$278+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ONT
Nov 8 — Nov 151
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 October 9, 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 October 9, 2026.
This United Airlines deal was found by Cheapflights users on 10/4. 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 11/121:29 pm -
2 stops10h 19m
Sun 11/155:00 am -
1 stop4h 49m
Deal found 10/4![United Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 10/7. 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 11/148:20 am -
1 stop5h 13m
Tue 11/175:00 am -
1 stop4h 49m
Deal found 10/7![United Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 10/6. 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.
Tue 10/201:20 pm -
1 stop8h 38m
Tue 11/35:00 am -
1 stop4h 49m
Deal found 10/6![United Airlines logo]()
$443
This United Airlines deal was found by Cheapflights users on 10/4. 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 12/231:19 pm -
1 stop8h 41m
Wed 12/305:00 am -
1 stop4h 58m
Deal found 10/4![United Airlines logo]()
$519
This United Airlines deal was found by Cheapflights users on 10/9. 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 10/301:29 pm -
2 stops10h 19m
Mon 11/25:00 am -
1 stop4h 49m
Deal found 10/9![United Airlines logo]()
$524
Best flights from Casper to OntarioDiscover carefully curated flight deals from Casper to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
Discover carefully curated flight deals from Casper to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
This United Airlines deal was found by Cheapflights users on 10/4. 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 11/121:29 pm -
2 stops10h 19m
Sun 11/155:00 am -
1 stop4h 49m
Deal found 10/4![United Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 10/8. 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 11/148:20 am -
1 stop5h 13m
Tue 11/175:00 am -
1 stop4h 49m
Deal found 10/8![United Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 10/5. 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.
Sat 10/311:29 pm -
1 stop8h 22m
Tue 11/35:00 am -
1 stop6h 48m
Deal found 10/5![United Airlines logo]()
$428
Last-minute flights from Casper to OntarioDiscover last-minute flight deals from Casper to Ontario. Data last updated October 9, 2026 and is based on user searches.
Discover last-minute flight deals from Casper to Ontario. Data last updated October 9, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/6. 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.
Tue 10/201:20 pm -
1 stop8h 38m
Tue 11/35:00 am -
1 stop4h 49m
Deal found 10/6![United Airlines logo]()
$443
This United Airlines deal was found by Cheapflights users on 10/9. 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 10/301:29 pm -
2 stops10h 19m
Mon 11/25:00 am -
1 stop4h 49m
Deal found 10/9![United Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 10/4. 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 11/121:29 pm -
2 stops10h 19m
Sun 11/155:00 am -
1 stop4h 49m
Deal found 10/4![United Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 10/7. 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 11/148:20 am -
1 stop5h 13m
Tue 11/175:00 am -
1 stop4h 49m
Deal found 10/7![United Airlines logo]()
$428
One-way flights from Casper to OntarioSearch for one-way flight options from Casper to Ontario. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
Search for one-way flight options from Casper to Ontario. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
This United Airlines deal was found by Cheapflights users on 10/4. 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 11/127:00 am -
1 stop6h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![United Airlines logo]()
$278
This United Airlines deal was found by Cheapflights users on 10/7. 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.
Fri 10/163:11 pm -
1 stop6h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![United Airlines logo]()
$423
This United Airlines deal was found by Cheapflights users on 10/5. 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.
Thu 10/157:15 am -
3 stops14h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![United Airlines logo]()
$2,581
Find 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 October 9, 2026.
Most accurate provider | Expedia 1 star |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $334 (United Airlines) |
One-way from | $278 (United Airlines) |
Popular in | June |
Cheapest in | April |
Average price | $409 |
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 7,457,451 searches. Data last updated October 9, 2026.
Use the filters below to find and compare flights from Casper to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Mon 11/16
3:13 pm-8:51 pm
1 stop6h 38m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$278
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Thu 11/12
5:15 am-12:29 pm
2 stops8h 14m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$284
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Thu 11/12
1:29 pm-10:48 pm
2 stops10h 19m
Ontario
Sun 11/15
5:00 am-10:49 am
1 stop4h 49m
$334
Quickest round-trip
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Fri 10/16
8:00 am-12:46 pm
1 stop5h 46m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$423
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Thu 10/15
3:11 pm-8:58 pm
1 stop6h 47m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$423
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Sat 11/14
8:20 am-12:33 pm
1 stop5h 13m
Ontario
Tue 11/17
5:00 am-10:49 am
1 stop4h 49m
$428
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Sat 10/31
1:29 pm-8:51 pm
1 stop8h 22m
Ontario
Tue 11/3
5:00 am-12:48 pm
1 stop6h 48m
$428
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Casper-Ontario flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Casper-Ontario flight deals on Cheapflights vs. Expedia <90% 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 Expedia the most. Expedia 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.
CPR-ONT
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 Casper to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from Casper
Popular flights