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

Currently, August is the cheapest month in which you can book a flight from Casper to Ontario (average of $246). Flying from Casper to Ontario in March is currently the most expensive (average of $327). 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.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Casper to Ontario as you normally would.

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.

$328+ Flights from Casper to Ontario

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Find 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 September 17, 2025.

Thu 9/181:37 pmCPR - ONT

1 stop4h 52mUnited Airlines

Sun 9/215:10 amONT - CPR

1 stop4h 40mUnited Airlines

Deal found 9/15

$328

Last-minute flights from Casper to Ontario
Discover last-minute flight deals from Casper to Ontario. Data last updated September 17, 2025 and is based on user searches.

Thu 9/181:37 pmCPR - ONT

1 stop4h 52mUnited Airlines

Sun 9/215:10 amONT - CPR

1 stop4h 40mUnited Airlines

Deal found 9/15

$328

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.

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown United Airlines from Casper to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,926 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

United Airlines

7.4

Good

8,926 reviews

United Airlines

7.4

Good

8,926 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

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.
What is the cheapest month to book a flight from Casper to Ontario?
Currently, August is the cheapest month in which you can book a flight from Casper to Ontario (average of $246). Flying from Casper to Ontario in March is currently the most expensive (average of $327). 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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Other flights to Ontario

Top airline flying from Casper to Ontario

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$199	Average$418	FlexibilityNo cancel fee	On-time69%

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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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Casper to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find 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 September 17, 2025.

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 September 17, 2025.

Last-minute flights from Casper to Ontario
Discover last-minute flight deals from Casper to Ontario. Data last updated September 17, 2025 and is based on user searches.

Discover last-minute flight deals from Casper to Ontario. Data last updated September 17, 2025 and is based on user searches.

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.

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown United Airlines from Casper to Ontario. Users can see the overall rating for each airline as well as how each is rated 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 Casper to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

How can I find direct flights from Casper to Ontario?

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

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

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 Casper to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Casper to Ontario by cabin class

Find flights from Casper to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Ontario

Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 17, 2025.

Casper and Ontario flights

Browse other Casper and Ontario flight options. Last updated on September 17, 2025.

Other flights from Casper

Browse through other flights departing from Casper. Flights are based on user searches made on Cheapflights and were last updated on September 17, 2025.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2025

Top airline flying from Casper to Ontario

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Book with Flexibility

Travel Smart

$328+ 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Casper to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Casper to Ontario

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 September 17, 2025.

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 September 17, 2025.

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.

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown United Airlines from Casper to Ontario. Users can see the overall rating for each airline as well as how each is rated 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 Casper to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

How can I find direct flights from Casper to Ontario?

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

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

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 Casper to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Casper to Ontario

100% Free

Book with Flexibility

Travel Smart

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 September 17, 2025.