ONT - WYS

$421 Find Cheap Flights from Ontario to West Yellowstone

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 West Yellowstone departing on 5/26. 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
$421
United Airlines
Thu 7/9Mon 7/13
ONT - WYS • 1 stop
Cheapest one-way
$261
United Airlines
Tue 5/26
ONT - WYS • 1 stop
Top airlines
Delta
Cheapest • from $254 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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

Thu, Jul 9 - Mon, Jul 13
United Airlines Logo
5:00 am - 1:20 pm
ONT
-
WYS
7h 20m
1 stop
United Airlines Logo
2:02 pm - 8:17 pm
WYS
-
ONT
7h 15m
1 stop
$421United Airlines
Wed, Jun 3 - Wed, Jun 10
United Airlines Logo
5:00 am - 1:20 pm
ONT
-
WYS
7h 20m
1 stop
United Airlines Logo
2:02 pm - 8:17 pm
WYS
-
ONT
7h 15m
1 stop
$428United Airlines
Sat, Jun 6 - Sat, Jun 13
United Airlines Logo
5:00 am - 1:20 pm
ONT
-
WYS
7h 20m
1 stop
United Airlines Logo
2:02 pm - 8:17 pm
WYS
-
ONT
7h 15m
1 stop
$468United Airlines
Wed, Jun 3 - Wed, Jun 10
Delta Logo
6:00 am - 12:21 pm
ONT
-
WYS
5h 21m
1 stop
Delta Logo
1:09 pm - 4:14 pm
WYS
-
ONT
4h 05m
1 stop
$497Delta
Thu, Jun 25 - Sun, Jun 28
Delta Logo
6:00 am - 12:21 pm
ONT
-
WYS
5h 21m
1 stop
Delta Logo
1:09 pm - 4:14 pm
WYS
-
ONT
4h 05m
1 stop
$589Delta
Thu, Jun 25 - Mon, Jun 29
United Airlines Logo
5:00 am - 1:20 pm
ONT
-
WYS
7h 20m
1 stop
United Airlines Logo
2:02 pm - 8:17 pm
WYS
-
ONT
7h 15m
1 stop
$592United Airlines
Wed, Jun 3 - Wed, Jun 10
Delta Logo
6:00 am - 12:21 pm
ONT
-
WYS
5h 21m
1 stop
Delta Logo
1:09 pm - 10:40 pm
WYS
-
ONT
10h 31m
2 stops
$680Delta
Thu, Jun 25 - Sun, Jun 28
United Airlines Logo
5:00 am - 1:20 pm
ONT
-
WYS
7h 20m
1 stop
United Airlines Logo
5:45 pm - 12:20 pm
WYS
-
ONT
19h 35m
2 stops
$690United Airlines
Thu, Jul 9 - Mon, Jul 13
United Airlines Logo
1:33 pm - 4:07 pm
ONT
-
WYS
25h 34m
2 stops
United Airlines Logo
2:02 pm - 8:17 pm
WYS
-
ONT
7h 15m
1 stop
$700United Airlines
Thu, Jul 9 - Mon, Jul 13
United Airlines Logo
6:02 am - 4:07 pm
ONT
-
WYS
33h 05m
3 stops
United Airlines Logo
2:02 pm - 8:17 pm
WYS
-
ONT
7h 15m
1 stop
$763United 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 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to West Yellowstone were found on Delta ($254) and United Airlines ($421).

Good to know

Cheapest flight$261
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 $254 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 9195 reviews
6.6Food
7.7Boarding
7.1Entertainment
8.1Crew
7.3Comfort
Airline reviews

The flight crew where really good. Better then the crew from BNE to SFO

10.0 ExcellentVanessa, Jan 2026
SFO - IAD
Read more United Airlines reviews

The flight crew where really good. Better then the crew from BNE to SFO

left on time, reasonable boarding process arrived early luggage came out quickly

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Premium Plus is a really good idea for longer flights

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

Information on your arrival and departure airports