ONT - WYS

$314 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 8/2. 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 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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Everything you should know

Cheapest round-trip
$314
Delta
Sun 8/2Sat 8/8
ONT - WYS • 1 stop
Top airlines
Cheapest • from $314 (round-trip)
Best reviews • 7.4 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 $382 (round-trip)
Shortest trip • 4h 31m (one-way)
Insights
Insights
Insights
Insights
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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!
Flight Deals
Booking Insights
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

Sun, Aug 2 - Sat, Aug 8
Delta Logo
6:00 am - 12:26 pm
ONT
-
WYS
5h 26m
1 stop
Delta Logo
11:29 am - 4:24 pm
WYS
-
ONT
5h 55m
1 stop
$314Delta
Sat, Jun 6 - Wed, Jun 10
Delta Logo
6:00 am - 10:38 am
ONT
-
WYS
3h 38m
1 stop
Delta Logo
1:10 pm - 4:41 pm
WYS
-
ONT
4h 31m
1 stop
$319Delta
Sun, Aug 2 - Thu, Aug 13
Delta Logo
6:00 am - 12:26 pm
ONT
-
WYS
5h 26m
1 stop
Delta Logo
1:09 pm - 10:45 pm
WYS
-
ONT
10h 36m
2 stops
$324Delta
Sat, Jun 6 - Wed, Jun 10
Delta Logo
6:00 am - 10:38 am
ONT
-
WYS
3h 38m
1 stop
Delta Logo
1:10 pm - 10:41 pm
WYS
-
ONT
10h 31m
2 stops
$329Delta
Sat, Aug 1 - Sat, Aug 8
Delta Logo
6:00 am - 10:45 am
ONT
-
WYS
3h 45m
1 stop
Delta Logo
11:29 am - 4:24 pm
WYS
-
ONT
5h 55m
1 stop
$429Delta
Sun, Aug 2 - Mon, Aug 10
Delta Logo
6:00 am - 12:26 pm
ONT
-
WYS
5h 26m
1 stop
Delta Logo
1:09 pm - 10:45 pm
WYS
-
ONT
10h 36m
2 stops
$439Delta
Sat, Aug 1 - Fri, Aug 14
United Airlines Logo
5:00 am - 1:32 pm
ONT
-
WYS
7h 32m
1 stop
United Airlines Logo
5:45 pm - 12:12 pm
WYS
-
ONT
19h 27m
2 stops
$451United Airlines
Mon, Aug 3 - Sat, Aug 8
Delta Logo
6:01 pm - 12:27 pm
ONT
-
WYS
17h 26m
2 stops
Delta Logo
11:29 am - 4:24 pm
WYS
-
ONT
5h 55m
1 stop
$462Delta
Mon, Aug 3 - Fri, Aug 14
United Airlines Logo
5:00 am - 1:32 pm
ONT
-
WYS
7h 32m
1 stop
United Airlines Logo
5:45 pm - 12:12 pm
WYS
-
ONT
19h 27m
2 stops
$466United Airlines
Mon, Aug 3 - Thu, Aug 13
Delta Logo
6:01 pm - 12:27 pm
ONT
-
WYS
17h 26m
2 stops
Delta Logo
1:09 pm - 10:45 pm
WYS
-
ONT
10h 36m
2 stops
$467Delta
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 3 days.

In the past 3 days, the cheapest round-trip tickets from Ontario to West Yellowstone were found on Delta ($314) and United Airlines ($451).

Good to know

Cheapest flight$314
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 $314 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 9748 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
6.6Food
8.1Crew
Airline reviews

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

2.0 MediocreCatie, May 2026
SFO - BOS
Read more United Airlines reviews

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

No screens or meal options. Freezing cold. Dirty seats. Left late.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

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

Information on your arrival and departure airports