What is the cheapest airline to fly from Ontario to Casper round-trip?

Currently priced at $306, United Airlines will fly you from Ontario to Casper and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. United Airlines is priced at 25% lower than the current average price of a flight leaving 3 months from now.

What is the cheapest day to fly from Ontario to Casper?

Travelers seeking maximum savings on their Ontario to Casper flight should consider departing on Friday mornings when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Casper ranges from 0.5 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. January is typically the driest time to visit Casper when rainfall is around 0.5 in.

If weather is an important factor for your trip to Casper, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 23.0 F).

What is the cheapest day to fly round-trip from Ontario to Casper?

Travelers have found that booking a Thursday departure is the best way to save up to 8% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

What is the cheapest month to fly from Ontario to Casper?

April can be a great time to fly to Casper from Ontario with a flight ticket averaging about $401. Cheapflights users have found deals in the month of April for as cheap as $255. The most expensive prices can be found in the month of March.

What is the cheapest time of day to fly from ONT to CPR?

It’s typically best to fly out from Ontario to Casper at noon. Doing so could potentially save you 11% on the flight price compared to flying in the morning, which is usually more expensive.

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.

$306+ Flights from Ontario to Casper

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Cheap flight deals from Ontario to Casper

Round-trip from	$306 (United Airlines)
Popular in	March
Cheapest in	April
Average price	$376

From Ontario to Casper Natrona County

Search Deals

High demand for flights, 0% potential price rise

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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in June 2025

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Find 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 30, 2025.

dom. 7/135:05 amONT - CPR

1 stop6h 34mUnited Airlines

vie. 8/81:28 pmCPR - ONT

1 stop4h 57mUnited Airlines

Deal found 6/29

$306

Best flights from Ontario to Casper
Discover carefully curated flight deals from Ontario to Casper that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated junio 30, 2025.

dom. 7/135:05 amONT - CPR

1 stop6h 34mUnited Airlines

vie. 8/81:28 pmCPR - ONT

1 stop4h 57mUnited Airlines

Deal found 6/29

$306

Last-minute flights from Ontario to Casper
Discover last-minute flight deals from Ontario to Casper. Data last updated junio 30, 2025 and is based on user searches.

mié. 7/95:05 amONT - CPR

1 stop4h 49mUnited Airlines

dom. 7/133:16 pmCPR - ONT

1 stop27h 09mUnited Airlines

Deal found 6/29

$597

dom. 7/135:05 amONT - CPR

1 stop6h 34mUnited Airlines

vie. 8/81:28 pmCPR - ONT

1 stop4h 57mUnited Airlines

Deal found 6/29

$306

One-way flights from Ontario to Casper
Search for one-way flight options from Ontario to Casper. Find affordable one-way fares based on user searches. Data last updated junio 30, 2025.

vie. 7/111:34 pmONT - CPR

1 stop5h 52mUnited Airlines

Deal found 6/30

$369

Cheapflights Fare Finder

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

OntarioCasper

ONT - CPR

ONTCPR

Ontario

dom. 7/13

5:05 am-12:39 pm

1 stop6h 34m

Casper Natrona County

vie. 8/8

1:28 pm-5:25 pm

1 stop4h 57m

$306

OntarioCasper

ONT - CPR

ONTCPR

Ontario

vie. 7/11

1:34 pm-8:26 pm

1 stop5h 52m

$369

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Casper

What is the cheapest month to book a flight from Ontario to Casper?

Currently, January is the cheapest month in which you can book a flight from Ontario to Casper (average of $348). Flying from Ontario to Casper in June is currently the most expensive (average of $500). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Casper

Peruse reviews from past customers who have flown with United Airlines from Ontario to Casper to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,852 reviews

Reviews

1 / 20

10.0

Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.

United Airlines

7.4

Good

8,852 reviews

United Airlines

7.4

Good

8,852 reviews

Reviews

1 / 20

10.0

Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.

Related info for your journey

What is the cheapest airline to fly from Ontario to Casper round-trip?
Currently priced at $306, United Airlines will fly you from Ontario to Casper and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. United Airlines is priced at 25% lower than the current average price of a flight leaving 3 months from now.
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.
What is the cheapest month to book a flight from Ontario to Casper?
Currently, January is the cheapest month in which you can book a flight from Ontario to Casper (average of $348). Flying from Ontario to Casper in June is currently the most expensive (average of $500). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Ontario to Casper

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$297	Average$411	FlexibilityNo cancel fee	On-time69%

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$306+ Cheap flights from Ontario to Casper (ONT - CPR)

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 7/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Casper with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Casper

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Casper

Cheapest flights from Ontario to CasperExplore 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 30, 2025.

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 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Casper that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Casper

What is the cheapest month to book a flight from Ontario to Casper?

Reviews of airlines servicing Casper

Peruse reviews from past customers who have flown with United Airlines from Ontario to Casper to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

What is the cheapest airline to fly from Ontario to Casper round-trip?

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

How can I find direct flights from Ontario to Casper?

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

What is the cheapest month to book a flight from Ontario to Casper?

Traveling to a place near Ontario?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Casper

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Top airline flying from Ontario to Casper

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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 30, 2025.