ONT - WYS

$329 Find Cheap Flights from Ontario to West Yellowstone

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 10/8. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to West Yellowstone, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to West Yellowstone, as well as popular online travel agencies
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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

Wed, Oct 8 - Thu, Oct 9
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 8:24 pmWYS-ONT
7h 29m1 stop
$329United Airlines
Find Deal
Sat, Sep 27 - Tue, Sep 30
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 8:24 pmWYS-ONT
7h 29m1 stop
$449United Airlines
Find Deal
Fri, Oct 3 - Mon, Oct 6
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 3:02 pmWYS-ONT
26h 07m1 stop
$457United Airlines
Find Deal
Tue, Sep 30 - Fri, Oct 3
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 12:51 pmWYS-ONT
23h 56m1 stop
$510United Airlines
Find Deal
Tue, Sep 30 - Fri, Oct 3
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 12:13 pmWYS-ONT
23h 18m2 stops
$537United Airlines
Find Deal
Wed, Oct 8 - Thu, Oct 9
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 12:13 pmWYS-ONT
23h 18m2 stops
$621United Airlines
Find Deal
Sat, Sep 27 - Tue, Sep 30
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 10:52 pmWYS-ONT
9h 57m2 stops
$638United Airlines
Find Deal
Wed, Oct 1 - Sat, Oct 4
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 8:24 pmWYS-ONT
7h 29m1 stop
$646United Airlines
Find Deal
Fri, Sep 26 - Mon, Sep 29
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 12:51 pmWYS-ONT
23h 56m1 stop
$658United Airlines
Find Deal
Sat, Sep 27 - Sun, Sep 28
United Airlines Logo
5:05 am - 1:20 pmONT-WYS
7h 15m1 stop
United Airlines Logo
1:55 pm - 8:24 pmWYS-ONT
7h 29m1 stop
$698United Airlines
Find Deal

Everything you should know

Cheapest round-trip
$329
United Airlines
Wed 10/8Thu 10/9
ONT - WYS • 1 stop
Cheapest one-way
Multiple Airlines
Mon 9/15
ONT - WYS • multi-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to West Yellowstone!
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.

What is the most popular layover airport when flying from Ontario to West Yellowstone?

Percentage of 1-stop round-trip flights from Ontario to West Yellowstone chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Denver (DEN) is the top choice – 72% of KAYAK users who clicked on 1-stop flights from Ontario to West Yellowstone picked an itinerary connecting there.

What is the cheapest layover airport when flying from Ontario to West Yellowstone?

Average round-trip price for 1-stop flights from Ontario to West Yellowstone clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Denver (DEN) offer the most affordable fares, with an average round-trip price of $370.

Which layover airport offers the shortest total travel time from Ontario to West Yellowstone?

Shortest average total travel time for 1-stop one-way flights from Ontario to West Yellowstone via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via Salt Lake City (SLC) for the shortest journey. The average one-way travel time for flights connecting there is 4h 23m.

Which layover airport has the quickest connection when flying from Ontario to West Yellowstone?

Average layover duration at different layover airports for 1-stop one-way flights from Ontario to West Yellowstone, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Salt Lake City (SLC) often has the shortest layovers from Ontario to West Yellowstone, with an average of 1h 48m.

Good to know

Cheapest flight$329
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 3 days, the lowest price for a flight from Ontario to West Yellowstone was $329 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?

    Star Alliance 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.
7.4
United AirlinesOverall score based on 8929 reviews
7.3Comfort
7.1Entertainment
6.6Food
8.1Crew
7.7Boarding
Airline reviews

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

6.0 GoodMarydoug, Aug 2025SJC - DEN
Read more United Airlines reviews

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Boarded plane and then delayed 1.5 hours while on the plane

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

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

Information on your arrival and departure airports

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