$258+ Cheap flights from Casper to Ontario (CPR - ONT)
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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ONT
Feb 7 — Feb 141
1 adult, Economy
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Find cheap flights from Casper to Ontario 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 Casper to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Casper (CPR) to Ontario (ONT). 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 January 8, 2026.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $258 (United Airlines) |
Popular in | December |
Cheapest in | February |
Find flight deals from Casper to Ontario
Cheapest flights from Casper to OntarioExplore the most affordable flight options available from Casper to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.
Explore the most affordable flight options available from Casper to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2026.
This United Airlines deal was found by Cheapflights users on 1/6. 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.
Wed 2/43:17 pmCPR - ONT
1 stop6h 41mUnited Airlines
Mon 2/95:05 amONT - CPR
1 stop4h 48mUnited Airlines
Deal found 1/6![United Airlines logo]()
$258
This United Airlines deal was found by Cheapflights users on 1/7. 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.
Sat 1/171:16 pmCPR - ONT
1 stop8h 42mUnited Airlines
Wed 1/211:24 pmONT - CPR
1 stop4h 42mUnited Airlines
Deal found 1/7![United Airlines logo]()
$368
This United Airlines deal was found by Cheapflights users on 1/8. 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 1/93:17 pmCPR - ONT
1 stop6h 41mUnited Airlines
Fri 1/165:05 amONT - CPR
1 stop4h 48mUnited Airlines
Deal found 1/8![United Airlines logo]()
$413
This United Airlines deal was found by Cheapflights users on 1/8. 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 3/213:15 pmCPR - ONT
1 stop6h 35mUnited Airlines
Sat 3/285:15 amONT - CPR
1 stop8h 25mUnited Airlines
Deal found 1/8![United Airlines logo]()
$710
Cheapflights Fare Finder
Customize your flight search to find flights from Casper to Ontario 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 January 8, 2026.
Use the filters below to find and compare flights from Casper to Ontario that are best for you.
Fly from
Casper
Fly to
Ontario
Route
Depart
Return
Price
CasperOntario
CPR - ONT
CPRONT
Casper Natrona County
Wed 2/4
3:17 pm-8:58 pm
1 stop6h 41m
Ontario
Mon 2/9
5:05 am-10:53 am
1 stop4h 48m
$258
CasperOntario
CPR - ONT
CPRONT
Casper Natrona County
Tue 2/10
5:30 am-12:47 pm
1 stop8h 17m
Ontario
Sun 2/15
5:00 am-12:40 pm
1 stop6h 40m
$328
CasperOntario
CPR - ONT
CPRONT
Casper Natrona County
Sat 3/21
3:15 pm-8:50 pm
1 stop6h 35m
Ontario
Sat 3/28
5:15 am-2:40 pm
1 stop8h 25m
$710
CasperOntario
CPR - ONT
CPRONT
Casper Natrona County
Sat 3/21
3:15 pm-8:50 pm
1 stop6h 35m
Ontario
Sun 3/29
1:34 pm-10:07 pm
1 stop7h 33m
$1,233
Compare providers for flights from Casper to Ontario
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 Casper to Ontario in January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Casper-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Casper-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Casper-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Casper-Ontario flights, Cheapflights users trust eDreams the most. eDreams 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 Casper-Ontario 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 Casper to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Casper with our price prediction graph.
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.