mSEA-YYZ
C$ 325
30/8sáb.
1 stopAir Canada
8h 16mYTZ-SEA
5/9vie.
1 stopAir Canada
9h 34mSEA-YTZ
C$ 331
12/7sáb.
1 stopUnited Airlines
17h 51mYYZ-SEA
15/7mar.
1 stopUnited Airlines
12h 26mSEA-YYZ
C$ 366
19/7sáb.
1 stopUnited Airlines
17h 59mYYZ-SEA
23/7mié.
1 stopUnited Airlines
19h 38mSEA-YYZ
C$ 368
23/8sáb.
1 stopDelta
7h 32mYYZ-SEA
30/8sáb.
1 stopDelta
8h 08mSEA-YYZ
C$ 369
20/8mié.
directAlaska Airlines
5h 22mYYZ-SEA
23/10jue.
directAlaska Airlines
4h 42mSEA-YYZ
C$ 376
10/7jue.
1 stopDelta
9h 14mYYZ-SEA
8/8vie.
1 stopDelta
8h 10mSEA-YYZ
C$ 392

Search by stops

Search by airline

Search by price

Recent one-way flight deals

7/10mar.
1 stopWestJet
9h 59mYKF-SEA
C$ 152
23/9mar.
1 stopWestJet
9h 59mYKF-SEA
C$ 153
23/9mar.
1 stopAir Canada
10h 06mYTZ-SEA
C$ 196
29/8vie.
directAlaska Airlines
5h 22mYYZ-SEA
C$ 197
23/9mar.
directAlaska Airlines
5h 22mYYZ-SEA
C$ 198
21/6sáb.
1 stopAir Canada
8h 16mYTZ-SEA
C$ 201
15/8vie.
1 stopUnited Airlines
18h 56mYOW-PDX
C$ 219
2/7mié.
1 stopUnited Airlines
15h 11mYYZ-SEA
C$ 223
10/7jue.
1 stopDelta
9h 14mYYZ-SEA
C$ 243
3/7jue.
1 stopDelta
8h 04mYYZ-SEA
C$ 256

Search by stops

Search by airline

Search by price

Last minute flights from Ontario to Washington

Last minute flight, train and bus deals

16/6lun.
multi-stopWestJet
17h 28mYHM-SEA
23/6lun.
multi-stopWestJet
7h 36mSEA-YHM
C$ 355
17/6mar.
multi-stopWestJet
24h 28mYYZ-SEA
15/7mar.
multi-stopWestJet
7h 37mSEA-YYZ
C$ 395
17/6mar.
multi-stopUnited Airlines
17h 46mYYZ-PDX
10/7jue.
multi-stopUnited Airlines
12h 32mPDX-YYZ
C$ 396
16/6lun.
multi-stopDelta
6h 57mYYZ-PDX
9/7mié.
multi-stopDelta
8h 19mPDX-YYZ
C$ 414
17/6mar.
multi-stopDelta
11h 22mYYZ-PDX
11/7vie.
multi-stopDelta
9h 49mPDX-YYZ
C$ 417
17/6mar.
multi-stopAir Canada
8h 37mYYZ-SEA
15/7mar.
multi-stopAir Canada
9h 15mSEA-YYZ
C$ 433
14/6sáb.
multi-stopUnited Airlines
15h 13mYOW-PDX
20/6vie.
multi-stopUnited Airlines
12h 05mPDX-YOW
C$ 433
17/6mar.
directAlaska Airlines
5h 24mYYZ-SEA
15/7mar.
directAlaska Airlines
4h 43mSEA-YYZ
C$ 458
13/6vie.
directAir Canada
5h 52mYUL-SEA
15/6dom.
directAir Canada
5h 10mSEA-YUL
C$ 503
13/6vie.
directAlaska Airlines
5h 24mYYZ-SEA
22/6dom.
directAlaska Airlines
4h 43mSEA-YYZ
C$ 707

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to Washington

Cabin class types available on flights to Ontario

Cabin classes available on flights to Ontario. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.