How long is the flight from Casper to Ontario?

Airlines like United Airlines fly from Casper to Ontario in about 7h 52m. 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Casper-Ontario flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

$308+ 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 November 17, 2025.

Tue 12/99:03 amCPR - ONT

1 stop4h 29mUnited Airlines

Sat 12/135:05 amONT - CPR

1 stop8h 33mUnited Airlines

Deal found 11/16

$308

Sun 12/71:30 pmCPR - ONT

1 stop8h 12mUnited Airlines

Sat 12/135:05 amONT - CPR

1 stop8h 33mUnited Airlines

Deal found 11/16

$324

Mon 12/11:25 pmCPR - ONT

1 stop8h 19mUnited Airlines

Fri 12/51:50 pmONT - CPR

2 stops21h 41mUnited Airlines

Deal found 11/16

$619

Wed 11/199:03 amCPR - ONT

1 stop4h 28mUnited Airlines

Fri 11/215:05 amONT - CPR

1 stop4h 40mUnited Airlines

Deal found 11/15

$918

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 November 17, 2025.

Sat 5/21:25 pmCPR - ONT

1 stop7h 52mUnited Airlines

Wed 5/65:00 amONT - CPR

1 stop8h 40mUnited Airlines

Deal found 11/14

$308

Tue 12/93:17 pmCPR - ONT

1 stop6h 25mUnited Airlines

Sat 12/135:05 amONT - CPR

1 stop8h 33mUnited Airlines

Deal found 11/15

$308

Sun 12/71:30 pmCPR - ONT

1 stop8h 12mUnited Airlines

Sat 12/135:05 amONT - CPR

1 stop8h 33mUnited Airlines

Deal found 11/16

$324

Mon 12/11:25 pmCPR - ONT

1 stop8h 19mUnited Airlines

Fri 12/51:50 pmONT - CPR

2 stops21h 41mUnited Airlines

Deal found 11/16

$619

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

Wed 11/199:03 amCPR - ONT

1 stop4h 28mUnited Airlines

Fri 11/215:05 amONT - CPR

1 stop4h 40mUnited Airlines

Deal found 11/15

$918

Mon 12/11:25 pmCPR - ONT

1 stop8h 19mUnited Airlines

Fri 12/51:50 pmONT - CPR

2 stops21h 41mUnited Airlines

Deal found 11/16

$619

Sun 12/71:30 pmCPR - ONT

1 stop8h 12mUnited Airlines

Sat 12/135:05 amONT - CPR

1 stop8h 33mUnited Airlines

Deal found 11/16

$324

Tue 12/99:03 amCPR - ONT

1 stop4h 29mUnited Airlines

Sat 12/135:05 amONT - CPR

1 stop8h 33mUnited Airlines

Deal found 11/16

$308

Cheap flight deals from Casper to Ontario

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$308 (United Airlines)
Popular in	December
Cheapest in	August
Average price	$448

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

Search Deals

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

Search Deals

From Casper Natrona County to Ontario

Search Deals

Highest demand for flights based on searches. 18% potential increase in price ($85 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in November 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Sat 5/2

1:25 pm-8:17 pm

1 stop7h 52m

Ontario

Wed 5/6

5:00 am-2:40 pm

1 stop8h 40m

$308

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Tue 12/9

3:17 pm-8:42 pm

1 stop6h 25m

Ontario

Sat 12/13

5:05 am-2:38 pm

1 stop8h 33m

$308

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Sun 12/7

1:30 pm-8:42 pm

1 stop8h 12m

Ontario

Sat 12/13

5:05 am-2:38 pm

1 stop8h 33m

$324

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Mon 12/1

1:25 pm-8:44 pm

1 stop8h 19m

Ontario

Fri 12/5

1:50 pm-12:31 pm

2 stops21h 41m

$619

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/14

Compare providers for flights from Casper to Ontario

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Casper to Ontario in November.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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 Casper-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Casper-Ontario flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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

9,013 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

9,013 reviews

United Airlines

7.4

Good

9,013 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

How long is the flight from Casper to Ontario?
Airlines like United Airlines fly from Casper to Ontario in about 7h 52m. 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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$403	FlexibilityNo cancel fee	On-time69%

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$308+ 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 12/9. 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 November 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 November 17, 2025.

Cheap flight deals from Casper to Ontario

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

Compare providers for flights from Casper to Ontario

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 Casper to Ontario in November.

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.

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

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 November 17, 2025.