$343+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ONT
Dec 12 — Dec 191
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 November 12, 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 November 12, 2026.
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 11/2211:24 am -
2 stops9h 51m
Thu 11/265:00 am -
1 stop6h 48m
Deal found 11/7![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 11/7. 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 12/51:21 pm -
1 stop8h 50m
Tue 12/81:40 pm -
1 stop4h 19m
Deal found 11/7![United Airlines logo]()
$458
This United Airlines deal was found by Cheapflights users on 11/7. 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 11/195:15 am -
2 stops8h 14m
Tue 12/15:00 am -
1 stop6h 40m
Deal found 11/7![United Airlines logo]()
$460
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Mon 12/285:15 am -
1 stop8h 27m
Sat 1/25:00 am -
1 stop8h 43m
Deal found 11/8![United Airlines logo]()
$518
This United Airlines deal was found by Cheapflights users on 11/8. 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 11/171:29 pm -
1 stop4h 24m
Deal found 11/8![United Airlines logo]()
$563
This United Airlines deal was found by Cheapflights users on 11/12. 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 11/273:13 pm -
1 stop6h 38m
Tue 12/15:00 am -
1 stop6h 40m
Deal found 11/12![United Airlines logo]()
$568
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/263:18 pm -
1 stop6h 42m
Fri 1/15:00 am -
1 stop4h 58m
Deal found 11/8![United Airlines logo]()
$572
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Sun 12/278:30 am -
1 stop5h 12m
Fri 1/15:00 am -
1 stop4h 58m
Deal found 11/8![United Airlines logo]()
$607
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 November 12, 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 November 12, 2026.
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 11/2211:24 am -
2 stops9h 51m
Thu 11/265:00 am -
1 stop6h 48m
Deal found 11/7![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 11/11. 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 1/309:00 am -
1 stop4h 40m
Wed 2/35:00 am -
1 stop8h 43m
Deal found 11/11![United Airlines logo]()
$458
This United Airlines deal was found by Cheapflights users on 11/11. 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 2/188:50 am -
1 stop4h 49m
Tue 2/235:00 am -
1 stop6h 47m
Deal found 11/11![United Airlines logo]()
$458
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Mon 12/285:15 am -
1 stop8h 27m
Sat 1/25:00 am -
1 stop8h 43m
Deal found 11/8![United Airlines logo]()
$518
Last-minute flights from Casper to OntarioDiscover last-minute flight deals from Casper to Ontario. Data last updated November 12, 2026 and is based on user searches.
Discover last-minute flight deals from Casper to Ontario. Data last updated November 12, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 11/8. 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 11/171:29 pm -
1 stop4h 24m
Deal found 11/8![United Airlines logo]()
$563
This United Airlines deal was found by Cheapflights users on 11/7. 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 11/195:15 am -
2 stops8h 14m
Tue 12/15:00 am -
1 stop6h 40m
Deal found 11/7![United Airlines logo]()
$460
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Sun 11/2211:24 am -
2 stops9h 51m
Thu 11/265:00 am -
1 stop6h 48m
Deal found 11/7![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 11/12. 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 11/273:13 pm -
1 stop6h 38m
Tue 12/15:00 am -
1 stop6h 40m
Deal found 11/12![United Airlines logo]()
$568
This United Airlines deal was found by Cheapflights users on 11/7. 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 12/51:21 pm -
1 stop8h 50m
Tue 12/81:40 pm -
1 stop4h 19m
Deal found 11/7![United Airlines logo]()
$458
This United Airlines deal was found by Cheapflights users on 11/8. 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 12/263:18 pm -
1 stop6h 42m
Fri 1/15:00 am -
1 stop4h 58m
Deal found 11/8![United Airlines logo]()
$572
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Sun 12/278:30 am -
1 stop5h 12m
Fri 1/15:00 am -
1 stop4h 58m
Deal found 11/8![United Airlines logo]()
$607
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Mon 12/285:15 am -
1 stop8h 27m
Sat 1/25:00 am -
1 stop8h 43m
Deal found 11/8![United Airlines logo]()
$518
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 November 12, 2026.
Search for one-way flight options from Casper to Ontario. Find affordable one-way fares based on user searches. Data last updated November 12, 2026.
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Wed 1/209:00 am -
1 stop4h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![United Airlines logo]()
$343
This United Airlines deal was found by Cheapflights users on 11/10. 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 11/205:15 am -
2 stops8h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![United Airlines logo]()
$444
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 November 12, 2026.
Most accurate provider | eDreams 2 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $394 (United Airlines) |
One-way from | $343 (United Airlines) |
Popular in | June |
Cheapest in | April |
Average price | $355 |
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 November 12, 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
Quickest round-trip
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Wed 1/20
9:00 am-12:40 pm
1 stop4h 40m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$343
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Sun 11/22
11:24 am-8:15 pm
2 stops9h 51m
Ontario
Thu 11/26
5:00 am-12:48 pm
1 stop6h 48m
$394
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Fri 11/20
5:15 am-12:29 pm
2 stops8h 14m
Ontario
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$444
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Sat 1/30
9:00 am-12:40 pm
1 stop4h 40m
Ontario
Wed 2/3
5:00 am-2:43 pm
1 stop8h 43m
$458
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Thu 2/18
8:50 am-12:39 pm
1 stop4h 49m
Ontario
Tue 2/23
5:00 am-12:47 pm
1 stop6h 47m
$458
CasperOntario
CPR Casper Natrona County - ONT Ontario
CPRONT
Casper Natrona County
Mon 12/28
5:15 am-12:42 pm
1 stop8h 27m
Ontario
Sat 1/2
5:00 am-2:43 pm
1 stop8h 43m
$518
Sorted by cheapest first
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 November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | 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 90-95% 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.
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