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Casper

$273+ Cheap flights from Ontario to Casper (ONT - CPR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPR
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Ontario to Casper

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Casper (CPR). 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 September 15, 2025.

Round-trip from

$308
(United Airlines)

Popular in

June

Cheapest in

April

Average price

$318
From Ontario to Casper Natrona County
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Casper

Cheapest flights from Ontario to Casper
Explore the most affordable flight options available from Ontario to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/14. 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 9/245:10 amONT - CPR
1 stop4h 40mUnited Airlines
Wed 10/13:12 pmCPR - ONT
1 stop6h 12mUnited Airlines
Deal found 9/14$273
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Sun 10/125:05 amONT - CPR
1 stop4h 42mUnited Airlines
Sun 10/191:32 pmCPR - ONT
1 stop7h 52mUnited Airlines
Deal found 9/14$384
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/291:33 pmONT - CPR
1 stop5h 44mUnited Airlines
Fri 10/311:25 pmCPR - ONT
1 stop8h 19mUnited Airlines
Deal found 9/15$536
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 9/251:15 pmONT - CPR
1 stop6h 02mUnited Airlines
Tue 9/307:00 amCPR - ONT
1 stop6h 51mUnited Airlines
Deal found 9/14$611
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/171:15 pmONT - CPR
1 stop7h 59mUnited Airlines
Fri 9/197:05 amCPR - ONT
1 stop6h 27mUnited Airlines
Deal found 9/15$888

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Casper 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 September 15, 2025.
Use the filters below to find and compare flights from Ontario to Casper that are best for you.

Fly from

Ontario

Fly to

Casper

Route

Depart

Return

Price

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Sat 3/7

1:00 pm-10:12 pm

1 stop8h 12m

Casper Natrona County

Tue 3/10

1:25 pm-8:17 pm

1 stop7h 52m

$308

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Sun 10/12

5:05 am-10:47 am

1 stop4h 42m

Casper Natrona County

Sun 10/19

1:32 pm-8:24 pm

1 stop7h 52m

$384

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Wed 10/29

1:33 pm-8:17 pm

1 stop5h 44m

Casper Natrona County

Fri 10/31

1:25 pm-8:44 pm

1 stop8h 19m

$536

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Thu 9/25

1:15 pm-8:17 pm

1 stop6h 02m

Casper Natrona County

Tue 9/30

7:00 am-12:51 pm

1 stop6h 51m

$611

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Sun 9/21

1:15 pm-8:21 pm

1 stop6h 06m

$444

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Best time to book a flight from Ontario to Casper

Have a flexible travel schedule? Discover the best time to fly to Casper 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 Casper

Get insights into the airlines that provide service to Casper. 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 Casper. Reviews last updated September 15, 2025.
Peruse reviews from past customers who have flown with United Airlines from Ontario to Casper 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
8,929 reviews

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

Comfort

7.3

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
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

Comfort

7.3

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 Casper. 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 Casper?

    There are many flights that can get you from Ontario to Casper in 8h 12m. Fly via United Airlines to get the fastest option. Ontario and Casper are separated by a distance of 856 mi.

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

    Currently priced at $297, United Airlines will fly you from Ontario to Casper and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip.

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

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

  • How can I find direct flights from Ontario to Casper?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Casper 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 Casper?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Casper (average of $348). Flying from Ontario to Casper in June is currently the most expensive (average of $500). 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 Casper?

Book flights to Casper if you plan to visit one of these locations
Rawlins

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Top airline flying from Ontario to Casper

Discover the top airline that operate flights from Ontario to Casper. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$297Average$428FlexibilityNo cancel feeOn-time69%

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