$75 Find Cheap Flights from Ontario to Washington

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 4/27. 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
1 adult, Economy, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Washington.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Washington.
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Flight Deals

Cheap Flights from Ontario to Washington

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Seattle
Seattle1 stop$125
Spokane
Spokane1 stop$151
Pasco
Pasco1 stop$193
Bellingham
Bellingham1 stop$313
Pullman
Pullman1 stop$303
Walla Walla
Walla Walla1 stop$313
Wenatchee
Wenatchee1 stop$368
Seattle
Seattle1 stop$125
Spokane
Spokane1 stop$151
Pasco
Pasco1 stop$193
Bellingham
Bellingham1 stop$313
Pullman
Pullman1 stop$303
Walla Walla
Walla Walla1 stop$313
Wenatchee
Wenatchee1 stop$368

Book Cheap Ontario to Washington Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Washington that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Washington

Wed, May 13 - Sat, May 23
Frontier Logo
4:39 pm - 10:22 am
ONT
-
SEA
17h 43m
1 stop
Frontier Logo
11:51 am - 2:35 pm
SEA
-
ONT
2h 44mnonstop
$125Frontier
Fri, May 29 - Mon, Jun 1
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
Frontier Logo
11:51 am - 2:35 pm
SEA
-
ONT
2h 44mnonstop
$127Frontier
Thu, May 28 - Fri, Jun 5
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
Frontier Logo
11:51 am - 2:35 pm
SEA
-
ONT
2h 44mnonstop
$128Frontier
Sat, May 23 - Sat, May 30
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
Frontier Logo
7:50 pm - 10:05 am
SEA
-
ONT
14h 15m
1 stop
$134Frontier
Tue, Apr 28 - Sat, May 2
Alaska Airlines Logo
7:00 am - 9:24 am
ONT
-
PDX
2h 24mnonstop
Alaska Airlines Logo
9:30 pm - 11:48 pm
PDX
-
ONT
2h 18mnonstop
$177Alaska Airlines
Thu, Jun 4 - Mon, Jun 8
Multiple Airlines Logo
3:30 pm - 7:58 pm
ONT
-
PSC
28h 28m
1 stop
Multiple Airlines Logo
8:48 pm - 7:48 pm
PSC
-
ONT
23h 00m
1 stop
$193Multiple Airlines
Thu, May 7 - Sun, May 10
Multiple Airlines Logo
4:04 pm - 8:24 pm
ONT
-
PSC
28h 20m
1 stop
Multiple Airlines Logo
3:30 pm - 7:49 am
PSC
-
ONT
16h 19m
2 stops
$228Multiple Airlines
Thu, May 21 - Mon, May 25
United Airlines Logo
6:00 am - 11:27 am
ONT
-
PSC
5h 27m
1 stop
United Airlines Logo
7:00 am - 12:12 pm
PSC
-
ONT
5h 12m
1 stop
$299United Airlines
Sat, May 2 - Wed, May 6
Alaska Airlines Logo
2:59 pm - 4:54 pm
ONT
-
PUW
25h 55m
1 stop
Alaska Airlines Logo
5:31 pm - 2:19 pm
PUW
-
ONT
20h 48m
1 stop
$303Alaska Airlines
Fri, Aug 21 - Sun, Aug 23
Delta Logo
7:00 am - 11:57 am
ONT
-
PSC
4h 57m
1 stop
Delta Logo
9:30 am - 4:14 pm
PSC
-
ONT
6h 44m
1 stop
$319Delta
Booking Insights

KAYAK's insights & trends for Ontario to Washington flights

Get data-powered insights and trends into flights from Ontario to Washington to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Ontario to State of Washington?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to State of Washington departing in May.

What is the cheapest Ontario to Washington flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Washington from Ontario found in the last 72 hours was to Seattle, at $138 round-trip. The most popular route is from Ontario (ONT) to Seattle (SEA), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $138.

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

The average price for all round-trip flights from Ontario to Washington depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Washington is generally in the morning, when round-trip flights cost $268 on average. Morning departures are around 1% cheaper than evening flights, on average. The most expensive time of day to fly to Washington is generally at night, which is peak travel time and where the average cost of a ticket is $291.

Can I save money by flying with a layover from Ontario to Washington?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $316, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Washington, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Washington is January, when tickets cost $197 (return) on average. On the other hand, the most expensive months are February and April, when the average cost of round-trip tickets is $288 and $257 respectively.

What’s the cheapest day of the week to fly from Ontario to Washington?

The average price of all round-trip flights from Ontario to Washington clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Washington on a Saturday and more expensive on a Wednesday. On your return trip to Ontario, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Washington, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Washington, you should book around 3 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$75
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from Ontario to Portland

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 from Ontario to Washington 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 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.

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: Portland $178 one-way - $277 round-trip; Seattle $178 one-way - $265 round-trip

Reviews of the top 5 airlines serving from Ontario to Washington

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Washington. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
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
SouthwestOverall score based on 4337 reviews
8.1Boarding
7.5Entertainment
8.6Crew
8.0Comfort
7.0Food
Airline reviews

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

2.0 MediocreJames, Apr 2026
LAX - MCO
Read more Southwest reviews

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

The charges were ridiculous for an hour flight and the turbulence was very scary.

