$79 Find Cheap Flights from Washington to Ontario

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Low seasonJanuary
High seasonJuly
Cheapest flight$79
Best time to beat the crowds but there is an average 15% increase in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Seattle to Toronto Pearson Airport

FAQs for booking flights from Washington to Ontario

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

    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 Washington to Ontario.

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

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

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

    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 Washington to Ontario 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 Washington to Ontario?

    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 Washington to Ontario 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 Ontario?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Ontario is Toronto Pearson Intl Airport (YYZ), with an average flight price of $275.

  • What is the cheapest day to fly to Ontario?

    Based on KAYAK data, the cheapest day to fly to Ontario is Tuesday where round-trip tickets can be as cheap as $542. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $673 on average.

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

    The cheapest time of day to fly to Ontario is generally in the evening, when round-trip flights cost $283 on average. Morning departures are around 119% more expensive than evening flights, on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is $619.

  • What is the cheapest flight to Ontario?

    The cheapest ticket to Ontario from Washington found in the last 72 hours was to Toronto Pearson Intl Airport, at $307 round-trip. The most popular route is Seattle (SEA) to Toronto Pearson Intl Airport (YYZ) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $307.

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

    The cheapest month for flights from Washington to Ontario is September, when tickets cost $254 (return) on average. On the other hand, the most expensive months are April and November, when the average cost of round-trip tickets is $631 and $612 respectively.

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

    To get a below average price on the flight from Washington to Ontario, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

  • How long is the flight to Ontario?

    An average nonstop flight from Washington to Ontario takes 12h 11m, covering a distance of 2055 miles. The shortest route is Seattle (SEA) to Toronto Pearson Intl Airport (YYZ) with an average flight time of 4h 40m.

  • What are the most popular destinations in Ontario?

    Based on KAYAK flight searches, the most popular destination is Toronto (95% of total searches to Ontario). The next most popular destinations are Ottawa (4%) and London (1%). Searches for flights to Thunder Bay (0%) and to Timmins (0%) are also popular.

Reviews of the top 5 airlines serving from Washington to Ontario

 
Need help choosing which airline to fly with from Washington to Ontario? 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
8.1Boarding
7.8Comfort
7.1Food
8.5Crew
Airline reviews

Flight attendant was excellent, pleasant and attentive. Announcements were clear and pleasant.

10.0 ExcellentAnonymous, Jul 2025SEA - JAC
Read more Alaska Airlines reviews

Flight attendant was excellent, pleasant and attentive. Announcements were clear and pleasant.

seats good, foot space comfortable not good, waiting on tormack at Las Vegas

6 hour flight from Seattle to Dulles airport without any WiFi and movies, as well as now snacks is crazy. We were told no WiFi and entertainment 5 hours before departure.

Wifi would be nice. Unfortunately the particular airplane was not equipped with wifi.

I'm so glad that Alaska still keeps this little "puddle-jumper" route going between SEA>ALW; my daughter lives on Walla Walla, and it's so much quicker to be able to fly right in to Walla Walla than to have to fly into Tri-Cities and then make her drive 40 minutes each way. This flight is usually only 50%-75% full when I fly it, but that's because it doesn't get in to ALW until MIDNIGHT! But thanks for continuing to service the Walla Walla area, Alaska!

Seats very comfortable and legroom appreciated. All in all, it was a great experience.

Original flight was canceled, and the automatically booked second flight was immediately delayed. I arrived about 4 hours later than planned with only a $12 meal voucher that didn't fully cover a sandwich at airport prices.

I was expecting better service from Alaska Airlines. I registered for assistance since I have a disability. The terminal in Seattle, WA was very unprofessional and at times rude. The BWI location was the exact opposite. I will NOT consider Alaska Airlines for future flights.

It was very good and comfortable, Crew was also great

The flight was delayed almost an hour. No wifi on flight.

Very late arrival at PWM. Late jet getting to ATL. Equipment problem with aircraft - could not get enough water onto plane., Another delay getting FAA approval for flight with bottled H2O. Not the crew’s problem.

Everything was fine except the entertainment was not working for half of the flight.

Easy boarding with an extremely kind attendant. Seats were spacious and we had 3 seats for 2 people so we could stretch out. Comfortable air flow and very attentive and hospital attendants. Bathrooms and food were the only negative. Bathrooms were so small you could hardly get in and close the door. I don’t think an obese person would fit or a person with a movement disability. Food was the trending food for flights, nonexistent. We spent $40 getting sandwich and snack at airport for our 6 hour flught.

At first, we were on the runway for about an hour, literally. The Captain did explain that the Control Tower just had a change shift (sounds like an unrealistic excuse) and then that we had to change a runway. A regular economy seat is made for 12 yo twiggy. I understand Delta wants to push for an upgrade, but after sitting in a Comfort seat and in First class. I would say First class is not worthy of my money. The landing was delayed because of the weather in NYC, I don't hold that against Delta, of course. The Captain did alert us to that upon takeoff in Vegas and again as we reached NY.

