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Find cheap flights from Ontario to Washington from $44

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Washington departing on 5/21. 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
Tue 6/4
Tue 6/11

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Best Washington Flight Deals

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

Seattle
Seattlenonstop$58
Spokane
Spokane1 stop$266
Pasco
Pasco1 stop$308
Bellingham
Bellingham1 stop$322
Pullman
Pullman1 stop$627
Wenatchee
Wenatchee1 stop$377
Walla Walla
Walla Walla1 stop$402
Portland
Portlandnonstop$58

Good to know

Low season

January

High season

July

Cheapest flight

$44
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Ontario to Seattle

FAQs - booking Washington flights

  • 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 to Washington from 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 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 to Washington with an airline and back to Ontario 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 to Washington from Ontario 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 Washington

  • Looking for a cheap flight? 25% of our users found tickets from Ontario to the following destinations at these prices or less: Seattle $123 one-way - $146 round-trip
  • Morning departure is around 64% 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 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.
8.2
China AirlinesOverall score based on 941 reviews
8.3Boarding
8.0Comfort
8.6Crew
7.8Food
8.1Entertainment
Airline reviews

Comfort was left wanting due to such a long flight, made the wife and I wish we could upgrade the seats to Business class or First Class, but did not have that option. Food was good but had very limited options and I have a dietary restriction which was difficult for the staff to accommodate since everything provided came with cheese on it. (Cheese could potentially kill me) Did not have an option to inform the staff until we were already in the air about the restriction and was not provided another option before flight departed.

8.0 ExcellentMichell, Feb 2024TPE - LAX
Read more about China Airlines reviews

Comfort was left wanting due to such a long flight, made the wife and I wish we could upgrade the seats to Business class or First Class, but did not have that option. Food was good but had very limited options and I have a dietary restriction which was difficult for the staff to accommodate since everything provided came with cheese on it. (Cheese could potentially kill me) Did not have an option to inform the staff until we were already in the air about the restriction and was not provided another option before flight departed.

The plane was uncomfortable. I paid extra for more legroom but the seat was still uncomfortable. Other seats on the same exact row didn’t have to pay extra but still have extra legroom. I didn’t understand why I needed to pay $170 for. It was Iike China airline just wants to make money off their passengers. It was unfair.

Liked that I could pick my seat and have a special meal without an extra charge. Luggage is reasonable for overseas trip. What could have been better is boarding and leaving on time.

Great flight, although I flew out of ONT and that is where my car is, lol

Staff is friendly, great variety of entertainment, check in a little messy but due to people not listening. Overall a pleasant experience. Would use again in the future.

Ask flight attendant for water during flight and she was a little rude get the water.

Baggage made it successfully to destination despite short layover. Appreciate that.

Staff were good and nice. There should me 3 meals instead of only 2 and snacks.

Excellent staff made the boarding process fast and easy. Friendly crews on both flights from Saigon to Taipei and Taipei to Los Angeles. Will fly China Airlines again.

For a long-haul flight, the crew did a very good job of keeping the lavatories clean and the aisles clear.

Delta is one of the best airlines I have flown

Flight delayed about 2 hrs so it made it a VERY late night

Standard economy seats on Deltas 767 were better than Alaska premium seats on their 737 MAX9; more legroom, wider seats. Entertainment was great, no ipad or phone required. Could have included a meal service.

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Flight was on time, the crew was personable & professional, & the plane arrived early which was nice.

This flight landed early, but deplaned late. We were stuck sitting and waiting for a gate for over an hour

My flight was very clean and the location was comfortable. The service was great. A satisfying flight!

The flight was overbooked and the staff at the gate started calling for volunteers to drop out and offering incentives. That delayed the flight

I appreciated being upgraded. I was very disappointed with my 13 hr layover in Seattle to geg, while my friends who flew Alaska made it home as scheduled. I had to reserve a hotel on my dime.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

I just wrote a text which was supposed to be for the flight from Denver to spokane not Frankfurt to Denver.

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Awful. I got stuck next to a person carrying a dog and behind someone with a dog. People need to board these dogs downstairs. The cabin is crowded enough with your pets

Packed in like sardines, very uncomfortable. Sitting the aisle my shoulder was rammed into numerous times by rushing flight attendants. Also flight was very cold.

the head jack on my seat didn't work and the power outlet didn't work for my seat

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

i suspect i caught flu on this flight as i could hear someone coughing a few rows back and ended up with flu a few days later. also tiresome to have to watch movies on my device by holding up smartphone screen, would have liked to have in seat display.

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

The staff was unprofessional and didn’t communicate very well. The boarding process was very disheveled, potentially due to a power outage the previous day but there was no contingency plan to properly get passengers boarded the following day. Once boarded the aircraft stayed on the tarmac for over 45 minutes due to high winds. The communication was sporadic but an announcement was finally made an additional 30 minutes later that the flight was cancelled but we couldn’t get off the plane. Prior to deplaning one of the gate agents came on the plane and made an announcement for everyone to pickup their checked bags and take a card to rebook a new reservation because they didn’t have adequate staff. Flights were missed, passengers went to different airports and there was little to no assistance from AA.

