Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Casper to Los Angeles from $278

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Casper to Los Angeles departing on 2/26. 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
0 bags

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 Casper to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:21 pm - 8:36 pm
CPR
-
ONT
8h 15m
1 stop
United Airlines Logo
5:10 am - 10:47 am
ONT
-
CPR
4h 37m
1 stop
$409United Airlines
Thu, Apr 23 - Sat, Apr 25
United Airlines Logo
9:00 am - 12:48 pm
CPR
-
ONT
4h 48m
1 stop
United Airlines Logo
1:50 pm - 9:59 pm
ONT
-
CPR
7h 09m
1 stop
$414United Airlines
Fri, Mar 13 - Mon, Mar 16
United Airlines Logo
3:14 pm - 8:36 pm
CPR
-
ONT
6h 22m
1 stop
United Airlines Logo
5:00 am - 10:48 am
ONT
-
CPR
4h 48m
1 stop
$508United Airlines
Fri, May 15 - Mon, May 18
United Airlines Logo
1:17 pm - 8:36 pm
CPR
-
ONT
8h 19m
1 stop
United Airlines Logo
5:00 am - 10:48 am
ONT
-
CPR
4h 48m
1 stop
$523United Airlines
Fri, May 15 - Mon, May 18
United Airlines Logo
7:10 am - 10:59 pm
CPR
-
ONT
16h 49m
2 stops
United Airlines Logo
5:00 am - 10:48 am
ONT
-
CPR
4h 48m
1 stop
$528United Airlines
Fri, May 15 - Mon, May 18
United Airlines Logo
5:25 am - 12:38 pm
CPR
-
ONT
8h 13m
1 stop
United Airlines Logo
6:59 pm - 8:17 pm
ONT
-
CPR
24h 18m
2 stops
$561United Airlines
Fri, May 15 - Mon, May 18
United Airlines Logo
7:10 am - 10:59 pm
CPR
-
ONT
16h 49m
2 stops
United Airlines Logo
6:59 pm - 8:17 pm
ONT
-
CPR
24h 18m
2 stops
$566United Airlines
Fri, May 15 - Mon, May 18
United Airlines Logo
11:23 am - 10:59 pm
CPR
-
ONT
12h 36m
2 stops
United Airlines Logo
5:00 am - 10:48 am
ONT
-
CPR
4h 48m
1 stop
$576United Airlines
Fri, May 15 - Mon, May 18
United Airlines Logo
1:25 pm - 8:50 pm
CPR
-
ONT
8h 25m
1 stop
United Airlines Logo
6:37 pm - 2:40 pm
ONT
-
CPR
19h 03m
2 stops
$597United Airlines
Fri, Mar 13 - Mon, Mar 16
United Airlines Logo
11:23 am - 9:41 am
CPR
-
ONT
23h 18m
2 stops
United Airlines Logo
6:59 pm - 8:17 pm
ONT
-
CPR
24h 18m
2 stops
$605United Airlines
Fri, May 15 - Mon, May 18

United Airlines flights from Casper to Ontario

Our best United Airlines deals on Casper to Ontario flight tickets
United Airlines
Apr 23
CPR1:21 pmCasper Natrona County
8h 15m
1 stop
ONT8:36 pmOntario
Apr 25
ONT5:10 amOntario
4h 37m
1 stop
CPR10:47 amCasper Natrona County
$409
United Airlines
Mar 13
CPR9:00 amCasper Natrona County
4h 48m
1 stop
ONT12:48 pmOntario
Mar 16
ONT1:50 pmOntario
7h 09m
1 stop
CPR9:59 pmCasper Natrona County
$414
United Airlines
May 15
CPR3:14 pmCasper Natrona County
6h 22m
1 stop
ONT8:36 pmOntario
May 18
ONT5:00 amOntario
4h 48m
1 stop
CPR10:48 amCasper Natrona County
$508

momondo Fare Finder

 
Customize your flight search to find flights from Casper to Ontario 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 February 5, 2026.
Use the filters below to find and compare flights from Casper to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Thu 4/23

1:21 pm-8:36 pm

1 stop8h 15m

Ontario

Sat 4/25

5:10 am-10:47 am

1 stop4h 37m

$409

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 3/13

9:00 am-12:48 pm

1 stop4h 48m

Ontario

Mon 3/16

1:50 pm-9:59 pm

1 stop7h 09m

$414

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 5/15

3:14 pm-8:36 pm

1 stop6h 22m

Ontario

Mon 5/18

5:00 am-10:48 am

1 stop4h 48m

$508

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 5/15

1:17 pm-8:36 pm

1 stop8h 19m

Ontario

Mon 5/18

5:00 am-10:48 am

1 stop4h 48m

$523

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 5/15

7:10 am-10:59 pm

2 stops16h 49m

Ontario

Mon 5/18

5:00 am-10:48 am

1 stop4h 48m

$528

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 5/15

5:25 am-12:38 pm

1 stop8h 13m

Ontario

Mon 5/18

6:59 pm-8:17 pm

2 stops24h 18m

$561

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 5/15

7:10 am-10:59 pm

2 stops16h 49m

Ontario

Mon 5/18

6:59 pm-8:17 pm

2 stops24h 18m

$566

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 5/15

11:23 am-10:59 pm

2 stops12h 36m

Ontario

Mon 5/18

5:00 am-10:48 am

1 stop4h 48m

$576

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 3/13

1:25 pm-8:50 pm

1 stop8h 25m

Ontario

Mon 3/16

6:37 pm-2:40 pm

2 stops19h 03m

$597

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 5/15

11:23 am-9:41 am

2 stops23h 18m

Ontario

Mon 5/18

6:59 pm-8:17 pm

2 stops24h 18m

$605

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

See travel insights to Los Angeles from

How to get the cheapest flight ticket from Casper to Ontario

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 Casper Natrona County to Ontario?

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

When to book flights from Casper to Ontario

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

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

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

Fastest flight time

4h 47m

Direct flights

None
The fastest flight from Casper to Ontario takes 4h 47m
There are no direct flights from Casper to Ontario. There are no popular flight routes from Casper to Ontario.
Search flight deals

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

    Ontario is 860.4 mi away from Casper Natrona County. Typically, this will take 4h 47m by plane in normal conditions.

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

    Prices for flights from Casper Natrona County Airport to Ontario Airport refresh daily.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Casper Natrona County Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The travel and health documents required for your trip to Ontario 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 Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

Finding the right flight to Ontario from Casper is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

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

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

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

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 Casper to Ontario.

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

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

An easier way to manage your Ontario 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
Sat 3/7
Sat 3/14
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States