No one fussed at me about my pap machine as a 3rd pice on the plane. Boarding was pleasant and smooth. The boarding agent in Anchorage was a fun character- he could be in a movie. :~) The on-board crew were downright pleasant. No militant attitudes on Delta. Like all planes these days the seats are too narrow for standard Americans and at 5’2” there is barely enough leg room. I don’t know how tall people fold themselves into the seats. But that’s nothing specific to Delta

Great. Very smooth. Plenty of information. However, wish they would give out a menu in advance of making a dinner choice like other international airlines. The flight attendant says chicken or pasta and there are details about ingredients or spices requiring the passenger to ask which requires the flight attendant to answer many times. So easy to solve this problem. P

I'm a tall guy and even the seats with more leg room were not as comfortable as I had hoped.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

After all the weather issues at least they got me to my destination the next day

Flight was actually on Air Canada. The flight itself was fine. Nothing special. Food was pretty pathetic except for cookies. They offered plenty of food and drinks but just wasn't very good. Even for airline food.

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Delay and keep changing gates. I have to run around from B to C then to E.

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

My suitcase was completed destroyed. The top part is broken and unusable now.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

I do prefer to fly United and have always had excellent service, except for bad weather. Flights are on time and staff is alway curtious and helpful

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

All male crew was just too woke for me. I felt like a sardine. I will never take a window seat or the rearmost seat again. I booked early and did not pay for seat selection and that was a mistake. The security at IAH was atrocious. I was violated and radiated as I was in a hurry to connect to my other flight. I may have lost items under the seat in front of me that I couldn't see nor bend over to look.

Crew was nice especially by North American standards. Bad good. No entertainment screens. Terrible WiFi

The seats very Uncomfortable, no meal and no entertainment for a 4Hours flight. Smooth Flight, Great Take off and landing. Superb crew!

The flight attendants were super! They created a cosy and warm flight atmosphere!

West Jet flight was cancelled and I was not notified. I found out when I tried to check in on-line. Spent 4 hours on the phone with West Jet and Just Fly trying to figure what happened.

It was good, flight was on time, boarding was smooth and done in zones, food was good too but there was no form of entertainment. Luggage’s were intact. So an overall good flight

Flight was delayed 3 times. Then cancelled due to pilot being timed out. They refused hotel vouchers. Gate attendants were very rude and could not help you at all.

No access to any entertainment No food other than a cookie or pretzels even tho flight was over the supper hour Seats very close together and very little leg room Staff was very good

The cancelation of my flight from Toronto to Edmonton without any solution given to me for my next flight. Very poor connection from Toronto to Edmonton

Too squished in seats. I'm 110 lbs and 5'6....can't imagine being any bigger and flying

Scrooge airlines spoiled my last chance at Christmas with my 95 and 92 year old folks. and rest of the family in Calgary. Ticket personnel would not let me on without a passport and I always visit Canada with my enhanced driver;s License when I travel from the US

I was forcefully re-routed to another destination and was delayed a total of 8hours. I have still not received my bags, no one is taking responsibility. The agents at the airport lied to me that I will get to my destination same time as my previous flight where I was forcefully re-routed from.

Flight was delayed by 1.5hrs. Once inside, people had their small handbags on the storage. The crew (male guy) was not helpful in making some space in the storage. Instead, he asked few bags to be checked-in and it was not a great experience. No attempt to help but just followed the things with a straight face. People had their literally small bags and he wouldnt not move from one storage to another even if there was space and would not let us do i as well. Once flight was on, they ran out of Orange juice, really running out of orange juice when the temp were 32.degrees outside. didnt made the sense. Onasking for a extra snack, he made a face as if he was giving me out of his pocket. if the flight was delayed, there could have an attempt to provide something extra incase people did asked.

Our flight was canceled at the last minute. Someone on the flight said the exact same thing happened to her the day before. I will say they helped us book a flight on another airline so that we could still make our vacation with little delay.

We had a very long delay. First the inbound flight took a while, then maintenance, they “fixed it” to then do boarding and leave the gate, and waste a lot of time to have to go back to the gate and eventually deplane. Had to wait for a new aircraft, wait for a gate, and do the whole thing again. Instead of leaving at 9:50am we left until past 1. I could’ve not woken up at 5am, or spend some more time with my family if they gave more grace period of time between flights to give some time in case of any issues. But they have to make all and every dollar possible

Abandoned me in hallway in a wheelchair… which I asked for because I sprained my back. After waiting in the hallway, I decided to walk the rest of the way since someone respecting me up.. My experience with the united was totally the opposite. Wheelchair access, propped swift and save me a lot of grief. Air Canada totally disorganized.

