$308+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPR
Sep 17 — Sep 241
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
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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 August 18, 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 August 18, 2026.
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/135:00 am -
1 stop6h 35m
Sun 9/204:15 pm -
1 stop5h 38m
Deal found 8/16![United Airlines logo]()
$308
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/25:00 am -
1 stop6h 45m
Sun 9/67:05 am -
1 stop6h 45m
Deal found 8/17![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 8/17. 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 stop7h 40m
Mon 10/121:20 pm -
1 stop8h 38m
Deal found 8/17![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/13. 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 12/85:00 am -
1 stop4h 53m
Sat 12/127:00 am -
2 stops11h 47m
Deal found 8/13![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/17. 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 12/36:00 am -
2 stops11h 37m
Sun 12/65:30 am -
2 stops7h 50m
Deal found 8/17![United Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/11:18 pm -
1 stop4h 51m
Sat 9/58:45 am -
1 stop5h 05m
Deal found 8/18![United Airlines logo]()
$418
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 9/181:18 pm -
1 stop7h 41m
Sun 9/204:15 pm -
1 stop5h 38m
Deal found 8/18![United Airlines logo]()
$433
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 August 18, 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 August 18, 2026.
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/26:08 am -
2 stops10h 10m
Sun 9/65:15 am -
2 stops7h 57m
Deal found 8/17![United Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/301:24 pm -
1 stop5h 53m
Tue 10/65:15 am -
1 stop8h 31m
Deal found 8/16![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/16. 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 45m
Fri 10/161:20 pm -
1 stop8h 38m
Deal found 8/16![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/17. 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 stop7h 40m
Mon 10/121:20 pm -
1 stop8h 38m
Deal found 8/17![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/119:01 am -
2 stops10h 26m
Sun 9/131:16 pm -
1 stop8h 37m
Deal found 8/17![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 9/181:18 pm -
1 stop7h 41m
Sun 9/204:15 pm -
1 stop5h 38m
Deal found 8/18![United Airlines logo]()
$433
This United Airlines deal was found by Cheapflights users on 8/14. 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 12/86:00 am -
2 stops15h 12m
Sat 12/1211:25 am -
2 stops12h 41m
Deal found 8/14![United Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 8/16. 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 10/285:00 am -
1 stop8h 38m
Sun 11/15:57 pm -
1 stop27h 54m
Deal found 8/16![United Airlines logo]()
$461
Last-minute flights from Ontario to CasperDiscover last-minute flight deals from Ontario to Casper. Data last updated August 18, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Casper. Data last updated August 18, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/11:18 pm -
1 stop4h 51m
Sat 9/58:45 am -
1 stop5h 05m
Deal found 8/18![United Airlines logo]()
$418
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/25:00 am -
1 stop6h 45m
Sun 9/67:05 am -
1 stop6h 45m
Deal found 8/17![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 8/14. 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 9/35:00 am -
1 stop8h 46m
Mon 9/76:05 pm -
1 stop27h 48m
Deal found 8/14![United Airlines logo]()
$526
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/115:00 am -
1 stop4h 49m
Sun 9/131:16 pm -
1 stop8h 37m
Deal found 8/17![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/135:00 am -
1 stop6h 35m
Sun 9/204:15 pm -
1 stop5h 38m
Deal found 8/16![United Airlines logo]()
$308
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 9/181:18 pm -
1 stop7h 41m
Sun 9/204:15 pm -
1 stop5h 38m
Deal found 8/18![United Airlines logo]()
$433
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 August 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $308 (United Airlines) |
Popular in | May |
Cheapest in | November |
Average price | $398 |
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 August 18, 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
Wed 9/2
6:08 am-5:18 pm
2 stops10h 10m
Casper Natrona County
Sun 9/6
5:15 am-12:12 pm
2 stops7h 57m
$349
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Wed 9/30
1:24 pm-8:17 pm
1 stop5h 53m
Casper Natrona County
Tue 10/6
5:15 am-12:46 pm
1 stop8h 31m
$388
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Fri 10/9
1:24 pm-7:09 pm
1 stop4h 45m
Casper Natrona County
Fri 10/16
1:20 pm-8:58 pm
1 stop8h 38m
$388
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Fri 10/9
1:24 pm-10:04 pm
1 stop7h 40m
Casper Natrona County
Mon 10/12
1:20 pm-8:58 pm
1 stop8h 38m
$388
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Fri 9/11
9:01 am-8:27 pm
2 stops10h 26m
Casper Natrona County
Sun 9/13
1:16 pm-8:53 pm
1 stop8h 37m
$394
Quickest round-trip
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Fri 9/18
1:18 pm-9:59 pm
1 stop7h 41m
Casper Natrona County
Sun 9/20
4:15 pm-8:53 pm
1 stop5h 38m
$433
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Tue 12/8
6:00 am-10:12 pm
2 stops15h 12m
Casper Natrona County
Sat 12/12
11:25 am-11:06 pm
2 stops12h 41m
$444
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Wed 10/28
5:00 am-2:38 pm
1 stop8h 38m
Casper Natrona County
Sun 11/1
5:57 pm-8:51 pm
1 stop27h 54m
$461
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 August.
| 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.
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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