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Find cheap flights from Seattle to Ontario from C$ 116

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Ontario departing on 29/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sun 2/6
Sun 9/6

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Best Ontario Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Toronto
Toronto1 stopC$ 311
Ottawa
Ottawa2 stopsC$ 647
London
London1 stopC$ 717

Good to know

Low season

January

High season

July

Cheapest flight

C$ 116
Best time to beat the crowds (22% less expensive on average)
Most popular time to fly (26% more expensive on average)
Flight from Seattle to Toronto Pearson Airport

FAQs - booking Ontario flights

  • How does KAYAK find such low prices on flights from Seattle 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 Seattle to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Seattle 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 Seattle 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 to Ontario with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle 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 to Ontario from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Ontario

  • Morning departure is around 7% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Seattle to Ontario

 
Need help choosing which airline to fly with from Seattle 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.
8.3
EVA AirOverall score based on 1542 reviews
8.2Comfort
8.0Food
8.4Boarding
8.6Crew
8.0Entertainment
Airline reviews

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

10.0 ExcellentDamian, Mar. 2024LAX - TPE
Read more about EVA Air reviews

Fast and efficient boarding. Flight was on time. Service was very good for our long flight. First time flying with this airline and I would highly recommend.

Eva Air's Business Class is pretty decent. With the given price, I think that the food can be better.

Pleasant, comfortable, and entertaining. All told, ZERO issues with it. And sadly, so far the flight was WAY more comfortable than the hellhole that is "Lambug Beach Resort" at Badian Beach!

It was a pleasant fly with Eva Air from NYC to Taipei. The crew were friendly and the food was exceeded my expectation.

Eva air is a good airline. The seats on the way to Taipei could have certainly been more comfortable, but all in all it was a pretty good experience.

Overall the flight was what might be expected for a long haul flight to Asia in economy class. The cabin crew was attentive and the food was good. Boarding was fairly fast and easy. The one thing I found frustrating was the EVA app. It is terrible. Trying to do anything on it was almost impossible.

EVA would not help with ticket issue since they were purchased through a travel agency. Even though it was EVA ticket stock. Travel agency Budget Air didn't reissue ticket after airline change which I didn’t learn until trying to checkin on Christmas Day and there was no contact number for the agency to help. I will never use Budget Air to purchase flight again and disappointed in EVA’s refusal to help. Thankfully just under 12 hrs before departure someone from the agency was available to reissue tickets. I was starting to think we would not be flying and the stress trying to resolve was completely unacceptable.

seamless check in/ friendly staff, food is good, always love flying Eva Air

Very uncomfortable and crowded seats in economy. Flight attendant refused request to move to nearby unused seat with more legroom because “It was more money for that seat”. It was also near impossible to reach airline directly by phone. Waits upwards of an hour and not very helpful customer service representatives after long wait. Cannot recommend this airline.

My experience with Eva sir was good except the long walk in LA Lex, that was inconvenient for my age,

I commend the flight attendants on our SFO-SIN flight who went above and beyond to provide us with extra snacks and food. This type of service makes the flight experience personal and awesome.

It was a great flight Food was great Crew was spectacular

In general good, but the machine seems to be long in operation and some functions were restricted as e. g. Adjusting of seats.

Seating cramped; close to toilet, foul smelling and noisy, very unhygienic and disease risk Free and paid Wi-Fi NOT accessible at all - misleading advertising Very expensive sunglasses disappeared from back seat pouch. Coffee disgusting and cold

People were so nice! Economy seats were small and cramped feeling for me. I’m slender and 6 feet tall

The singapore airline now compared before covid, I like the service before covid. SQ was the best of all airlines but now I am going to look for different airline if I am travelling in asia.

They are great with every aspect of customer service. Helped my elderly father and aided him with using the restroom.

Due to the delay of my first flight, my connecting flight with JetBlue was canceled by Singapore Airlines, but the JetBlue crew was very accommodating and rebooked a seat for me. The crew was very nice and had good attitude.

Very slow check in. Food poor and some of the special meals offered were not available. Luggage then didnt arrive and still waiting for news 48 hours later

Check in was snails pace, only 1 of the luggage screen was working so long lines, an hour to check in Nobody seemed to want to fix the issue Flight was 45 minutes late Scoot is a mini sized plane ( sardine class plane), literally felt slammed between people

The ride was good but no food ot entertainment hence, it was just over an hour flight.

