ONT - WYS

$344 Find Cheap Flights from Ontario to West Yellowstone - Compare and Save

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to West Yellowstone departing on 8/22. 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

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Everything you should know

Cheapest round-trip
$344
Delta
Sat 8/22Sat 8/29
ONT - WYS • 1 stop
Top airlines
Cheapest • from $344 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and West Yellowstone. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $426 (round-trip)
Shortest trip • 4h 37m (one-way)
Insights
Insights
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Insights
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We hope you love your trip to West Yellowstone!
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Flight Deals

Cheap Flights from Ontario to West Yellowstone (ONT-WYS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to West Yellowstone 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 West Yellowstone

Sat, Aug 22 - Sat, Aug 29
Delta Logo
6:00 am - 10:46 am-
3h 46m
Delta Logo
1:09 pm - 10:45 pm-
10h 36m
$344Delta
Sat, Aug 22 - Sat, Aug 29
Delta Logo
6:00 am - 10:46 am-
3h 46m
Delta Logo
1:09 pm - 10:45 pm-
10h 36m
$344Delta
Fri, Aug 21 - Fri, Aug 28
Delta Logo
6:00 am - 12:27 pm-
5h 27m
Delta Logo
1:09 pm - 10:45 pm-
10h 36m
$344Delta
Fri, Aug 21 - Fri, Aug 28
United Airlines Logo
5:00 am - 1:20 pm-
7h 20m
United Airlines Logo
4:44 pm - 8:53 pm-
5h 09m
$384United Airlines
Fri, Aug 21 - Fri, Aug 28
United Airlines Logo
5:00 am - 1:20 pm-
7h 20m
United Airlines Logo
4:44 pm - 8:53 pm-
5h 09m
$399United Airlines
Sun, Aug 30 - Sun, Sep 6
United Airlines Logo
5:00 am - 1:20 pm-
7h 20m
United Airlines Logo
4:44 pm - 8:53 pm-
5h 09m
$410United Airlines
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
5:00 am - 1:21 pm-
7h 21m
United Airlines Logo
1:55 pm - 8:53 pm-
7h 58m
$473United Airlines
Tue, Aug 18 - Sun, Aug 23
United Airlines Logo
5:00 am - 1:20 pm-
7h 20m
United Airlines Logo
1:55 pm - 8:53 pm-
7h 58m
$488United Airlines
Fri, Sep 18 - Tue, Sep 22
United Airlines Logo
5:00 am - 1:20 pm-
7h 20m
United Airlines Logo
1:55 pm - 8:53 pm-
7h 58m
$493United Airlines
Sat, Oct 3 - Fri, Oct 9
United Airlines Logo
5:00 am - 1:30 pm-
7h 30m
United Airlines Logo
2:05 pm - 8:58 pm-
7h 53m
$513United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to West Yellowstone flights

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

Which airlines provide the cheapest flights from Ontario to West Yellowstone?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Ontario to West Yellowstone were found on Delta ($344) and United Airlines ($384).

Good to know

Cheapest flight

$344
Flight from Ontario to West Yellowstone

When to book flights from Ontario to West Yellowstone

Are your dates flexible? Find out the best times to travel from Ontario to West Yellowstone based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to West Yellowstone

  • What is the cheapest flight from Ontario to West Yellowstone?

    In the last 5 days, the lowest price for a flight from Ontario to West Yellowstone was $344 for a round-trip ticket.

  • Do I need a passport to fly between Ontario and West Yellowstone?

    No

  • Which airports will I be using when flying from Ontario to West Yellowstone?

    Ontario and West Yellowstone are both served by 1 main airport. You will leave Ontario from Ontario and will be arriving at West Yellowstone.

  • Which aircraft models fly most regularly from Ontario to West Yellowstone?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to West Yellowstone?

    SkyTeam is the only airline alliance operating flights between Ontario and West Yellowstone.

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

    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 West Yellowstone.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to West Yellowstone 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 West Yellowstone?

    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 West Yellowstone with an airline and back to Ontario with another airline. Booking your flights between Ontario and WYS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to West Yellowstone?

    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 West Yellowstone from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to West Yellowstone

 
See real verified KAYAK customer reviews for airlines flying from Ontario to West Yellowstone. 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 West Yellowstone? 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.
7.8
DeltaOverall score based on 8482 reviews
7.2Food
8.1Boarding
8.5Crew
7.8Comfort
7.8Entertainment
Airline reviews

Internet connectivity still seems to be touchy on these flights, making it difficult to rely on it for getting work done.

8.0 ExcellentMatthew, Aug 2026
Read more Delta reviews

Internet connectivity still seems to be touchy on these flights, making it difficult to rely on it for getting work done.

Delta is always late. Ruined our first day of a short vacation. Timing is important. We pay to stay on an itinerary

Seats were not bad enough and uncomfortable good legroom in the emergency exit row we were in, but we were forbidden to hold my grandson on my lap for a little while, and the stewardess passed us saying it was against regulations which makes little or no sense when you’re 36,000 feet. The food snacks were really bad. Tasteless tasted like wallpaper, but we’re supposed to be protein bars, and the announcements were all completely incoherent because of the noise of the airplane and the lowness and crackly nature of the PA system.. this was disgraceful. No one in our party could understand a word of what the captain or the flight attendant were saying —not a word! The landing was a little hairy in a pretty stiff crosswind -we bounced before the plane stabilized on the runway

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full 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

One of the best crews and best flights I’ve ever had! Really great experience

There was no wifi even after my husband paid for wifi it wasn’t working. The plane looked and felt old.

Update the cabin with tv screens or at least music sources.

The bus ride from the terminal to board the plane is uncomfortable and stressful when making a connection.

Everything you need to know for your flight from Ontario to West Yellowstone

Information on your arrival and departure airports