$268+ Cheap flights from Ontario to Casper (ONT - CPR)
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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPR
Oct 2 — Oct 91
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 September 2, 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 2, 2026.
This United Airlines deal was found by Cheapflights users on 8/31. 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
Tue 10/61:20 pm -
2 stops8h 11m
Deal found 8/31![United Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/1![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/298:03 am -
2 stops11h 14m
Thu 10/291:29 pm -
1 stop8h 22m
Deal found 8/31![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/30. 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 9/155:00 am -
1 stop6h 35m
Tue 9/228:45 am -
1 stop5h 05m
Deal found 8/30![United Airlines logo]()
$403
This United Airlines deal was found by Cheapflights users on 8/30. 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 9/36:08 am -
2 stops12h 01m
Sat 9/54:15 pm -
1 stop5h 38m
Deal found 8/30![United Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/39:01 am -
2 stops11h 58m
Mon 9/74:15 pm -
1 stop5h 38m
Deal found 8/31![United Airlines logo]()
$499
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 2, 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 2, 2026.
This United Airlines deal was found by Cheapflights users on 8/31. 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
Tue 10/61:20 pm -
2 stops8h 11m
Deal found 8/31![United Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 8/29. 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 8/29![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 8/31. 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
Thu 10/291:29 pm -
1 stop8h 22m
Deal found 8/31![United Airlines logo]()
$388
Last-minute flights from Ontario to CasperDiscover last-minute flight deals from Ontario to Casper. Data last updated September 2, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Casper. Data last updated September 2, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/30. 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 9/36:08 am -
2 stops12h 01m
Sat 9/54:15 pm -
1 stop5h 38m
Deal found 8/30![United Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/39:01 am -
2 stops11h 58m
Mon 9/74:15 pm -
1 stop5h 38m
Deal found 8/31![United Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/51:18 pm -
1 stop6h 09m
Mon 9/74:15 pm -
1 stop5h 38m
Deal found 9/1![United Airlines logo]()
$508
This United Airlines deal was found by Cheapflights users on 8/30. 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 9/155:00 am -
1 stop6h 35m
Tue 9/228:45 am -
1 stop5h 05m
Deal found 8/30![United Airlines logo]()
$403
This United Airlines deal was found by Cheapflights users on 8/31. 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
Tue 10/61:20 pm -
2 stops8h 11m
Deal found 8/31![United Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 8/31. 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
Thu 10/291:29 pm -
1 stop8h 22m
Deal found 8/31![United Airlines logo]()
$388
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 September 2, 2026.
Search for one-way flight options from Ontario to Casper. Find affordable one-way fares based on user searches. Data last updated September 2, 2026.
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/291:22 pm -
1 stop5h 55m
Deal found 8/31![United Airlines logo]()
$268
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 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $314 (United Airlines) |
One-way from | $268 (United Airlines) |
Popular in | May |
Cheapest in | November |
Average price | $298 |
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 2, 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
Quickest 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
Tue 10/6
1:20 pm-8:31 pm
2 stops8h 11m
$314
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
Tue 9/29
5:00 am-10:48 am
1 stop4h 48m
Casper Natrona County
Thu 10/29
1:29 pm-8:51 pm
1 stop8h 22m
$388
Cheapest one-way
Quickest one-way
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Tue 9/29
1:22 pm-8:17 pm
1 stop5h 55m
$268
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 2, 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.
Crew
8.1
Boarding
7.7
Entertainment
7.1
Comfort
7.3
Overall
7.4
Food
6.6
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Crew
8.1
Boarding
7.7
Entertainment
7.1
Comfort
7.3
Overall
7.4
Food
6.6
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
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
Alternative routes for Ontario to Casper
See prices for flight routes from nearby airports that may be better suited for you.
Other flights to Casper
Explore flights to Casper departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 2, 2026.
Complete your trip
Complete your trip to Casper by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Casper by cabin class
Find flights from Ontario to Casper, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Casper flights
Browse other Ontario and Casper flight options. Last updated on September 2, 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 2, 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 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$308 | Average$409 | FlexibilityNo cancel fee | On-time69% |