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Find cheap flights from Seattle to Ontario from $162

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 7/13. 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
Sat 6/29
Sat 7/6

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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 stop$277
Ottawa
Ottawa1 stop$424
Thunder Bay
Thunder Bay1 stop$522
London
London1 stop$519

Good to know

Low season

February

High season

August

Cheapest flight

$162
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Seattle to Montreal

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 29% 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 1500 reviews
7.9Food
8.0Entertainment
8.4Boarding
8.6Crew
8.2Comfort
Airline reviews

Their announcement was not quite clear in Chinese. The rest is pretty good.

8.0 ExcellentYue, May 2024IAH - TPE
Read more about EVA Air reviews

Their announcement was not quite clear in Chinese. The rest is pretty good.

The hygiene of the bathrooms were terrible. Urine smells leaked out into the cabin and the seats were really tight, even for a petite woman like myself. Flight attendants did not go through the cabin enough to offer refreshments.

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

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

Fine. Though no food or entertainment so the survey needs to be updated with those options.

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Standard flight experience, but there is only power at the seat to row 20 on the aircraft, on my initial check in it did not say that was the case

I feel like they have upgraded the app since I last flew United and I found it to be super helpful. I had stopped flying United unless absolutely necessary and my experience on this trip indicates they have been working hard to improve their services.

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.

28 hour delay at Fort Worth/Dallas airport, part due to weather which was unavoidable, but various other reasons - no pilot, no fa, mechanical problem, plane too small, too big, crew out of flying time, seat configuration problems.... endless and hourly updates with a different excuse. Finally told us about 3.00 am, that the flight was delayed to hours later.

Experience was bad. 3.5 hour delay for a 2.5 hour trip. There was no r Transparency about the reason for the delay and it was done 30 mins at a time.

Original flight delayed several times and finally canceled at 2:30 in the morning. Staff at the gate was not very helpful in resolving problems or communicating why there were delays. I spent 34 hours at the airport before I could leave, they couldn't book me on another early flight even after canceling my original flight. Next flight available after my original flight was canceled was 22 hours later. I will never fly American Airlines again.

very very tight seats unfriendly crew who do not seem to care about the comfort of their passengers and do not know how to smile poor ground staff support at LHR and PHX

The boarding process and flight were great. However, I waited about 40 minutes for my luggage. It did not come up on the designated belt. Instead, everyone’s bags were on a cart. Not sure what the issue was, but we were not informed until another passenger went looking for her bags and found them.

There were delays on both ends. It made it less than excellent. This plane was great though

AA1537 the AC was not working properly. It was very hot and uncomfortable.

So uncomfortable to sit in the tiny space on a long, international. Food was rough. Please, less white flour and processed food.

Worst experience flying American Airlines. I fly with them often, so I was super disappointed in the service I received at gate 30 in LGA on May 24, mid-day. The flight was delayed twice. I was patiently waiting in the American Airlines lounge when I received the notice on my app that the plane was boarding 45 minutes before its newly re-scheduled take off of 4 pm (from the orginal 1:45 pm then 3:00 pm). It took me 5 min to travel from the lounge to the gate and when I arrived there at 3:20 flight gate attendant told me the flight had closed and that they announced for passengers multiple times. I showed them the notification on my app and they were really rude and unempathetic. The person who rescheduled my flight at customer service wasn't any happier but was at least helpful in getting me on the next flight.

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Unable to initiate refund/reschedule the ticket #worst experience #lost 900$

Flight was delayed for almost 3 hours. Communication of gate change was poor. Email and screen said one gate and it was a different gate from that. Gate changed first to 64 B and then to 64 C. Originally it was 68B. 64C was not communicated properly!

This was a red eye return, so I doubt there would be anyway to make it better. Other than adding beds.

Direct nonstop flight was great. Flight was delayed and the crew announced a 2h delay on the sound system. 30 min or so later I hear my name on the sound system for immediate board. Several other passangers were late too. Reason: The crew incorrectly announced a 2h delay when in reality they meant a new boarding time at 2pm.

Flight was on time early arrival better entertainment good staff.everything was excellent

Excellent host on board. Not so friendly check-in staff. Older plane with no food or entertainment due to short flight. Friendly captain and crew.

I don’t think there was entertainment? No mention of it. It was a good flight. Only complaint was my seat cushion was not attached and kept slipping.

It took 66 hours to get from Seattle to Tel Aviv. As a minor, I was left for more than 12 hours in Toronto and Frankfurt without hotel and food vouchers. It took 5 layovers. It was insane and not okay

Flew SEA-CA, then CA-NRT. First flight was short but very uncomfortable, dirty, and had very small overhead storage space. The seats and fans were not cleaned and had visible dirt on them. Second flight was perfect.