Positive: Entertainment via phone on the short was great and my first time. Good food and wine and head phones for free. Negative: Seat hardly reclined on the long flight. Breakfast was an egg with a bun. No egg choices and rather have something sweet like bun/jam and Youghurt.

Aircraft has better leg room than any of United's larger planes. We had requested mobility assistance for this and related flights. United's response to all was superb.

No snacks served! Seating in the kast row in uncomfortable.

By in large it was a good experience. The flight crew was great and that's the most important to me. Boarding was fine.

Flight was fine, it was delayed but only 30 minutes, staff were efficient, lady making announcements at LAX was really hard to understand but the rest were great.

The male air hostess was rude and didn’t even offer me a drink. Poor customer service!

We left really late. Things that were out if anybody’s control I guess.

The weather caused a delayed but I was impressed how United did everything they could to try to get us out which included bussing us to the plane doing a Hardstand and bringing us to the plane since the fog was too thick to tow the plane from the overnight stay in the cargo area.

Food was really good. Chicken curry delicious. Great service. Had 3 seats, what a pleasure. What about a healthier desert option on the dinner? Yogurt, fruit? Thankyou

All four American Airlines flights I took in last seven days were delayed. Caused me loads of problems, missed meetings, loss of time and money.

American cancelled our flight home. Zero option for hotel, alternative transportation and took 3 hours to find our bags so we could take a 3 hour UBER ride home on our dime. Never flying AA again.

They gave my seat away although it was a connecting flight with them and the flight was a bit delayed.

Flight was cancelled had to move to another gate late again no internet paid for the month and never can use it waste of money

Not being able to purchase my check in baggage online was a negative.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

WiFi connected but only let you go to the AA website, not even text messaging worked.

Too bad that first class seats do not recline significantly causing discomfort

I think the seats on some of their planes are uncomfortable. You can be ok on a short flight of two hours but no more than that. The delays, and also the refreshments on the plane were not enough.

Flight delayed over an over all day until it cancelled at 1:30am. Would not repeatedly delay that late. Offer hotel rooms and rebook early. Very difficult for families with small children

You do not have a space for flight cancelled. BUT!!! Air Canada handled it great. Was booked on another airline for the next day. The original flight was booked solid. But he precheck by the maintenance found a mechanical problem and the plane was not safe to fly. It was an inconvenience to have to wait until next day but I would rather arrive safely.

Very good other than we have to wait for one crew and we’re delayed and the pilot and his co- pilot has to make a difference to be right on time arrival. Disappointed about no food service also.

I had written all my complaints on my trip from Grand Junction to Denver so I will repeat it here! I was absolutely appalled that I had to pay for a regular seat that I choose 24 hrs before boarding! Also I checked my large bag which I had to pay for as well, and by the time I boarded all the room in the bins were gone so also had to check that one. I noticed people pulling out oversized suitcases, bigger than the measurements stated for carry on, and also large pack packs stuffed full! So these people were taking up 2 or 3 spaces that the rest of us should have been able to use but couldn’t! NoTV on the flight! Thankfully I had downloaded the United Airlines app and was able to watch movies on my phone. Don’t remember the last time I flew in a plane with no movie screens!

The crew was friendly, the seats are too small. Air travel is barely tolerable anymore.

Food was icecold or frozen including breakfast. Hopeless service. Rude crew.

The flight was very uncomfortable and there was no snacks served for the 13 hours international flight. In addition, the flight was delayed 3 hours

Due to a strike taking place with the airline, it negatively impacted my flight in multiple ways. My flight was delayed over 2 hours and the food served was mediocre at best.

Cabin crew were great. Seats are criminal for tall people

My flight was great! Gate attendants and crew were great… pleasant and in good spirits. Flight delayed several hours and we were well informed of the status while on plane. Thank you!

