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Cheap flights from Casper to Los Angeles from $398

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Casper to Los Angeles departing on 5/29. 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

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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
1:23 pm - 5:28 pm
CPR
-
ONT
5h 05m
1 stop
United Airlines Logo
1:18 pm - 8:33 pm
ONT
-
CPR
6h 15m
1 stop
$398United Airlines
Fri, May 29 - Thu, Jun 4
United Airlines Logo
11:21 am - 5:28 pm
CPR
-
ONT
7h 07m
1 stop
United Airlines Logo
6:30 pm - 8:26 pm
ONT
-
CPR
24h 56m
1 stop
$461United Airlines
Tue, May 26 - Fri, Jun 5
United Airlines Logo
9:26 am - 10:50 pm
CPR
-
ONT
14h 24m
2 stops
United Airlines Logo
6:30 pm - 7:15 pm
ONT
-
CPR
23h 45m
1 stop
$512United Airlines
Sat, May 30 - Fri, Jun 5
United Airlines Logo
6:13 pm - 8:42 pm
CPR
-
ONT
27h 29m
1 stop
United Airlines Logo
6:30 pm - 9:59 pm
ONT
-
CPR
26h 29m
1 stop
$514United Airlines
Mon, Jun 1 - Fri, Jun 5
United Airlines Logo
11:21 am - 12:12 pm
CPR
-
ONT
25h 51m
2 stops
United Airlines Logo
6:30 pm - 8:26 pm
ONT
-
CPR
24h 56m
1 stop
$536United Airlines
Tue, May 26 - Fri, Jun 5
United Airlines Logo
1:23 pm - 12:12 pm
CPR
-
ONT
23h 49m
2 stops
United Airlines Logo
6:30 pm - 8:51 am
ONT
-
CPR
13h 21m
1 stop
$551United Airlines
Wed, May 27 - Fri, Jun 5
United Airlines Logo
7:05 am - 10:37 pm
CPR
-
ONT
16h 32m
2 stops
United Airlines Logo
6:30 pm - 9:59 pm
ONT
-
CPR
26h 29m
1 stop
$552United Airlines
Thu, May 28 - Fri, Jun 5
United Airlines Logo
1:23 pm - 12:12 pm
CPR
-
ONT
23h 49m
2 stops
United Airlines Logo
6:30 pm - 7:15 pm
ONT
-
CPR
23h 45m
1 stop
$566United Airlines
Sun, May 31 - Fri, Jun 5
United Airlines Logo
8:45 am - 5:28 pm
CPR
-
ONT
9h 43m
1 stop
United Airlines Logo
6:30 pm - 8:51 am
ONT
-
CPR
13h 21m
1 stop
$575United Airlines
Sun, May 31 - Fri, Jun 5
United Airlines Logo
9:05 am - 12:38 pm
CPR
-
ONT
4h 33m
1 stop
United Airlines Logo
1:43 pm - 10:47 am
ONT
-
CPR
20h 04m
1 stop
$581United Airlines
Mon, Apr 20 - Fri, Apr 24

United Airlines flights from Casper to Ontario

Our best United Airlines deals on Casper to Ontario flight tickets
United Airlines
May 29
CPR1:23 pmCasper Natrona County
5h 05m
1 stop
ONT5:28 pmOntario
Jun 4
ONT1:18 pmOntario
6h 15m
1 stop
CPR8:33 pmCasper Natrona County
$398
United Airlines
May 26
CPR11:21 amCasper Natrona County
7h 07m
1 stop
ONT5:28 pmOntario
Jun 5
ONT6:30 pmOntario
24h 56m
1 stop
CPR8:26 pmCasper Natrona County
$461
United Airlines
May 30
CPR9:26 amCasper Natrona County
14h 24m
2 stops
ONT10:50 pmOntario
Jun 5
ONT6:30 pmOntario
23h 45m
1 stop
CPR7:15 pmCasper Natrona County
$512

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 April 6, 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

Cheapest round-trip
Quickest round-trip

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Fri 5/29

1:23 pm-5:28 pm

1 stop5h 05m

Ontario

Thu 6/4

1:18 pm-8:33 pm

1 stop6h 15m

$398

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Tue 5/26

11:21 am-5:28 pm

1 stop7h 07m

Ontario

Fri 6/5

6:30 pm-8:26 pm

1 stop24h 56m

$461

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Sat 5/30

9:26 am-10:50 pm

2 stops14h 24m

Ontario

Fri 6/5

6:30 pm-7:15 pm

1 stop23h 45m

$512

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Mon 6/1

6:13 pm-8:42 pm

1 stop27h 29m

Ontario

Fri 6/5

6:30 pm-9:59 pm

1 stop26h 29m

$514

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Tue 5/26

11:21 am-12:12 pm

2 stops25h 51m

Ontario

Fri 6/5

6:30 pm-8:26 pm

1 stop24h 56m

$536

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Wed 5/27

1:23 pm-12:12 pm

2 stops23h 49m

Ontario

Fri 6/5

6:30 pm-8:51 am

1 stop13h 21m

$551

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Thu 5/28

7:05 am-10:37 pm

2 stops16h 32m

Ontario

Fri 6/5

6:30 pm-9:59 pm

1 stop26h 29m

$552

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Sun 5/31

1:23 pm-12:12 pm

2 stops23h 49m

Ontario

Fri 6/5

6:30 pm-7:15 pm

1 stop23h 45m

$566

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Sun 5/31

8:45 am-5:28 pm

1 stop9h 43m

Ontario

Fri 6/5

6:30 pm-8:51 am

1 stop13h 21m

$575

CasperOntario

CPR - ONT

CPRONT

Casper Natrona County

Mon 4/20

9:05 am-12:38 pm

1 stop4h 33m

Ontario

Fri 4/24

1:43 pm-10:47 am

1 stop20h 04m

$581

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 33m

Direct flights

None
The fastest flight from Casper to Ontario takes 4h 33m
There are no direct flights from Casper to Ontario. There are no popular flight routes from Casper to Ontario.
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Frequently asked questions about flying from Casper to Ontario

  • 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 33m 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.

Frequently asked questions about flying from Casper to Ontario

  • How do I get Price Alerts for flights from Casper to Ontario?

    Price Alerts will notify you by email when the price for flights to Ontario from Casper decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Casper to Ontario with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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.

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