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

Alaska is consistently the best in all categories. Excellent airlines and employees

My daughter has anxiety and became nauseous after boarding the plane and before take off. She went to the plane bathroom and ended up having to vomit, and your staff promptly removed us from the flight. We explained that it was due to my daughter’s anxiety, and that the condition would not continue in the air, but they removed us anyway. We have flown many many times before on many different airlines and my daughter’s anxiety has resulted in nausea and sickness before takeoff, and every airline has been accommodating and professional. This is was our first time flying with your airline, and also the first time we have ever been removed from a flight. This was the worst service we have ever experienced. This was a special surprise trip we gifted to my daughter for graduating college. I had also paid to upgrade the family to first class and sit all together which we had never done before and can’t afford on a normal basis. Our removal from the flight was not only extremely embarrassing, but devastating for my daughter. My daughter and I were removed from the plane and a call was made by your staff to medical personnel, a few questions were asked of my daughter, and then she was magically cleared. All of this took mere minutes. Why this could not have been performed while we were on the plane, or why this could not have been performed off the plane and then us allowed to reboard is beyond me. My wife and youngest daughter continued on the original flight alone and were very upset and crying due to the situation, yet the staff did nothing to console or assist them. My wife states that upon arrival in Portland and as they were exiting the plane, one of the stewardesses involved said “byyyyeeeee” to them sarcastically and laughed. Myself and my oldest daughter had to wait 4 hours for an alternate flight and were sat in regular seats because our first class seat purchase could not be honored. My wife wasn’t allowed to pick up our rental car and had to wait 4 hours with our luggage until I arrived. The delay prevented us from being able to carry out planned events and ruined the first day of our trip. Upon explaining all of this to your customer service, we received no sympathy, assistance, or compensation other than your staff submitting a request for a reimbursement of my and my daughters first class upgrade cost. When checking in early for our flight back home, the luggage cost for myself and my eldest daughter was no longer discounted as it was for my wife and youngest daughter. Customer service once again could not assist me over the phone and rectify what should have been a minor adjustment. Instead they stated I would have to wait until we physically checked bags in at the airport and then ask staff to adjust the luggage cost. With everything else we had experienced, I was not going to leave that to chance and instead paid full price for the luggage ahead of time. Or experience with Alaska Airlines was a complete disaster and I am baffled at the lack of empathy and assistance from your staff. I’m not sure of what else to say other than the fact that unless we are compensated by Alaska Airlines in some form to offset the horrendous service we received, we will be relaying our experience to family and friends and on social media, and doing all we can to urge everyone to avoid utilizing your services.

I got an email 3 hours before the flight letting me know it got canceled

Boarding was easy and quick. Staff was very friendly. Service of snacks and drinks by staff was outstanding.

No complimentary snacks or food. Had to buy drinks and food.

On time, friendly and professional staff and crew Very nice new terminal in Spokane

Everything was excellent. It always is with Alaska Airlines. Thank you. 😊

It was ok! Not fond of sitting in middle seat. Tried to upgrade with my Atmos card but it was a new account and they weren’t able to look up my account details.

Wi-Fi cut out for a bit, then resumed. Otherwise flawless flight.

Ended up sitting in front of a child who kicked the back of the seat and screamed for most of the flight.

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

Fabulous if you have a portable wheelchair. They can store it in the galley and you can just walk out with it. Really nice and the flat seats are just incredible, very nice. iPads for movies, also pretty nice,

No charging outlets worked. Other than collecting trash attendants didn’t come around. No one could hear flight attendants announcements during the flight. Seat pads were horrible. Sitting on a board for 5 hours. What happened to Hawaiian airlines comfort, hospitality, and extras? Our pilots did an excellent job trying to minimize turbulence and incredible job in landing in windy conditions.

I like that if they asked you to checked in a bag at the gate they give you priority to board

Yall need to integrate your system with Alaska more efficiently. They booted me off the first flight because of a discrepancy on your end.

Unfortunately, I was put into the middle seat in the first row of premium seating. Sounds nice right? No! that is the worst seat in the plane. I wish I was in economy rather than be in that seat! There is no seat back pocket, no tray table, no charger. Nothing! so unless you're row mates are willing to let you share their basic amenities any flyer should have, you are stuck. It was the worst experience ever! And the flight attendant forgot to take my drink order. I felt like the forgotten flyer.

Delayed and cancelled flights were hard and very stressful, both ways!

The flight was CANCELED!!! Can’t get much more “poor” than that. I had to switch to American Airlines, add another layover and got home in Honolulu 4 hours later than I was supposed to be home. One bright spot was Josh with Alaska Airlines at SFO. He got me on a United Flight that got me home a few hours before I would have. Without him I would have gotten home almost 7 hours after my originally scheduled flight.

Canceled my flight within 24 hours, causing me arriving home midnight. Will never book Hawaiian airlines anymore

I received several emails about my 3:10 flight. When I showed up to the airport at 12:30 to check my bags I was told the flight was actually at 1 pm. They grudgingly rebooked me for a flight at 5:22 to Vegas to get a connecting to LAX. I did find the gate for my original 3:10 flight but they were booked. I proceeded to receive status updates and gate change information for the 3:10 flight, even though I was apparently never supposed to be on that flight

The food options were limited and very specific. Some type of entertainment option for a 4.5 hour flight would have been nice.

Remind customers of the need to have passport or new ID for boarding.

The flight never took off and we spent 7 hours at the airport

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

Horrible. I would never fly Frontier again. The booking process is tricky at best, but fraudulent in my opinion. Frontier customer service did nothing to rectify my purchase -- I ended up paying more than double what I could have gotten from other airlines and nearly triple what I thought I was buying from Frontier. Their booking practices are unfair to the consumer.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

I’m not gonna fly Frontier Airlines because booking is not an option. No water or food is for high price, not equipped for health emergency incompetent crew for emergency services. Cheap airline shows it is cheaper in all service categories. Boarding is the best of all airlines!

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I never got to experience the flight because they delayed my first flight and I missed this one. Then Frontier didn't want to help me rebook a flight to get me to my final destination.

Everything you need to know for your flight from Ontario to Washington

Information on your arrival and departure airports