My second flight ended up being through United and it was fine. Again, just frustrating that it was so late.

Book cheap flights from Seattle to Ontario

Recent round-trip flight deals

6/11Tue
1 stop
17h 46mSEA-YYZ
6/18Tue
1 stop
23h 12mYYZ-SEA
$277
6/10Mon
1 stop
29h 46mSEA-YYZ
6/19Wed
1 stop
9h 44mYYZ-SEA
$284
8/9Fri
1 stopDelta
8h 04mSEA-YYZ
8/24Sat
1 stopDelta
10h 28mYYZ-SEA
$456
7/30Tue
nonstopAir Canada
4h 40mSEA-YYZ
8/21Wed
1 stopAir Canada
9h 04mYYZ-SEA
$472
8/9Fri
1 stopDelta
8h 04mSEA-YYZ
8/23Fri
1 stopDelta
9h 05mYYZ-SEA
$475
7/29Mon
1 stopUnited Airlines
8h 22mSEA-YYZ
8/20Tue
1 stopUnited Airlines
7h 41mYYZ-SEA
$491
8/6Tue
1 stopAir Canada
7h 51mSEA-YOW
8/12Mon
1 stopAir Canada
7h 58mYOW-SEA
$515
7/4Thu
1 stopUnited Airlines
16h 35mSEA-YOW
7/11Thu
1 stopUnited Airlines
8h 24mYOW-SEA
$524
8/12Mon
1 stopAmerican Airlines
11h 38mSEA-YUL
8/16Fri
1 stopAmerican Airlines
15h 10mYUL-SEA
$574
7/8Mon
1 stopAmerican Airlines
11h 37mSEA-YUL
7/23Tue
1 stopAmerican Airlines
9h 28mYUL-SEA
$624

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Recent one-way flight deals

7/13Sat
1 stop
17h 11mSEA-YUL
$162
9/25Wed
1 stopWestJet
8h 08mSEA-YKF
$167
6/26Wed
1 stopDelta
8h 12mSEA-YYZ
$179
7/1Mon
1 stopDelta
8h 11mSEA-YYZ
$223
8/12Mon
1 stopAir Canada
7h 51mSEA-YOW
$228
8/23Fri
1 stopAmerican Airlines
9h 13mSEA-YYZ
$239
6/6Thu
1 stopAir Canada
7h 06mSEA-YXU
$251
8/11Sun
1 stopUnited Airlines
13h 34mSEA-YOW
$253
7/14Sun
1 stopUnited Airlines
7h 14mSEA-YUL
$264
6/8Sat
1 stopAmerican Airlines
9h 14mSEA-YYZ
$282

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Last minute flights from Seattle to Ontario

Last minute flight, train and bus deals

6/4Tue
multi-stop
30h 02mSEA-YYZ
7/10Wed
multi-stop
15h 35mYYZ-SEA
$358
6/4Tue
multi-stop
30h 02mSEA-YYZ
7/10Wed
multi-stop
9h 26mYYZ-SEA
$372
6/3Mon
multi-stopDelta
7h 59mSEA-YYZ
7/10Wed
multi-stopDelta
9h 09mYYZ-SEA
$507
6/4Tue
multi-stopDelta
7h 59mSEA-YYZ
6/10Mon
multi-stopDelta
8h 29mYYZ-SEA
$515
6/3Mon
multi-stopAir Canada
6h 56mSEA-YXU
6/11Tue
multi-stopAir Canada
7h 43mYXU-SEA
$534
6/3Mon
multi-stopAir Canada
7h 06mSEA-YXU
6/11Tue
multi-stopAir Canada
9h 27mYXU-SEA
$539
6/3Mon
multi-stopAmerican Airlines
10h 44mSEA-YYZ
7/24Wed
multi-stopAmerican Airlines
9h 18mYYZ-SEA
$922
6/4Tue
multi-stopAmerican Airlines
11h 09mSEA-YYZ
6/9Sun
multi-stopAmerican Airlines
10h 12mYYZ-SEA
$994
5/31Fri
nonstopUnited Airlines
4h 38mSEA-YYZ
6/4Tue
multi-stopUnited Airlines
11h 52mYYZ-SEA
$1,052
5/31Fri
multi-stopUnited Airlines
17h 36mSEA-YYZ
6/2Sun
nonstopUnited Airlines
5h 18mYYZ-SEA
$1,094

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Seattle - Ontario Flights

Departure:

Seattle (SEA)United States

Return flight deals:

Ontario - Seattle

Cabin classes:

$1,469
$1,522
$197