How long is the flight from Casper to Ontario?

Airlines like United Airlines fly from Casper to Ontario in about 8h 15m. 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.

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.

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.

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.

$263+ Cheap Flights from Casper to Ontario

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Cheap flight deals from Casper to Ontario

Cheapest

Best

Last-minute

One-way

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 March 15, 2026.

Tue 4/283:14 pm

CPR

ONT

1 stop6h 22m

United Airlines

Sat 5/21:40 pm

ONT

CPR

1 stop7h 30m

United Airlines

Deal found 3/12

$368

Sat 4/113:14 pm

CPR

ONT

1 stop6h 22m

United Airlines

Mon 4/135:10 am

ONT

CPR

1 stop4h 37m

United Airlines

Deal found 3/11

$403

Sat 3/143:15 pm

CPR

ONT

1 stop6h 35m

United Airlines

Sat 3/215:15 am

ONT

CPR

1 stop6h 35m

United Airlines

Deal found 3/12

$591

Tue 3/249:00 am

CPR

ONT

1 stop4h 49m

United Airlines

Sun 3/295:10 am

ONT

CPR

1 stop4h 37m

United Airlines

Deal found 3/12

$673

Last-minute flights from Casper to Ontario
Discover last-minute flight deals from Casper to Ontario. Data last updated March 15, 2026 and is based on user searches.

Sat 3/143:15 pm

CPR

ONT

1 stop6h 35m

United Airlines

Sat 3/215:15 am

ONT

CPR

1 stop6h 35m

United Airlines

Deal found 3/12

$591

Tue 3/249:00 am

CPR

ONT

1 stop4h 49m

United Airlines

Sun 3/295:10 am

ONT

CPR

1 stop4h 37m

United Airlines

Deal found 3/12

$673

Sat 4/113:14 pm

CPR

ONT

1 stop6h 22m

United Airlines

Mon 4/135:10 am

ONT

CPR

1 stop4h 37m

United Airlines

Deal found 3/11

$403

Tue 4/283:14 pm

CPR

ONT

1 stop6h 22m

United Airlines

Sat 5/21:40 pm

ONT

CPR

1 stop7h 30m

United Airlines

Deal found 3/12

$368

Find flight deals from Casper to Ontario

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$368 (United Airlines)
One-way from	$263 (United Airlines)
Popular in	December
Cheapest in	April
Average price	$445

Provider with most accurate pricing for Casper Natrona County-Ontario flight deals.

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Provider most trusted by Cheapflights users for Casper Natrona County-Ontario flights.

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From Casper Natrona County to Ontario

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One-way flight from Casper Natrona County to Ontario

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Highest demand for flights based on searches. 19% potential increase in price ($91 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Tue 4/28

1:21 pm-8:36 pm

1 stop8h 15m

Ontario

Sat 5/2

1:40 pm-10:10 pm

1 stop7h 30m

$368

Cheapest one-way

Quickest one-way

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Mon 4/13

3:14 pm-8:36 pm

1 stop6h 22m

$263

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

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.

CPR-ONT

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

How long is the flight from Casper to Ontario?
Airlines like United Airlines fly from Casper to Ontario in about 8h 15m. 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.

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$263+ 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 4/13. 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

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Cheap 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 March 15, 2026.

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 March 15, 2026.

Best flights from Casper to OntarioDiscover carefully curated flight deals from Casper to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 15, 2026.

Discover carefully curated flight deals from Casper to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 15, 2026.

Last-minute flights from Casper to OntarioDiscover last-minute flight deals from Casper to Ontario. Data last updated March 15, 2026 and is based on user searches.

Discover last-minute flight deals from Casper to Ontario. Data last updated March 15, 2026 and is based on user searches.

One-way flights from Casper to OntarioSearch for one-way flight options from Casper to Ontario. Find affordable one-way fares based on user searches. Data last updated March 15, 2026.

Search for one-way flight options from Casper to Ontario. Find affordable one-way fares based on user searches. Data last updated March 15, 2026.

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

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.

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?

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?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Casper to Ontario

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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 March 15, 2026.

Casper and Ontario flights

Browse other Casper and Ontario flight options. Last updated on March 15, 2026.

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 March 15, 2026.

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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 March 15, 2026.

Best flights from Casper to Ontario
Discover carefully curated flight deals from Casper to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 15, 2026.

Last-minute flights from Casper to Ontario
Discover last-minute flight deals from Casper to Ontario. Data last updated March 15, 2026 and is based on user searches.

One-way flights from Casper to Ontario
Search for one-way flight options from Casper to Ontario. Find affordable one-way fares based on user searches. Data last updated March 15, 2026.