$328+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPR
Oct 15 — Oct 221
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Casper with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 Ontario to Casper
Cheapest
Best
Last-minute
Cheapest flights from Ontario to CasperExplore 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, 2026.
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, 2026.
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 10/155:00 am -
1 stop4h 48m
Sun 10/183:11 pm -
1 stop6h 47m
Deal found 9/14![United Airlines logo]()
$328
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.
Tue 9/295:00 am -
1 stop4h 48m
Sat 10/33:11 pm -
1 stop6h 47m
Deal found 9/14![United Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/105:00 am -
1 stop8h 36m
Sat 10/173:11 pm -
1 stop6h 47m
Deal found 9/11![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 11/61:32 pm -
1 stop7h 27m
Tue 11/107:15 am -
2 stops11h 46m
Deal found 9/10![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 9/255:00 am -
1 stop8h 36m
Tue 9/293:11 pm -
1 stop6h 47m
Deal found 9/10![United Airlines logo]()
$418
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 10/91:24 pm -
1 stop5h 53m
Fri 10/163:11 pm -
1 stop6h 47m
Deal found 9/11![United Airlines logo]()
$439
Best flights from Ontario to CasperDiscover carefully curated flight deals from Ontario to Casper that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.
Discover carefully curated flight deals from Ontario to Casper that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.
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.
Tue 9/295:00 am -
1 stop4h 48m
Sat 10/33:11 pm -
1 stop6h 47m
Deal found 9/14![United Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 11/65:00 am -
1 stop6h 48m
Tue 11/103:13 pm -
1 stop6h 38m
Deal found 9/10![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/105:00 am -
1 stop8h 36m
Sat 10/173:11 pm -
1 stop6h 47m
Deal found 9/11![United Airlines logo]()
$388
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 11/125:00 am -
1 stop4h 49m
Mon 11/161:29 pm -
1 stop8h 22m
Deal found 9/14![United Airlines logo]()
$408
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.
Fri 10/91:24 pm -
1 stop4h 30m
Mon 10/123:11 pm -
1 stop6h 47m
Deal found 9/14![United Airlines logo]()
$408
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 9/255:00 am -
1 stop8h 36m
Tue 9/293:11 pm -
1 stop6h 47m
Deal found 9/10![United Airlines logo]()
$418
Last-minute flights from Ontario to CasperDiscover last-minute flight deals from Ontario to Casper. Data last updated September 15, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Casper. Data last updated September 15, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 9/255:00 am -
1 stop8h 36m
Tue 9/293:11 pm -
1 stop6h 47m
Deal found 9/10![United Airlines logo]()
$418
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.
Tue 9/295:00 am -
1 stop4h 48m
Sat 10/33:11 pm -
1 stop6h 47m
Deal found 9/14![United Airlines logo]()
$358
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.
Fri 10/91:24 pm -
1 stop4h 30m
Mon 10/123:11 pm -
1 stop6h 47m
Deal found 9/14![United Airlines logo]()
$408
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 10/95:00 am -
1 stop6h 39m
Fri 10/1610:06 am -
2 stops13h 45m
Deal found 9/11![United Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/105:00 am -
1 stop8h 36m
Sat 10/173:11 pm -
1 stop6h 47m
Deal found 9/11![United Airlines logo]()
$388
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 10/155:00 am -
1 stop4h 48m
Sun 10/183:11 pm -
1 stop6h 47m
Deal found 9/14![United Airlines logo]()
$328
Find 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, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $328 (United Airlines) |
Popular in | May |
Cheapest in | November |
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 7,457,451 searches. Data last updated September 15, 2026.
Use the filters below to find and compare flights from Ontario to Casper that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Tue 9/29
5:00 am-10:48 am
1 stop4h 48m
Casper Natrona County
Sat 10/3
3:11 pm-8:58 pm
1 stop6h 47m
$358
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Fri 11/6
5:00 am-12:48 pm
1 stop6h 48m
Casper Natrona County
Tue 11/10
3:13 pm-8:51 pm
1 stop6h 38m
$388
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Sat 10/10
5:00 am-2:36 pm
1 stop8h 36m
Casper Natrona County
Sat 10/17
3:11 pm-8:58 pm
1 stop6h 47m
$388
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Thu 11/12
5:00 am-10:49 am
1 stop4h 49m
Casper Natrona County
Mon 11/16
1:29 pm-8:51 pm
1 stop8h 22m
$408
Quickest round-trip
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Fri 10/9
1:24 pm-6:54 pm
1 stop4h 30m
Casper Natrona County
Mon 10/12
3:11 pm-8:58 pm
1 stop6h 47m
$408
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Fri 9/25
5:00 am-2:36 pm
1 stop8h 36m
Casper Natrona County
Tue 9/29
3:11 pm-8:58 pm
1 stop6h 47m
$418
Sorted by cheapest first
Compare providers for flights from Ontario to Casper
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 Casper in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Casper flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Casper flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Casper flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Casper 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-Casper 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 Casper
Have a flexible travel schedule? Discover the best time to fly to Casper from Ontario with our price prediction graph.
ONT-CPR
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, 2026.
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.
Entertainment
7.1
Food
6.7
Overall
7.4
Comfort
7.3
Boarding
7.7
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Entertainment
7.1
Food
6.7
Overall
7.4
Comfort
7.3
Boarding
7.7
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
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.
Traveling to a place near Casper?
Book flights to Casper if you plan to visit one of these locationsRawlins
Douglas
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Ontario and Casper flights
Browse other Ontario and Casper flight options. Last updated on September 15, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on September 15, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated September 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$308 | Average$409 | FlexibilityNo cancel fee | On-time69% |