$243+ Cheap flights from Casper to Ontario (CPR - ONT)
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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ONT
Feb 28 — Mar 71
1 adult, Economy
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1. Tell us where you want to go
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Casper to Ontario
Cheapest flights from Casper to OntarioExplore 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 January 29, 2026.
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 January 29, 2026.
This United Airlines deal was found by Cheapflights users on 1/28. 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 10/271:25 pm
CPR
- ONT
1 stop7h 55m
United Airlines
Sat 10/311:00 pm
ONT
- CPR
1 stop4h 37m
United Airlines
Deal found 1/28![United Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/183:15 pm
CPR
- ONT
1 stop6h 35m
United Airlines
Tue 3/311:34 pm
ONT
- CPR
1 stop7h 33m
United Airlines
Deal found 1/28![United Airlines logo]()
$336
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/75:25 am
CPR
- ONT
1 stop8h 23m
United Airlines
Sat 3/76:37 pm
ONT
- CPR
2 stops22h 20m
United Airlines
Deal found 1/27![United Airlines logo]()
$410
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 January 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $328 (United Airlines) |
One-way from | $243 (United Airlines) |
Popular in | December |
Cheapest in | February |
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 January 29, 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
Tue 2/17
9:00 am-12:43 pm
1 stop4h 43m
Ontario
Sat 2/21
1:45 pm-8:26 pm
1 stop5h 41m
$328
CasperOntario
CPR - ONT
CPRONT
Casper Natrona County
Wed 3/18
3:15 pm-8:50 pm
1 stop6h 35m
Ontario
Tue 3/31
1:34 pm-10:07 pm
1 stop7h 33m
$336
CasperOntario
CPR - ONT
CPRONT
Casper Natrona County
Sat 3/7
5:25 am-12:48 pm
1 stop8h 23m
Ontario
Sat 3/7
6:37 pm-5:57 pm
2 stops22h 20m
$410
CasperOntario
CPR - ONT
CPRONT
Casper Natrona County
Fri 3/6
3:15 pm-8:50 pm
1 stop6h 35m
$243
- 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.