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$328+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ONT
févr. 20 — févr. 271
ven. 2/20
ven. 2/27
1 adult, Economy
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Cheap 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 janvier 21, 2026.

This United Airlines deal was found by Cheapflights users on 1/19. 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.
mar. 10/271:25 pm
CPR
-
ONT
1 stop7h 55m
United Airlines
sam. 10/311:00 pm
ONT
-
CPR
1 stop4h 37m
United Airlines
Deal found 1/19$328
This United Airlines deal was found by Cheapflights users on 1/20. 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.
jeu. 1/299:00 am
CPR
-
ONT
1 stop4h 47m
United Airlines
sam. 1/311:24 pm
ONT
-
CPR
1 stop7h 50m
United Airlines
Deal found 1/20$398
This United Airlines deal was found by Cheapflights users on 1/20. 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.
ven. 1/3011:28 am
CPR
-
ONT
2 stops12h 25m
United Airlines
lun. 2/25:05 am
ONT
-
CPR
1 stop4h 48m
United Airlines
Deal found 1/20$404
This United Airlines deal was found by Cheapflights users on 1/19. 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.
lun. 2/161:20 pm
CPR
-
ONT
1 stop8h 30m
United Airlines
lun. 2/231:50 pm
ONT
-
CPR
2 stops7h 19m
United Airlines
Deal found 1/19$414
This United Airlines deal was found by Cheapflights users on 1/19. 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.
ven. 2/136:08 pm
CPR
-
ONT
1 stop27h 42m
United Airlines
lun. 2/165:00 am
ONT
-
CPR
1 stop4h 51m
United Airlines
Deal found 1/19$440

Find 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 janvier 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$328
(United Airlines)

Popular in

December

Cheapest in

February
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.
Search Deals
From Casper Natrona County to Ontario
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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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 janvier 21, 2026.
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

lun. 2/16

1:20 pm-8:50 pm

1 stop8h 30m

Ontario

lun. 2/23

5:00 am-2:40 pm

1 stop8h 40m

$328

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

sam. 1/31

9:00 am-12:47 pm

1 stop4h 47m

Ontario

lun. 2/2

5:05 am-10:53 am

1 stop4h 48m

$398

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

ven. 2/13

6:08 pm-8:50 pm

1 stop27h 42m

Ontario

lun. 2/16

5:00 am-10:51 am

1 stop4h 51m

$440

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

  • Most accurate provider: When it comes to deals on Casper-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Casper-Ontario flight deals on Cheapflights vs. FlightHub >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 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 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.

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 30m. 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.

See more FAQs

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