HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Casper

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

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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CPR
jul. 5 — jul. 121
dom. 7/5
dom. 7/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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 flights from Ontario to Casper
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 junio 5, 2026.

This United Airlines deal was found by Cheapflights users on 6/1. 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.
sáb. 8/295:00 am
ONT
-
CPR
1 stop6h 45m
United Airlines
mar. 9/15:15 am
CPR
-
ONT
1 stop8h 35m
United Airlines
Deal found 6/1$388
This United Airlines deal was found by Cheapflights users on 6/1. 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.
jue. 6/115:00 am
ONT
-
CPR
1 stop4h 46m
United Airlines
dom. 6/1411:21 am
CPR
-
ONT
1 stop7h 07m
United Airlines
Deal found 6/1$423
This United Airlines deal was found by Cheapflights users on 6/4. 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.
mar. 9/81:18 pm
ONT
-
CPR
1 stop7h 41m
United Airlines
mar. 9/155:15 am
CPR
-
ONT
1 stop8h 35m
United Airlines
Deal found 6/4$428
This United Airlines deal was found by Cheapflights users on 6/1. 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.
mié. 7/295:00 am
ONT
-
CPR
1 stop4h 46m
United Airlines
mar. 8/49:26 am
CPR
-
ONT
2 stops14h 11m
United Airlines
Deal found 6/1$434
This United Airlines deal was found by Cheapflights users on 6/3. 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.
jue. 9/101:18 pm
ONT
-
CPR
1 stop6h 09m
United Airlines
lun. 9/144:15 pm
CPR
-
ONT
1 stop5h 38m
United Airlines
Deal found 6/3$458
This United Airlines deal was found by Cheapflights users on 5/31. 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.
jue. 7/305:00 am
ONT
-
CPR
1 stop4h 46m
United Airlines
mar. 8/49:26 am
CPR
-
ONT
2 stops14h 11m
United Airlines
Deal found 5/31$474
This United Airlines deal was found by Cheapflights users on 6/2. 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.
sáb. 6/205:00 am
ONT
-
CPR
1 stop6h 42m
United Airlines
mié. 6/241:23 pm
CPR
-
ONT
1 stop5h 05m
United Airlines
Deal found 6/2$479
This United Airlines deal was found by Cheapflights users on 6/1. 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.
jue. 8/201:18 pm
ONT
-
CPR
1 stop7h 41m
United Airlines
mar. 8/258:45 am
CPR
-
ONT
2 stops12h 16m
United Airlines
Deal found 6/1$484
This United Airlines deal was found by Cheapflights users on 6/1. 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.
mié. 7/295:00 am
ONT
-
CPR
1 stop4h 46m
United Airlines
lun. 8/36:13 pm
CPR
-
ONT
1 stop19h 34m
United Airlines
Deal found 6/1$523

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 junio 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$388
(United Airlines)

One-way from

$308
(United Airlines)

Popular in

December

Cheapest in

March

Average price

$601
Provider with most accurate pricing for Ontario-Casper Natrona County flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Casper Natrona County flights.
Search Deals
From Ontario to Casper Natrona County
Search Deals
One-way flight from Ontario to Casper Natrona County
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 2,558,603 searches. Data last updated junio 5, 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

Price

Cheapest round-trip

OntarioCasper

ONT - CPR

ONTCPR

Ontario

sáb. 8/29

5:00 am-12:45 pm

1 stop6h 45m

Casper Natrona County

mar. 9/1

5:15 am-12:50 pm

1 stop8h 35m

$388

OntarioCasper

ONT - CPR

ONTCPR

Ontario

mar. 9/8

9:01 am-9:59 pm

2 stops11h 58m

Casper Natrona County

mar. 9/15

7:05 am-2:01 pm

2 stops7h 56m

$423
Quickest round-trip

OntarioCasper

ONT - CPR

ONTCPR

Ontario

jue. 9/10

1:18 pm-8:27 pm

1 stop6h 09m

Casper Natrona County

lun. 9/14

4:15 pm-8:53 pm

1 stop5h 38m

$458

OntarioCasper

ONT - CPR

ONTCPR

Ontario

jue. 8/20

1:18 pm-9:59 pm

1 stop7h 41m

Casper Natrona County

mar. 8/25

5:15 am-12:50 pm

1 stop8h 35m

$479
Cheapest one-way
Quickest one-way

OntarioCasper

ONT - CPR

ONTCPR

Ontario

dom. 7/12

5:00 am-10:46 am

1 stop4h 46m

$308

OntarioCasper

ONT - CPR

ONTCPR

Ontario

mar. 7/14

5:00 am-12:42 pm

1 stop6h 42m

$308

OntarioCasper

ONT - CPR

ONTCPR

Ontario

lun. 7/6

6:00 am-7:10 pm

2 stops12h 10m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/4

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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 Ontario to Casper. 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 Ontario to Casper?

    There are many flights that can get you from Ontario to Casper in 6h 45m. Fly via United Airlines to get the fastest option. Ontario and Casper are separated by a distance of 856 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Casper 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

Traveling to a place near Casper?

Book flights to Casper if you plan to visit one of these locations
Rawlins

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 for Ontario to Casper

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Denver flights
Los Angeles to Denver flights
Ontario to Denver flights
Los Angeles to Salt Lake City flights
Burbank to Denver flights
Santa Ana to Denver flights
San Jose to Denver flights
San Francisco to Salt Lake City flights
San Diego to Denver flights
Sacramento to Denver flights
Ontario to Salt Lake City flights
Las Vegas to Denver flights
San Jose to Salt Lake City flights
Burbank to Salt Lake City flights
San Diego to Salt Lake City flights
Santa Ana to Salt Lake City flights
Las Vegas to Salt Lake City flights
Los Angeles to Jackson flights
Oakland to Denver flights
San Francisco to Jackson flights
Sacramento to Salt Lake City flights
Oakland to Salt Lake City flights
Long Beach to Salt Lake City flights
Fresno to Denver flights
Reno to Denver flights
Long Beach to Denver flights
San Luis Obispo to Denver flights
Santa Barbara to Denver flights
Fresno to Salt Lake City flights
Monterey to Denver flights
Santa Rosa to Denver flights
Palm Springs to Denver flights
Reno to Salt Lake City flights
Ontario to Jackson flights
Bakersfield to Denver flights
Redding to Denver flights
Medford to Salt Lake City flights
Arcata to Denver flights
Medford to Denver flights
Palm Springs to Salt Lake City flights
San Diego to Jackson flights
Monterey to Salt Lake City flights
Burbank to Jackson flights
Santa Rosa to Salt Lake City flights
San Luis Obispo to Salt Lake City flights
Santa Barbara to Salt Lake City flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.