$368+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPR
Sep 23 — Sep 301
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
One-way
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 24, 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 24, 2026.
This United Airlines deal was found by Cheapflights users on 8/20. 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.
Fri 9/45:00 am -
1 stop6h 45m
Tue 9/84:15 pm -
1 stop5h 38m
Deal found 8/20![United Airlines logo]()
$368
This United Airlines deal was found by Cheapflights users on 8/24. 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 8/24![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/175:00 am -
1 stop6h 35m
Sat 9/2611:23 am -
2 stops12h 36m
Deal found 8/23![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/65:00 am -
1 stop6h 45m
Sat 9/191:16 pm -
1 stop8h 37m
Deal found 8/23![United Airlines logo]()
$403
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/175:00 am -
1 stop4h 49m
Thu 9/241:20 pm -
1 stop8h 38m
Deal found 8/23![United Airlines logo]()
$433
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/101:18 pm -
1 stop6h 09m
Sun 9/134:15 pm -
1 stop5h 38m
Deal found 8/24![United Airlines logo]()
$448
This United Airlines deal was found by Cheapflights users on 8/22. 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 10/241:22 pm -
1 stop5h 55m
Mon 11/301:29 pm -
1 stop8h 22m
Deal found 8/22![United Airlines logo]()
$479
This United Airlines deal was found by Cheapflights users on 8/22. 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 8/235:00 am -
1 stop6h 45m
Sun 8/301:26 pm -
1 stop8h 27m
Deal found 8/22![United Airlines logo]()
$493
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 24, 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 24, 2026.
This United Airlines deal was found by Cheapflights users on 8/23. 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 8/23![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/175:00 am -
1 stop6h 35m
Sat 9/2611:23 am -
2 stops12h 36m
Deal found 8/23![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/65:00 am -
1 stop6h 45m
Sat 9/197:05 am -
2 stops12h 06m
Deal found 8/23![United Airlines logo]()
$409
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/101:18 pm -
1 stop6h 09m
Sun 9/134:15 pm -
1 stop5h 38m
Deal found 8/24![United Airlines logo]()
$448
This United Airlines deal was found by Cheapflights users on 8/22. 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 10/248:03 am -
2 stops11h 14m
Mon 11/305:57 pm -
2 stops19h 23m
Deal found 8/22![United Airlines logo]()
$502
This United Airlines deal was found by Cheapflights users on 8/20. 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.
Fri 9/45:00 am -
1 stop6h 45m
Tue 9/88:45 am -
2 stops12h 16m
Deal found 8/20![United Airlines logo]()
$527
Last-minute flights from Ontario to CasperDiscover last-minute flight deals from Ontario to Casper. Data last updated August 24, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Casper. Data last updated August 24, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/20. 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.
Fri 9/45:00 am -
1 stop6h 45m
Tue 9/84:15 pm -
1 stop5h 38m
Deal found 8/20![United Airlines logo]()
$368
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/65:00 am -
1 stop6h 45m
Sat 9/191:16 pm -
1 stop8h 37m
Deal found 8/23![United Airlines logo]()
$403
This United Airlines deal was found by Cheapflights users on 8/22. 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 9/65:00 am -
1 stop4h 48m
Thu 9/101:16 pm -
1 stop8h 37m
Deal found 8/22![United Airlines logo]()
$726
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/101:18 pm -
1 stop6h 09m
Sun 9/134:15 pm -
1 stop5h 38m
Deal found 8/24![United Airlines logo]()
$448
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/175:00 am -
1 stop6h 35m
Sat 9/263:11 pm -
1 stop6h 47m
Deal found 8/23![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/175:00 am -
1 stop4h 49m
Thu 9/241:20 pm -
1 stop8h 38m
Deal found 8/23![United Airlines logo]()
$433
One-way flights from Ontario to CasperSearch for one-way flight options from Ontario to Casper. Find affordable one-way fares based on user searches. Data last updated August 24, 2026.
Search for one-way flight options from Ontario to Casper. Find affordable one-way fares based on user searches. Data last updated August 24, 2026.
This United Airlines deal was found by Cheapflights users on 8/23. 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 8/305:00 am -
1 stop4h 49m
Deal found 8/23![United Airlines logo]()
$418
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 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $368 (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 7,457,451 searches. Data last updated August 24, 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
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
$388
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Thu 9/17
5:00 am-12:35 pm
1 stop6h 35m
Casper Natrona County
Sat 9/26
11:23 am-10:59 pm
2 stops12h 36m
$394
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Sun 9/6
5:00 am-12:45 pm
1 stop6h 45m
Casper Natrona County
Sat 9/19
7:05 am-6:11 pm
2 stops12h 06m
$409
Quickest round-trip
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Thu 9/10
1:18 pm-8:27 pm
1 stop6h 09m
Casper Natrona County
Sun 9/13
4:15 pm-8:53 pm
1 stop5h 38m
$448
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Sat 10/24
8:03 am-8:17 pm
2 stops11h 14m
Casper Natrona County
Mon 11/30
5:57 pm-12:20 pm
2 stops19h 23m
$502
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Fri 9/4
5:00 am-12:45 pm
1 stop6h 45m
Casper Natrona County
Tue 9/8
8:45 am-8:01 pm
2 stops12h 16m
$527
Cheapest one-way
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Mon 8/31
1:18 pm-7:09 pm
1 stop4h 51m
$418
Quickest one-way
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Sun 8/30
5:00 am-10:49 am
1 stop4h 49m
$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 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
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Casper flight routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Ontario
Popular flights