Bad experience boarding and flight got delayed didn’t make it to my next flight

The food on the trip Toronto to Athens could be better: the chicken didn’t taste good.

Conflicting information provided about baggage allowance. One screen said I had a carry on and another said I didnt.

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

The staff made sure I was comfortable, moved me to a better seat with more leg room

Book cheap flights from Washington to Ontario

Recent round-trip flight deals

9/18Thu
1 stopWestJet
7h 55mSEA-YKF
9/22Mon
1 stopWestJet
9h 59mYKF-SEA
$206
9/5Fri
1 stopWestJet
7h 12mSEA-YYZ
9/14Sun
1 stopWestJet
8h 48mYYZ-SEA
$214
9/4Thu
2 stopsAir Canada
10h 06mSEA-YTZ
9/10Wed
1 stopAir Canada
10h 06mYTZ-SEA
$241
9/5Fri
2 stopsAir Canada
11h 20mPDX-YYZ
9/11Thu
2 stopsAir Canada
11h 21mYYZ-PDX
$245
9/19Fri
1 stopUnited Airlines
14h 15mPDX-YYZ
9/20Sat
2 stopsUnited Airlines
18h 01mYYZ-PDX
$308
9/19Fri
1 stopUnited Airlines
10h 20mPDX-YYZ
9/22Mon
1 stopUnited Airlines
17h 49mYYZ-PDX
$322
8/22Fri
1 stopDelta
7h 25mPDX-YYZ
8/29Fri
1 stopDelta
10h 08mYYZ-PDX
$341
9/2Tue
1 stopAlaska Airlines
15h 09mGEG-YYZ
9/9Tue
1 stopAlaska Airlines
9h 01mYYZ-GEG
$354
9/2Tue
2 stopsAlaska Airlines
23h 21mGEG-YYZ
9/9Tue
1 stopAlaska Airlines
9h 01mYYZ-GEG
$364
8/22Fri
1 stopDelta
8h 29mGEG-YYZ
8/27Wed
1 stopDelta
7h 47mYYZ-GEG
$365

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Recent one-way flight deals

9/21Sun
1 stopWestJet
8h 16mSEA-YYZ
$79
9/20Sat
2 stopsAir Canada
12h 36mSEA-YYZ
$88
9/20Sat
1 stopAir Canada
8h 19mSEA-YYZ
$92
9/7Sun
1 stopWestJet
8h 16mSEA-YYZ
$94
9/21Sun
nonstopAlaska Airlines
4h 44mSEA-YYZ
$101
11/15Sat
2 stopsUnited Airlines
13h 16mSEA-YYZ
$125
8/5Tue
nonstopAlaska Airlines
4h 43mSEA-YYZ
$129
7/18Fri
2 stopsUnited Airlines
14h 42mPDX-YYZ
$144
7/31Thu
1 stopDelta
8h 10mSEA-YYZ
$153
10/3Fri
2 stopsDelta
12h 16mGEG-YYZ
$165

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Last minute flights from Washington to Ontario

Last minute flight, train and bus deals

7/17Thu
multi-stopWestJet
7h 17mSEA-YYZ
7/24Thu
multi-stopWestJet
8h 50mYYZ-SEA
$247
7/17Thu
multi-stopWestJet
8h 51mSEA-YKF
7/24Thu
multi-stopWestJet
27h 43mYKF-SEA
$270
7/17Thu
multi-stopAir Canada
8h 50mPDX-YYZ
7/20Sun
multi-stopAir Canada
14h 55mYYZ-PDX
$337
7/17Thu
multi-stopAir Canada
8h 50mPDX-YYZ
7/23Wed
multi-stopAir Canada
9h 50mYYZ-PDX
$365
7/14Mon
multi-stopUnited Airlines
8h 50mPDX-YYZ
7/25Fri
multi-stopUnited Airlines
15h 42mYYZ-PDX
$380
7/14Mon
multi-stopUnited Airlines
15h 58mPDX-YYZ
7/25Fri
multi-stopUnited Airlines
9h 05mYYZ-PDX
$390
7/16Wed
multi-stopDelta
8h 19mPDX-YYZ
7/23Wed
multi-stopDelta
8h 56mYYZ-PDX
$406
7/17Thu
multi-stopDelta
8h 10mGEG-YYZ
7/24Thu
multi-stopDelta
11h 39mYYZ-GEG
$434
7/17Thu
nonstopAlaska Airlines
4h 43mSEA-YYZ
7/24Thu
nonstopAlaska Airlines
5h 24mYYZ-SEA
$574
7/13Sun
multi-stopAlaska Airlines
15h 12mGEG-YYZ
7/18Fri
multi-stopAlaska Airlines
7h 24mYYZ-GEG
$576

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Everything you need to know for your flight to Ontario

Cabin class types available on flights to Washington

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

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