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West Yellowstone

$301+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — WYS
Apr 27 — May 41
Mon 4/27
Mon 5/4
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 March 28, 2026.

This Delta deal was found by Cheapflights users on 3/27. 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.
Sat 9/126:00 am
ONT
-
WYS
1 stop3h 41m
Delta
Sun 9/201:09 pm
WYS
-
ONT
1 stop4h 05m
Delta
Deal found 3/27$314
This Delta deal was found by Cheapflights users on 3/27. 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.
Sat 9/126:00 am
ONT
-
WYS
1 stop3h 41m
Delta
Sat 9/1911:29 am
WYS
-
ONT
2 stops12h 11m
Delta
Deal found 3/27$359
This Delta deal was found by Cheapflights users on 3/27. 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 9/166:00 am
ONT
-
WYS
1 stop5h 21m
Delta
Sat 9/1911:29 am
WYS
-
ONT
1 stop5h 45m
Delta
Deal found 3/27$429
This United Airlines deal was found by Cheapflights users on 3/27. 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 8/155:00 am
ONT
-
WYS
1 stop7h 20m
United Airlines
Tue 8/182:02 pm
WYS
-
ONT
1 stop7h 50m
United Airlines
Deal found 3/27$443
This United Airlines deal was found by Cheapflights users on 3/27. 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.
Tue 9/85:00 am
ONT
-
WYS
1 stop7h 20m
United Airlines
Thu 9/172:02 pm
WYS
-
ONT
1 stop7h 50m
United Airlines
Deal found 3/27$453
This Delta deal was found by Cheapflights users on 3/27. 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.
Fri 9/46:00 am
ONT
-
WYS
1 stop5h 21m
Delta
Sun 9/61:09 pm
WYS
-
ONT
1 stop4h 05m
Delta
Deal found 3/27$464
This Delta deal was found by Cheapflights users on 3/27. 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.
Sat 9/126:00 am
ONT
-
WYS
1 stop3h 41m
Delta
Fri 9/181:09 pm
WYS
-
ONT
2 stops23h 05m
Delta
Deal found 3/27$467
This Delta deal was found by Cheapflights users on 3/27. 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 7/226:00 am
ONT
-
WYS
1 stop5h 27m
Delta
Sat 7/2511:29 am
WYS
-
ONT
1 stop6h 06m
Delta
Deal found 3/27$474
This United Airlines deal was found by Cheapflights users on 3/27. 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 9/25:00 am
ONT
-
WYS
1 stop7h 20m
United Airlines
Wed 9/92:02 pm
WYS
-
ONT
1 stop7h 50m
United Airlines
Deal found 3/27$478
This United Airlines deal was found by Cheapflights users on 3/27. 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 9/95:00 am
ONT
-
WYS
1 stop7h 20m
United Airlines
Thu 9/172:02 pm
WYS
-
ONT
1 stop7h 50m
United Airlines
Deal found 3/27$488
This United Airlines deal was found by Cheapflights users on 3/23. 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 5/65:00 am
ONT
-
WYS
1 stop7h 28m
United Airlines
Sat 5/95:45 pm
WYS
-
ONT
1 stop19h 53m
United Airlines
Deal found 3/23$491
This United Airlines deal was found by Cheapflights users on 3/27. 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.
Tue 9/85:00 am
ONT
-
WYS
1 stop7h 20m
United Airlines
Wed 9/162:02 pm
WYS
-
ONT
1 stop7h 50m
United Airlines
Deal found 3/27$493

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 March 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$314
(Delta)

One-way from

$301
(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 March 28, 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

Sat 9/5

6:00 am-12:21 pm

1 stop5h 21m

West Yellowstone

Thu 9/10

1:09 pm-4:14 pm

1 stop4h 05m

$429

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Sat 9/12

5:00 am-1:20 pm

1 stop7h 20m

West Yellowstone

Mon 9/21

2:02 pm-8:52 pm

1 stop7h 50m

$464

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Wed 5/6

5:00 am-1:28 pm

1 stop7h 28m

West Yellowstone

Sat 5/9

5:45 pm-12:38 pm

1 stop19h 53m

$491

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Wed 7/22

6:00 am-12:27 pm

1 stop5h 27m

West Yellowstone

Sun 7/26

1:09 pm-4:35 pm

1 stop4h 26m

$524

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Thu 6/18

5:00 am-1:32 pm

1 stop7h 32m

West Yellowstone

Sun 6/21

2:19 pm-8:42 pm

1 stop7h 23m

$528

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Thu 9/10

6:00 am-12:21 pm

1 stop5h 21m

West Yellowstone

Wed 9/16

1:09 pm-4:14 pm

1 stop4h 05m

$539

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Thu 9/3

6:00 am-12:21 pm

1 stop5h 21m

West Yellowstone

Tue 9/8

1:09 pm-4:14 pm

1 stop4h 05m

$539

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Mon 9/14

5:00 am-1:20 pm

1 stop7h 20m

West Yellowstone

Sat 9/19

2:02 pm-8:52 pm

1 stop7h 50m

$540

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Tue 9/8

5:00 am-1:20 pm

1 stop7h 20m

West Yellowstone

Sat 9/19

2:02 pm-8:52 pm

1 stop7h 50m

$540

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Fri 9/18

6:00 am-12:21 pm

1 stop5h 21m

West Yellowstone

Mon 9/21

1:09 pm-10:40 pm

2 stops10h 31m

$549

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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 March.
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.

Cheapflights Insights

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

What is the cheapest month to book a flight from Ontario to West Yellowstone?

Currently, November is the cheapest month in which you can book a flight from Ontario to West Yellowstone (average of $60). Flying from Ontario to West Yellowstone in October is currently the most expensive (average of $170). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 March 28, 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
9,499 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

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
9,499 reviews
United Airlines
7.4
Good
9,499 reviews

Overall

7.4

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

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 21m. 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 $230 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.

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

    Currently, November is the cheapest month in which you can book a flight from Ontario to West Yellowstone (average of $60). Flying from Ontario to West Yellowstone in October is currently the most expensive (average of $170). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 March 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$230Average$323FlexibilityNo cancel feeOn-time69%

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