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West Yellowstone

$259+ Cheap flights from Ontario to West Yellowstone (ONT - WYS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WYS
Jun 10 — Jun 171
Wed 6/10
Wed 6/17
1 adult, Economy
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Cheap flight deals from Ontario to West Yellowstone

Cheapest flights from Ontario to West Yellowstone
Explore the most affordable flight options available from Ontario to West Yellowstone. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 11, 2026.

This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/76:00 am
ONT
-
WYS
1 stop5h 28m
Delta
Sat 6/131:10 pm
WYS
-
ONT
1 stop4h 31m
Delta
Deal found 5/9$304
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:00 am
ONT
-
WYS
1 stop5h 25m
Delta
Wed 6/31:10 pm
WYS
-
ONT
1 stop4h 07m
Delta
Deal found 5/9$314
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:00 am
ONT
-
WYS
1 stop5h 28m
Delta
Sun 6/141:10 pm
WYS
-
ONT
1 stop4h 31m
Delta
Deal found 5/9$344
This United Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:00 am
ONT
-
WYS
1 stop7h 20m
United Airlines
Sat 10/102:02 pm
WYS
-
ONT
1 stop7h 50m
United Airlines
Deal found 5/7$345
This United Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:00 am
ONT
-
WYS
1 stop7h 32m
United Airlines
Wed 6/32:19 pm
WYS
-
ONT
1 stop7h 27m
United Airlines
Deal found 5/9$355
This United Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:00 am
ONT
-
WYS
1 stop7h 32m
United Airlines
Thu 6/42:19 pm
WYS
-
ONT
1 stop7h 27m
United Airlines
Deal found 5/9$394
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:00 am
ONT
-
WYS
1 stop3h 38m
Delta
Tue 6/21:10 pm
WYS
-
ONT
1 stop4h 07m
Delta
Deal found 5/9$434
This United Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/175:00 am
ONT
-
WYS
1 stop7h 32m
United Airlines
Thu 7/232:14 pm
WYS
-
ONT
1 stop7h 28m
United Airlines
Deal found 5/11$439
This Delta deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:00 am
ONT
-
WYS
1 stop5h 26m
Delta
Sun 7/261:10 pm
WYS
-
ONT
1 stop4h 20m
Delta
Deal found 5/11$444
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:00 am
ONT
-
WYS
1 stop5h 28m
Delta
Sat 6/131:10 pm
WYS
-
ONT
1 stop4h 31m
Delta
Deal found 5/9$448
This United Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:00 am
ONT
-
WYS
1 stop7h 32m
United Airlines
Thu 7/232:14 pm
WYS
-
ONT
1 stop7h 28m
United Airlines
Deal found 5/11$449

Find flight deals from Ontario to West Yellowstone

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to West Yellowstone (WYS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$304
(Delta)

One-way from

$259
(United Airlines)
Provider with most accurate pricing for Ontario-West Yellowstone flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-West Yellowstone flights.
Search Deals
From Ontario to West Yellowstone
Search Deals
One-way flight from Ontario to West Yellowstone
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to West Yellowstone that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 11, 2026.
Use the filters below to find and compare flights from Ontario to West Yellowstone that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Mon 6/8

6:00 am-12:28 pm

1 stop5h 28m

West Yellowstone

Sat 6/13

1:10 pm-4:41 pm

1 stop4h 31m

$344

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Wed 5/27

5:00 am-1:32 pm

1 stop7h 32m

West Yellowstone

Thu 6/4

2:19 pm-8:46 pm

1 stop7h 27m

$394

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Fri 6/5

5:00 am-1:32 pm

1 stop7h 32m

West Yellowstone

Mon 6/8

2:19 pm-12:12 pm

2 stops22h 53m

$530

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Wed 6/10

5:00 am-1:32 pm

1 stop7h 32m

West Yellowstone

Mon 6/15

2:19 pm-12:12 pm

2 stops22h 53m

$560

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Wed 5/27

6:00 am-12:25 pm

1 stop5h 25m

West Yellowstone

Thu 6/4

1:10 pm-10:32 pm

2 stops10h 22m

$564

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Sat 6/6

5:00 am-4:37 pm

1 stop10h 37m

West Yellowstone

Mon 6/8

2:19 pm-8:46 pm

1 stop7h 27m

$590

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Sat 6/6

6:39 pm-4:02 pm

2 stops20h 23m

West Yellowstone

Tue 6/9

2:19 pm-12:12 pm

2 stops22h 53m

$604

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Sat 6/6

5:00 am-4:37 pm

1 stop10h 37m

West Yellowstone

Wed 6/10

2:19 pm-8:46 pm

1 stop7h 27m

$619

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Thu 8/6

5:00 am-1:32 pm

1 stop7h 32m

West Yellowstone

Sat 8/15

5:45 pm-12:50 pm

1 stop20h 05m

$638

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Tue 5/26

5:00 am-1:32 pm

1 stop7h 32m

West Yellowstone

Sat 5/30

5:45 pm-5:28 pm

1 stop24h 43m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/6

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Ontario to West Yellowstone

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to West Yellowstone in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-West Yellowstone flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-West Yellowstone flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-West Yellowstone flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-West Yellowstone flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-West Yellowstone flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to West Yellowstone

Have a flexible travel schedule? Discover the best time to fly to West Yellowstone from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing West Yellowstone

Get insights into the airlines that provide service to West Yellowstone. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to West Yellowstone. Reviews last updated May 11, 2026.
Peruse reviews from past customers who have flown with United Airlines from Ontario to West Yellowstone to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,699 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.
United Airlines
7.4
Good
9,699 reviews
United Airlines
7.4
Good
9,699 reviews

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.

Related info for your journey

Find useful and relevant information for your journey from Ontario to West Yellowstone. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to West Yellowstone?

    There are many flights that can get you from Ontario to West Yellowstone in 5h 28m. Fly via Delta or United Airlines to get the fastest option. Airlines will cover a distance of 811 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Ontario to West Yellowstone round-trip?

    Our cheapest airline available from Ontario to West Yellowstone is United Airlines. Our recent data shows that you can find tickets from as low as $279 on this airline.

  • Can I find deals for flights from Ontario to West Yellowstone that include hotel bookings?

    Yes. In addition to deals on Ontario to West Yellowstone flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to West Yellowstone?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to West Yellowstone.

  • Can I find deals for business class flights from Ontario to West Yellowstone?

    Yes. Cheapflights offers flight deals from Ontario to West Yellowstone by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near West Yellowstone?

Book flights to West Yellowstone if you plan to visit one of these locations
Island Park

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Top airline flying from Ontario to West Yellowstone

Discover the top airline that operate flights from Ontario to West Yellowstone. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$279Average$363FlexibilityNo cancel feeOn-time69%

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