I had trouble finding a boarding pass because I had an hour between Flights and American did not see my flight I believe because I was ticketed through KAYAK. I did not have enough time to go to the desk before boarding so I went to the desk and told them while I was boarding and they had a boarding pass for me within three minutes. Nice. I paid extra to have more legroom and it is definitely worth it for a six hour flight. I would’ve paid for a decent dinner, but they didn’t offer anything but a snack box —not good for six hours.

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Terrible. Seats are bad and the baggage policy is inconsistent

Better than I expected but I did pay for a seat and carry on bags ahead of time.

I hope to avoid flying with them in the future. First flight got cancelled then got stuck with a 13 hour layover in Denver. The process was long and frustrating to many people.

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

Book cheap flights from Ontario to Washington

Recent round-trip flight deals

5/31Fri
nonstopFrontier
2h 53mONT-SEA
6/1Sat
nonstopFrontier
2h 44mSEA-ONT
$88
5/21Tue
nonstopFrontier
2h 53mONT-SEA
5/30Thu
nonstopFrontier
2h 44mSEA-ONT
$90
6/4Tue
nonstopAlaska Airlines
2h 41mONT-SEA
6/11Tue
nonstopAlaska Airlines
2h 32mSEA-ONT
$157
6/25Tue
1 stopDelta
5h 27mONT-SEA
7/10Wed
nonstopDelta
2h 52mSEA-ONT
$166
6/4Tue
1 stopDelta
5h 06mONT-SEA
6/5Wed
1 stopDelta
6h 43mSEA-ONT
$176
6/13Thu
nonstopAlaska Airlines
2h 35mONT-SEA
7/17Wed
nonstopAlaska Airlines
2h 35mSEA-ONT
$187
10/9Wed
1 stopAmerican Airlines
7h 14mONT-SEA
10/19Sat
1 stopAmerican Airlines
7h 27mSEA-ONT
$221
5/22Wed
1 stopUnited Airlines
6h 07mONT-SEA
5/29Wed
1 stopUnited Airlines
6h 59mSEA-ONT
$234
8/17Sat
1 stopUnited Airlines
7h 28mONT-GEG
9/6Fri
1 stopUnited Airlines
18h 20mGEG-ONT
$430
5/20Mon
1 stopAmerican Airlines
6h 44mONT-GEG
5/27Mon
1 stopAmerican Airlines
4h 47mGEG-ONT
$566

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Recent one-way flight deals

5/21Tue
nonstopFrontier
2h 53mONT-SEA
$44
5/29Wed
nonstopFrontier
2h 53mONT-SEA
$46
6/19Wed
nonstopAlaska Airlines
2h 35mONT-SEA
$79
5/28Tue
nonstopDelta
3h 00mONT-SEA
$89
6/4Tue
nonstopAlaska Airlines
2h 45mONT-SEA
$100
7/11Thu
1 stopDelta
6h 59mONT-SEA
$108
5/29Wed
1 stopUnited Airlines
4h 40mONT-SEA
$119
5/15Wed
1 stopUnited Airlines
6h 07mONT-SEA
$140
7/4Thu
2 stopsAmerican Airlines
15h 16mONT-SEA
$332
5/14Tue
2 stopsAmerican Airlines
11h 20mONT-SEA
$502

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Last minute flights from Ontario to Washington

Last minute flight, train and bus deals

5/9Thu
multi-stopFrontier
20h 38mONT-SEA
5/22Wed
nonstopFrontier
2h 44mSEA-ONT
$212
5/10Fri
multi-stopFrontier
10h 51mONT-SEA
5/22Wed
nonstopFrontier
2h 44mSEA-ONT
$213
5/6Mon
nonstopAlaska Airlines
2h 38mONT-SEA
5/21Tue
nonstopAlaska Airlines
2h 32mSEA-ONT
$392
5/10Fri
multi-stopAmerican Airlines
7h 27mONT-SEA
5/13Mon
multi-stopAmerican Airlines
4h 45mSEA-ONT
$404
5/7Tue
nonstopAlaska Airlines
2h 45mONT-SEA
5/20Mon
nonstopAlaska Airlines
2h 33mSEA-ONT
$422
5/9Thu
multi-stopUnited Airlines
4h 41mONT-SEA
5/22Wed
multi-stopUnited Airlines
6h 28mSEA-ONT
$432
5/6Mon
multi-stopDelta
5h 19mONT-SEA
5/21Tue
nonstopDelta
2h 39mSEA-ONT
$436
5/10Fri
multi-stopAmerican Airlines
7h 27mONT-SEA
5/12Sun
multi-stopAmerican Airlines
4h 45mSEA-ONT
$438
5/9Thu
multi-stopUnited Airlines
4h 41mONT-SEA
5/23Thu
multi-stopUnited Airlines
6h 15mSEA-ONT
$455
5/6Mon
multi-stopDelta
7h 15mONT-SEA
5/21Tue
multi-stopDelta
4h 53mSEA-ONT
$496

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Ontario - Washington Flights

Departure:

Ontario (ONT)United States

Return flight deals:

Washington - Ontario

Cabin classes:

$397
$469
$311
$82