Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to Casper from $308

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Casper departing on 4/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Ontario to Casper

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:34 pm - 6:59 pm
ONT
-
CPR
4h 25m
1 stop
United Airlines Logo
3:14 pm - 8:36 pm
CPR
-
ONT
6h 22m
1 stop
$398United Airlines
Wed, Apr 22 - Sat, Apr 25
United Airlines Logo
1:34 pm - 6:59 pm
ONT
-
CPR
4h 25m
1 stop
United Airlines Logo
5:25 am - 5:47 pm
CPR
-
ONT
13h 22m
2 stops
$404United Airlines
Wed, Apr 22 - Sat, Apr 25
United Airlines Logo
11:05 am - 10:07 pm
ONT
-
CPR
10h 02m
2 stops
United Airlines Logo
1:21 pm - 8:36 pm
CPR
-
ONT
8h 15m
1 stop
$409United Airlines
Fri, Apr 10 - Mon, Apr 20
United Airlines Logo
5:00 am - 12:42 pm
ONT
-
CPR
6h 42m
1 stop
United Airlines Logo
7:05 am - 12:47 pm
CPR
-
ONT
6h 42m
1 stop
$439United Airlines
Thu, Jun 18 - Thu, Jun 25
United Airlines Logo
11:05 am - 8:26 pm
ONT
-
CPR
8h 21m
2 stops
United Airlines Logo
11:22 am - 10:45 pm
CPR
-
ONT
12h 23m
2 stops
$444United Airlines
Wed, Apr 22 - Sat, Apr 25
United Airlines Logo
1:43 pm - 8:26 pm
ONT
-
CPR
5h 43m
1 stop
United Airlines Logo
11:22 am - 10:45 pm
CPR
-
ONT
12h 23m
2 stops
$461United Airlines
Fri, Apr 17 - Fri, Apr 24
United Airlines Logo
1:43 pm - 6:59 pm
ONT
-
CPR
4h 16m
1 stop
United Airlines Logo
5:55 pm - 8:36 pm
CPR
-
ONT
27h 41m
1 stop
$491United Airlines
Fri, Apr 17 - Fri, Apr 24
United Airlines Logo
1:18 pm - 9:59 pm
ONT
-
CPR
7h 41m
1 stop
United Airlines Logo
9:26 am - 10:37 pm
CPR
-
ONT
14h 11m
2 stops
$514United Airlines
Thu, Jun 18 - Thu, Jun 25
United Airlines Logo
11:05 am - 10:07 pm
ONT
-
CPR
10h 02m
2 stops
United Airlines Logo
11:22 am - 10:45 pm
CPR
-
ONT
12h 23m
2 stops
$604United Airlines
Fri, Apr 17 - Fri, Apr 24
United Airlines Logo
5:10 am - 10:47 am
ONT
-
CPR
4h 37m
1 stop
United Airlines Logo
3:14 pm - 8:36 pm
CPR
-
ONT
6h 22m
1 stop
$626United Airlines
Thu, Apr 16 - Thu, Apr 16

United Airlines flights from Ontario to Casper

Our best United Airlines deals on Ontario to Casper flight tickets
United Airlines
Apr 22
ONT1:34 pmOntario
4h 25m
1 stop
CPR6:59 pmCasper Natrona County
Apr 25
CPR3:14 pmCasper Natrona County
6h 22m
1 stop
ONT8:36 pmOntario
$398
United Airlines
Mar 24
ONT5:15 amOntario
6h 35m
1 stop
CPR12:50 pmCasper Natrona County
Mar 28
CPR3:15 pmCasper Natrona County
6h 35m
1 stop
ONT8:50 pmOntario
$403
United Airlines
Apr 22
ONT1:34 pmOntario
4h 25m
1 stop
CPR6:59 pmCasper Natrona County
Apr 25
CPR5:25 amCasper Natrona County
13h 22m
2 stops
ONT5:47 pmOntario
$404

