$278+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPR
Oct 8 — Oct 151
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
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 8, 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 8, 2026.
This United Airlines deal was found by Cheapflights users on 9/7. 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 9/7![United Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 9/5. 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 9/231:18 pm -
1 stop4h 41m
Sat 9/263:11 pm -
1 stop6h 47m
Deal found 9/5![United Airlines logo]()
$343
This United Airlines deal was found by Cheapflights users on 9/3. 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 9/3![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 9/5. 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 9/231:18 pm -
1 stop6h 09m
Sun 9/278:45 am -
1 stop5h 01m
Deal found 9/5![United Airlines logo]()
$416
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 8, 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 8, 2026.
This United Airlines deal was found by Cheapflights users on 9/5. 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 9/231:18 pm -
1 stop4h 41m
Sat 9/263:11 pm -
1 stop6h 47m
Deal found 9/5![United Airlines logo]()
$343
This United Airlines deal was found by Cheapflights users on 9/7. 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 9/7![United Airlines logo]()
$408
This United Airlines deal was found by Cheapflights users on 9/7. 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 9/291:52 pm -
2 stops7h 12m
Sat 10/33:11 pm -
2 stops8h 40m
Deal found 9/7![United Airlines logo]()
$412
This United Airlines deal was found by Cheapflights users on 9/3. 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 9/261:52 pm -
2 stops7h 12m
Fri 10/25:15 am -
1 stop8h 31m
Deal found 9/3![United Airlines logo]()
$484
This United Airlines deal was found by Cheapflights users on 9/3. 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 10/115:00 am -
1 stop6h 39m
Fri 10/161:20 pm -
1 stop24h 26m
Deal found 9/3![United Airlines logo]()
$501
Last-minute flights from Ontario to CasperDiscover last-minute flight deals from Ontario to Casper. Data last updated September 8, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Casper. Data last updated September 8, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/4. 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
Mon 9/144:15 pm -
1 stop5h 38m
Deal found 9/4![United Airlines logo]()
$493
This United Airlines deal was found by Cheapflights users on 9/5. 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 9/231:18 pm -
1 stop4h 41m
Sat 9/263:11 pm -
1 stop6h 47m
Deal found 9/5![United Airlines logo]()
$343
This United Airlines deal was found by Cheapflights users on 9/5. 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 9/231:18 pm -
1 stop6h 09m
Sun 9/278:45 am -
1 stop5h 01m
Deal found 9/5![United Airlines logo]()
$416
This United Airlines deal was found by Cheapflights users on 9/3. 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 9/261:52 pm -
2 stops7h 12m
Fri 10/25:15 am -
1 stop8h 31m
Deal found 9/3![United Airlines logo]()
$484
This United Airlines deal was found by Cheapflights users on 9/7. 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 9/7![United Airlines logo]()
$328
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 8, 2026.
Search for one-way flight options from Ontario to Casper. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.
This United Airlines deal was found by Cheapflights users on 9/6. 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
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![United Airlines logo]()
$278
This United Airlines deal was found by Cheapflights users on 9/4. 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 10/75:00 am -
1 stop4h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![United Airlines logo]()
$308
This United Airlines deal was found by Cheapflights users on 9/6. 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 10/111:24 pm -
1 stop5h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![United Airlines logo]()
$318
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 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $328 (United Airlines) |
One-way from | $278 (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 8, 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
Fri 10/9
5:00 am-10:48 am
1 stop4h 48m
Casper Natrona County
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$308
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Wed 10/7
5:00 am-10:48 am
1 stop4h 48m
Casper Natrona County
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$308
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Sun 10/11
1:24 pm-8:17 pm
1 stop5h 53m
Casper Natrona County
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$318
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Wed 9/23
1:18 pm-6:59 pm
1 stop4h 41m
Casper Natrona County
Sat 9/26
3:11 pm-8:58 pm
1 stop6h 47m
$343
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
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Tue 9/29
1:52 pm-10:04 pm
2 stops7h 12m
Casper Natrona County
Sat 10/3
3:11 pm-10:51 pm
2 stops8h 40m
$412
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Sat 9/26
1:52 pm-10:04 pm
2 stops7h 12m
Casper Natrona County
Fri 10/2
5:15 am-12:46 pm
1 stop8h 31m
$484
OntarioCasper
ONT Ontario - CPR Casper Natrona County
ONTCPR
Ontario
Sun 10/11
5:00 am-12:39 pm
1 stop6h 39m
Casper Natrona County
Fri 10/16
1:20 pm-12:46 pm
1 stop24h 26m
$501
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 8, 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.
Food
6.7
Entertainment
7.1
Boarding
7.7
Comfort
7.3
Overall
7.4
Crew
8.1
Reviews
1 / 20
4.0
OkayDynasty,May 2026
LAX - EWR
Food
6.7
Entertainment
7.1
Boarding
7.7
Comfort
7.3
Overall
7.4
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
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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 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$308 | Average$409 | FlexibilityNo cancel fee | On-time69% |