The fact that I got to Toronto alive and well and safe is a huge plus. I thank the captain and crew for a safe flight The comfort of the aircraft leaves much to be desired. Human beings should not have to be that cramped and squashed on a flight that we pay a lot for and even have to pay for lousy food choices The cabin crew were pleasant and helpful Kudos to them as the flight was packed to capacity and there was a lot of work for them in a short space of time All in all a good experience, but too cramped

Book cheap flights from Seattle to Ontario

Recent round-trip flight deals

29/5Wed
1 stop
29h 55mSEA-YYZ
4/6Tue
1 stop
15h 32mYYZ-SEA
C$ 311
29/5Wed
1 stop
18h 07mSEA-YYZ
4/6Tue
1 stop
15h 12mYYZ-SEA
C$ 325
17/6Mon
directAir Canada
4h 38mSEA-YYZ
18/6Tue
1 stopAir Canada
8h 34mYYZ-SEA
C$ 588
24/6Mon
directAir Canada
4h 40mSEA-YYZ
28/6Fri
1 stopAir Canada
8h 05mYYZ-SEA
C$ 617
28/7Sun
1 stopDelta
7h 55mSEA-YYZ
5/8Mon
1 stopDelta
7h 16mYYZ-SEA
C$ 647
25/6Tue
1 stopDelta
8h 13mSEA-YYZ
2/7Tue
1 stopDelta
10h 29mYYZ-SEA
C$ 696
1/6Sat
1 stopAmerican Airlines
8h 27mSEA-YYZ
9/6Sun
1 stopAmerican Airlines
8h 53mYYZ-SEA
C$ 711
30/5Thu
1 stopAmerican Airlines
8h 27mSEA-YYZ
4/6Tue
1 stopAmerican Airlines
7h 46mYYZ-SEA
C$ 721
5/8Mon
1 stopUnited Airlines
13h 34mSEA-YOW
12/8Mon
1 stopUnited Airlines
17h 49mYOW-SEA
C$ 994
5/8Mon
1 stopUnited Airlines
13h 34mSEA-YOW
12/8Mon
2 stopsUnited Airlines
18h 42mYOW-SEA
C$ 1,232

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Recent one-way flight deals

29/5Wed
1 stop
29h 55mSEA-YYZ
C$ 116
11/6Tue
1 stop
17h 46mSEA-YYZ
C$ 151
16/7Tue
directAir Canada
4h 40mSEA-YYZ
C$ 273
23/5Thu
1 stopAir Canada
9h 16mSEA-YYZ
C$ 280
5/6Wed
1 stopDelta
7h 59mSEA-YYZ
C$ 286
1/6Sat
2 stopsDelta
10h 49mSEA-YYZ
C$ 295
10/6Mon
1 stopAmerican Airlines
8h 20mSEA-YYZ
C$ 322
31/5Fri
1 stopAmerican Airlines
8h 27mSEA-YYZ
C$ 323
13/5Mon
2 stopsUnited Airlines
18h 23mSEA-YOW
C$ 378
13/6Thu
1 stopUnited Airlines
10h 20mSEA-YYZ
C$ 410

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Last minute flights from Seattle to Ontario

Last minute flight, train and bus deals

8/5Wed
multi-stop
30h 00mSEA-YYZ
21/5Tue
multi-stop
15h 45mYYZ-SEA
C$ 602
7/5Tue
multi-stop
17h 57mSEA-YYZ
14/5Tue
multi-stop
15h 25mYYZ-SEA
C$ 611
8/5Wed
multi-stop
30h 00mSEA-YYZ
25/5Sat
multi-stop
27h 45mYYZ-SEA
C$ 650
5/5Sun
multi-stopAir Canada
7h 06mSEA-YXU
11/5Sat
multi-stopAir Canada
7h 43mYXU-SEA
C$ 761
5/5Sun
multi-stopAir Canada
7h 06mSEA-YXU
10/5Fri
multi-stopAir Canada
9h 27mYXU-SEA
C$ 767
8/5Wed
multi-stopAmerican Airlines
8h 27mSEA-YYZ
17/5Fri
multi-stopAmerican Airlines
9h 56mYYZ-SEA
C$ 844
5/5Sun
multi-stopDelta
9h 49mSEA-YYZ
9/5Thu
multi-stopDelta
9h 04mYYZ-SEA
C$ 952
7/5Tue
multi-stopDelta
10h 49mSEA-YYZ
15/5Wed
multi-stopDelta
7h 26mYYZ-SEA
C$ 1,022
8/5Wed
multi-stopAmerican Airlines
10h 14mSEA-YYZ
11/5Sat
multi-stopAmerican Airlines
16h 31mYYZ-SEA
C$ 1,110
8/5Wed
directUnited Airlines
4h 38mSEA-YYZ
24/5Fri
directUnited Airlines
5h 18mYYZ-SEA
C$ 1,558

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Seattle - Ontario Flights

Departure:

Seattle (SEA)United States

Return flight deals:

Ontario - Seattle

Cabin classes:

C$ 4,057
C$ 303