ONT - CPR

$258 Find Cheap Flights from Ontario to Casper

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Casper departing on 4/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Casper

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Casper, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Casper, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$258
United Airlines
Tue 4/28Tue 5/5
ONT - CPR • 1 stop
Cheapest one-way
$326
United Airlines
Sun 3/1
ONT - CPR • 1 stop
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We hope you love your trip to Casper!
Flight Deals
Useful Info
Flight Deals

Cheap Flights from Ontario to Casper (ONT-CPR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Casper that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Casper

Tue, Apr 28 - Tue, May 5
United Airlines Logo
1:34 pm - 10:07 pm
ONT
-
CPR
7h 33m
1 stop
United Airlines Logo
3:14 pm - 8:36 pm
CPR
-
ONT
6h 22m
1 stop
$258United Airlines
Tue, Apr 28 - Tue, May 5
United Airlines Logo
1:34 pm - 10:07 pm
ONT
-
CPR
7h 33m
1 stop
United Airlines Logo
1:17 pm - 10:59 pm
CPR
-
ONT
10h 42m
2 stops
$264United Airlines
Tue, Apr 28 - Tue, May 5
United Airlines Logo
11:05 am - 8:26 pm
ONT
-
CPR
8h 21m
2 stops
United Airlines Logo
3:14 pm - 10:59 pm
CPR
-
ONT
8h 45m
2 stops
$289United Airlines
Tue, Jul 28 - Tue, Aug 4
United Airlines Logo
5:00 am - 10:44 am
ONT
-
CPR
4h 44m
1 stop
United Airlines Logo
9:26 am - 10:34 pm
CPR
-
ONT
14h 08m
2 stops
$334United Airlines
Tue, May 26 - Wed, Jun 10
United Airlines Logo
5:00 am - 10:44 am
ONT
-
CPR
4h 44m
1 stop
United Airlines Logo
5:20 am - 12:20 pm
CPR
-
ONT
8h 00m
2 stops
$397United Airlines
Sun, Mar 1 - Fri, Mar 6
United Airlines Logo
5:00 am - 10:51 am
ONT
-
CPR
4h 51m
1 stop
United Airlines Logo
1:25 pm - 12:48 pm
CPR
-
ONT
24h 23m
1 stop
$409United Airlines
Tue, May 26 - Wed, Jun 10
United Airlines Logo
5:00 am - 10:44 am
ONT
-
CPR
4h 44m
1 stop
United Airlines Logo
5:20 am - 12:32 pm
CPR
-
ONT
8h 12m
1 stop
$477United Airlines
Fri, Mar 13 - Fri, Mar 20
United Airlines Logo
6:15 am - 8:36 pm
ONT
-
CPR
13h 21m
2 stops
United Airlines Logo
1:25 pm - 8:50 pm
CPR
-
ONT
8h 25m
1 stop
$495United Airlines
Tue, Mar 17 - Thu, Mar 19
United Airlines Logo
5:15 am - 2:40 pm
ONT
-
CPR
8h 25m
1 stop
United Airlines Logo
1:25 pm - 8:50 pm
CPR
-
ONT
8h 25m
1 stop
$556United Airlines
Tue, Mar 17 - Thu, Mar 19
United Airlines Logo
6:15 am - 5:02 pm
ONT
-
CPR
9h 47m
2 stops
United Airlines Logo
1:25 pm - 8:50 pm
CPR
-
ONT
8h 25m
1 stop
$562United Airlines
Useful Info

Good to know

Cheapest flight$258
Flight from Ontario to Casper

When to book flights from Ontario to Casper

Are your dates flexible? Find out the best times to travel from Ontario to Casper based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Casper

  • What is the cheapest flight from Ontario to Casper?

    In the last 3 days, the lowest price for a flight from Ontario to Casper was $326 for a one-way ticket and $258 for a round-trip.

  • Do I need a passport to fly between Ontario and Casper?

    No, a passport isn't needed to fly from Ontario to Casper. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Ontario to Casper?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Casper?

    Star Alliance is the only airline alliance operating flights between Ontario and Casper.

  • How does KAYAK find such low prices on flights from Ontario to Casper?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Casper.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Casper?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Casper from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Casper?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Casper with an airline and back to Ontario with another airline. Booking your flights between Ontario and CPR can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Casper?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Casper from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Casper

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Casper. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Casper? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9296 reviews
7.3Comfort
7.7Boarding
8.1Crew
6.6Food
7.1Entertainment
Airline reviews

Very disappointing given gate agent behavior. Filed a formal complaint with United.

2.0 MediocreAnnie Caroline, Feb 2026
SFO - LAX
Read more United Airlines reviews

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

The flight crew where really good. Better then the crew from BNE to SFO

left on time, reasonable boarding process arrived early luggage came out quickly

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

Everything you need to know for your flight from Ontario to Casper

Information on your arrival and departure airports