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$308+ Cheap flights from Casper to Ontario (CPR - ONT)

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ONT
Dec 19 — Dec 261
Fri 12/19
Fri 12/26
1 adult, Economy
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Find flight deals from Casper to Ontario

Cheapest flights from Casper to Ontario
Explore the most affordable flight options available from Casper to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 19, 2025.

This United Airlines deal was found by Cheapflights users on 11/18. 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 12/95:30 amCPR - ONT
1 stop8h 02mUnited Airlines
Sat 12/135:05 amONT - CPR
1 stop8h 33mUnited Airlines
Deal found 11/18$308
This United Airlines deal was found by Cheapflights users on 11/18. 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 11/259:03 amCPR - ONT
1 stop4h 30mUnited Airlines
Tue 12/25:05 amONT - CPR
1 stop8h 33mUnited Airlines
Deal found 11/18$368
This United Airlines deal was found by Cheapflights users on 11/19. 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 12/177:00 amCPR - ONT
1 stop6h 32mUnited Airlines
Wed 12/241:40 pmONT - CPR
1 stop7h 45mUnited Airlines
Deal found 11/19$1,173

Cheap flight deals from Casper to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Casper (CPR) to Ontario (ONT). 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 November 19, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$308
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$448
Provider with most accurate pricing for Casper Natrona County-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Casper Natrona County-Ontario flights.
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From Casper Natrona County to Ontario
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Casper to Ontario 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 November 19, 2025.
Use the filters below to find and compare flights from Casper to Ontario that are best for you.

Fly from

Casper

Fly to

Ontario

Route

Depart

Return

Price

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Tue 12/9

5:30 am-12:32 pm

1 stop8h 02m

Ontario

Sat 12/13

5:05 am-2:38 pm

1 stop8h 33m

$308

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Wed 12/17

5:30 am-12:17 pm

2 stops7h 47m

Ontario

Wed 12/24

1:40 pm-10:25 pm

1 stop7h 45m

$314

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Sun 1/4

1:22 pm-9:07 pm

1 stop8h 45m

Ontario

Sun 1/11

1:24 pm-8:40 pm

1 stop6h 16m

$422

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Compare providers for flights from Casper to Ontario

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 Casper to Ontario in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 Casper-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Casper-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Casper-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Casper-Ontario flights, Cheapflights users trust eDreams the most. eDreams 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 Casper-Ontario 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 Casper to Ontario

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

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated November 19, 2025.
Read reviews from past customers who have flown United Airlines from Casper to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,025 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,025 reviews
United Airlines
7.4
Good
9,025 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

Find useful and relevant information for your journey from Casper to Ontario. 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 Casper to Ontario?

    Airlines like United Airlines fly from Casper to Ontario in about 8h 02m. The time it takes to get you to your destination can typically vary by up to . The distance from Casper to Ontario is about 856 mi.

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

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

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

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

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

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

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Top airline flying from Casper to Ontario

Discover the top airline that operate flights from Casper to Ontario. 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 November 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$199Average$403FlexibilityNo cancel feeOn-time69%

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