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Ontario

$308+ Cheap flights from Casper to Ontario (CPR - ONT)

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 6/30. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — ONT
Jun 12 — Jun 191
Fri 6/12
Fri 6/19
1 adult, Economy
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Cheap flight deals from Casper to Ontario

Cheapest flights from Casper to Ontario
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 May 13, 2026.

This United Airlines deal was found by Cheapflights users on 5/13. 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 12/301:25 pm
CPR
-
ONT
1 stop7h 55m
United Airlines
Mon 1/41:00 pm
ONT
-
CPR
1 stop8h 12m
United Airlines
Deal found 5/13$479
This United Airlines deal was found by Cheapflights users on 5/13. 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 12/275:30 am
CPR
-
ONT
1 stop8h 03m
United Airlines
Mon 1/41:00 pm
ONT
-
CPR
1 stop8h 12m
United Airlines
Deal found 5/13$524
This United Airlines deal was found by Cheapflights users on 5/13. 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 12/285:30 am
CPR
-
ONT
1 stop8h 03m
United Airlines
Fri 1/15:00 am
ONT
-
CPR
1 stop4h 53m
United Airlines
Deal found 5/13$529
This United Airlines deal was found by Cheapflights users on 5/10. 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.
Tue 12/221:25 pm
CPR
-
ONT
1 stop7h 55m
United Airlines
Thu 1/76:00 am
ONT
-
CPR
2 stops10h 04m
United Airlines
Deal found 5/10$569
This United Airlines deal was found by Cheapflights users on 5/13. 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 12/297:00 am
CPR
-
ONT
2 stops11h 47m
United Airlines
Fri 1/15:00 am
ONT
-
CPR
1 stop4h 53m
United Airlines
Deal found 5/13$613
This United Airlines deal was found by Cheapflights users on 5/13. 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 12/305:30 am
CPR
-
ONT
1 stop8h 03m
United Airlines
Thu 12/311:00 pm
ONT
-
CPR
1 stop4h 37m
United Airlines
Deal found 5/13$616
This United Airlines deal was found by Cheapflights users on 5/13. 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 12/275:30 am
CPR
-
ONT
1 stop8h 03m
United Airlines
Fri 1/11:00 pm
ONT
-
CPR
1 stop8h 12m
United Airlines
Deal found 5/13$647
This United Airlines deal was found by Cheapflights users on 5/13. 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 12/275:30 am
CPR
-
ONT
1 stop8h 03m
United Airlines
Sun 1/31:00 pm
ONT
-
CPR
1 stop8h 12m
United Airlines
Deal found 5/13$664
This United Airlines deal was found by Cheapflights users on 5/10. 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.
Mon 5/2511:21 am
CPR
-
ONT
1 stop7h 07m
United Airlines
Fri 5/291:50 pm
ONT
-
CPR
2 stops23h 50m
United Airlines
Deal found 5/10$668
This United Airlines deal was found by Cheapflights users on 5/13. 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 12/285:30 am
CPR
-
ONT
1 stop8h 03m
United Airlines
Sun 1/35:00 am
ONT
-
CPR
1 stop8h 40m
United Airlines
Deal found 5/13$669
This United Airlines deal was found by Cheapflights users on 5/13. 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 12/297:00 am
CPR
-
ONT
2 stops11h 47m
United Airlines
Sat 1/25:00 am
ONT
-
CPR
1 stop8h 40m
United Airlines
Deal found 5/13$753

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 May 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$668
(United Airlines)

One-way from

$308
(United Airlines)

Popular in

March

Cheapest in

April

Average price

$398
Provider with most accurate pricing for Casper Natrona County-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Casper Natrona County-Ontario flights.
Search Deals
From Casper Natrona County to Ontario
Search Deals
One-way flight from Casper Natrona County to Ontario
Search Deals
High demand for flights, 3% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 May 13, 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

Price

Cheapest round-trip

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Mon 5/25

11:21 am-5:28 pm

1 stop7h 07m

Ontario

Fri 5/29

1:50 pm-2:40 pm

2 stops23h 50m

$668
Quickest round-trip

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Mon 5/25

1:23 pm-5:28 pm

1 stop5h 05m

Ontario

Wed 5/27

1:18 pm-7:15 pm

1 stop4h 57m

$771
Cheapest one-way
Quickest one-way

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Tue 6/30

8:45 am-12:47 pm

1 stop5h 02m

$308

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Sun 5/31

3:15 pm-8:42 pm

1 stop6h 27m

$358

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Wed 5/20

5:25 am-12:38 pm

1 stop8h 13m

$419

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Mon 6/22

1:23 pm-5:28 pm

1 stop5h 05m

$466

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/9

Sorted by cheapest first
  • Most accurate provider: When it comes to deals on Casper-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Casper-Ontario flight deals on Cheapflights vs. FlightHub >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 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 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.

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.

  • How long is the flight from Casper to Ontario?

    Airlines like United Airlines fly from Casper to Ontario in about 7h 07m. The time it takes to get you to your destination can typically vary by up to . The distance from Casper to Ontario is about 856 mi.

  • Can I find deals for flights from Casper to Ontario that include hotel bookings?

    Yes. In addition to deals on Casper to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Casper to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Casper to Ontario.

  • Can I find deals for business class flights from Casper to Ontario?

    Yes. Cheapflights offers flight deals from Casper to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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