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Casper that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 23, 2026.
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

Cheapest round-trip
Quickest round-trip

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Wed 4/22

1:34 pm-6:59 pm

1 stop4h 25m

Casper Natrona County

Sat 4/25

3:14 pm-8:36 pm

1 stop6h 22m

$398

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Wed 4/22

1:34 pm-6:59 pm

1 stop4h 25m

Casper Natrona County

Sat 4/25

5:25 am-5:47 pm

2 stops13h 22m

$404

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Fri 4/10

11:05 am-10:07 pm

2 stops10h 02m

Casper Natrona County

Mon 4/20

1:21 pm-8:36 pm

1 stop8h 15m

$409

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Thu 6/18

5:00 am-12:42 pm

1 stop6h 42m

Casper Natrona County

Thu 6/25

7:05 am-12:47 pm

1 stop6h 42m

$439

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Wed 4/22

11:05 am-8:26 pm

2 stops8h 21m

Casper Natrona County

Sat 4/25

11:22 am-10:45 pm

2 stops12h 23m

$444

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Fri 4/17

1:43 pm-8:26 pm

1 stop5h 43m

Casper Natrona County

Fri 4/24

11:22 am-10:45 pm

2 stops12h 23m

$461

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Fri 4/17

1:43 pm-6:59 pm

1 stop4h 16m

Casper Natrona County

Fri 4/24

5:55 pm-8:36 pm

1 stop27h 41m

$491

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Thu 6/18

1:18 pm-9:59 pm

1 stop7h 41m

Casper Natrona County

Thu 6/25

9:26 am-10:37 pm

2 stops14h 11m

$514

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Fri 4/17

11:05 am-10:07 pm

2 stops10h 02m

Casper Natrona County

Fri 4/24

11:22 am-10:45 pm

2 stops12h 23m

$604

OntarioCasper

ONT - CPR

ONTCPR

Ontario

Thu 4/16

5:10 am-10:47 am

1 stop4h 37m

Casper Natrona County

Thu 4/16

3:14 pm-8:36 pm

1 stop6h 22m

$626

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

See travel insights to Casper from

How to get the cheapest flight ticket from Ontario to Casper

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Ontario to Casper Natrona County?

United Airlines is the most popular carrier operating from Ontario to Casper Natrona County

When to book flights from Ontario to Casper

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Casper according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Casper (ONT to CPR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Casper

Fastest flight time

4h 36m

Direct flights

None
The fastest flight from Ontario to Casper takes 4h 36m
There are no direct flights from Ontario to Casper. There are no popular flight routes from Ontario to Casper.
Search flight deals

  • How far is Ontario to Casper Natrona County by plane?

    The straight-line distance from Ontario to Casper Natrona County is 860.4 mi. In terms of flight time, this usually takes a little over 4h 36m.

  • When did momondo last update prices for flights from Ontario Airport to Casper Natrona County Airport?

    Prices for flights from Ontario Airport to Casper Natrona County Airport were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Casper Natrona County Airport?

  • How old do you have to be to fly from Ontario Airport to Casper Natrona County Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Casper Natrona County Airport.

  • What documentation or ID do you need to fly to Casper Natrona County Airport?

    The travel and health documents required for your trip to Casper Natrona County Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Casper Natrona County Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Ontario to Casper?

Best airlines flying from Ontario to Casper

Compare and see reviews for airlines that fly from Ontario to Casper with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $243Free CancellationRating
7.4
9,460 reviews
Search United Airlines flights

Traveling to a place near Casper?

Book flights to Casper if you plan to visit one of these locations
Rawlins
Evansville
Douglas

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Casper?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Casper for you.

Can I find flights from Ontario to Casper with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Casper flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Casper?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Casper.

I’m not ready to book a flight from Ontario to Casper right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Casper, momondo offers a useful price alert feature which will track prices for flights to Casper from Ontario and alert you when they change.

An easier way to manage your Casper trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 4/22
Wed 4/29
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States