$243 Cheap Flights from Ontario (ONT) to Casper (CPR)

View $243 flight on Wed, Feb 18, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Casper, WY (CPR-Natrona County Intl.)

Cheap Flights from Ontario to Casper (ONT-CPR)

Prices were available within the past 7 days and start at $243 for one-way flights and $258 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Apr 10 - Mon, Apr 13
ONT
Ontario
CPR
Casper
$258 Roundtrip, found 5 days ago
$258
Roundtrip
found 5 days ago
Select United flight, departing Fri, Apr 10 from Ontario to Casper, returning Mon, Apr 13, priced at $258 found 5 days ago
United
Mon, May 4 - Sat, May 9
ONT
Ontario
CPR
Casper
$277 Roundtrip, found 4 days ago
$277
Roundtrip
found 4 days ago
Select United flight, departing Mon, May 4 from Ontario to Casper, returning Sat, May 9, priced at $277 found 4 days ago
United
Fri, Feb 13 - Wed, Feb 18
ONT
Ontario
CPR
Casper
$278 Roundtrip, found 5 days ago
$278
Roundtrip
found 5 days ago
Select United flight, departing Fri, Feb 13 from Ontario to Casper, returning Wed, Feb 18, priced at $278 found 5 days ago
United
Tue, May 5 - Sun, May 10
ONT
Ontario
CPR
Casper
$282 Roundtrip, found 2 days ago
$282
Roundtrip
found 2 days ago
Select United flight, departing Tue, May 5 from Ontario to Casper, returning Sun, May 10, priced at $282 found 2 days ago
United
Fri, Apr 3 - Tue, Apr 7
ONT
Ontario
CPR
Casper
$284 Roundtrip, found 4 days ago
$284
Roundtrip
found 4 days ago
Select United flight, departing Fri, Apr 3 from Ontario to Casper, returning Tue, Apr 7, priced at $284 found 4 days ago
United
Tue, May 5 - Sun, May 10
ONT
Ontario
CPR
Casper
$287 Roundtrip, found 2 days ago
$287
Roundtrip
found 2 days ago
Select United flight, departing Tue, May 5 from Ontario to Casper, returning Sun, May 10, priced at $287 found 2 days ago
United
Mon, May 4 - Sat, May 9
ONT
Ontario
CPR
Casper
$290 Roundtrip, found 4 days ago
$290
Roundtrip
found 4 days ago
Select United flight, departing Mon, May 4 from Ontario to Casper, returning Sat, May 9, priced at $290 found 4 days ago
United
Fri, Feb 13 - Wed, Feb 18
ONT
Ontario
CPR
Casper
$292 Roundtrip, found 5 days ago
$292
Roundtrip
found 5 days ago
Select United flight, departing Fri, Feb 13 from Ontario to Casper, returning Wed, Feb 18, priced at $292 found 5 days ago
United
Fri, Apr 3 - Tue, Apr 7
ONT
Ontario
CPR
Casper
$293 Roundtrip, found 4 days ago
$293
Roundtrip
found 4 days ago
Select United flight, departing Fri, Apr 3 from Ontario to Casper, returning Tue, Apr 7, priced at $293 found 4 days ago
United
Mon, Jun 1 - Sat, Jun 6
ONT
Ontario
CPR
Casper
$295 Roundtrip, found 2 days ago
$295
Roundtrip
found 2 days ago
Select United flight, departing Mon, Jun 1 from Ontario to Casper, returning Sat, Jun 6, priced at $295 found 2 days ago

Find the cheapest month to fly from Ontario (ONT) to Casper (CPR)

August is typically the cheapest month to fly

From $238 - $466 per traveler.
Flights from Ontario (ONT) to Casper (CPR)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Natrona County Intl.
Airlines serving
United
Roundtrip price
$258
Distance
855 mi

Ontario to Casper Flights

The cheapest times to fly from Ontario to Casper

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Casper are during the month of April. You can find some of the cheapest flights from Ontario to Casper with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Casper

Sunday is one of the best days to book for cheap flights from Ontario to Casper: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ontario to Casper

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Casper in 2026. You can also book with separate airlines for your outbound and return journeys, from $243 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Casper flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Casper airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR) cost?
Snag a cheap one-way flight from $243 or cheap return flight from $258 from Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR)?
The cheapest month to fly from ONT to CPR is April, when there's less demand. Off-peak months are generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest ONT to CPR flight.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR)?
Direct flights from Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ONT to CPR?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary based on a number of factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR)?
To avoid potential delays on the Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR) route, aim to travel before 3 PM. Later flights have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR) last-minute?
Waiting until just before your trip to book your flight from ONT to CPR often results in higher prices. While you may find some last-minute discounts, they're not always guaranteed. Keep your travel plans flexible to boost your chances of snagging a bargain.
Is it cheaper to book an ONT to CPR flight and hotel package?
Compared with arranging hotels and flights separately, booking an ONT to CPR flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place takes the hassle out of planning your trip. Simply secure your flights and select from our wide range of hotels, then tailor your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Natrona County Intl. Airport (CPR)?
Usually, it's possible to cancel or reschedule your ONT to CPR flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

*Flight schedules are subject to change.

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*Available to One Key members.