CPR - STL

$405 Find Cheap Flights from Casper to St. Louis

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Casper to St. Louis departing on 6/17. 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

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Casper to St. Louis, 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 Casper to St. Louis, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Casper to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Casper to St. Louis 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.

Recent round-trip flight deals from Casper to St. Louis

KAYAK's recommended round-trip deals from the most popular airlines that fly from Casper to St. Louis.
Discover the best prices for you by selecting your travel dates on KAYAK.
United Airlines Logo
3:11 pm - 11:59 pmCPR-STL
7h 48m1 stop
United Airlines Logo
4:32 pm - 9:39 amSTL-CPR
18h 07m1 stop
$405United Airlines
Find Deal
Tue, Jun 17 - Fri, Jun 20
United Airlines Logo
11:33 am - 8:48 pmCPR-STL
8h 15m1 stop
United Airlines Logo
5:27 pm - 9:39 amSTL-CPR
17h 12m2 stops
$410United Airlines
Find Deal
Tue, Jun 17 - Fri, Jun 20
United Airlines Logo
5:30 am - 3:30 pmCPR-STL
9h 00m2 stops
United Airlines Logo
8:10 am - 4:52 pmSTL-CPR
9h 42m2 stops
$509United Airlines
Find Deal
Tue, Jun 17 - Fri, Jun 20
Useful Info

KAYAK's insights & trends for Casper to St. Louis flights

Get data-powered insights and trends into flights from Casper to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Casper to St. Louis?

The average price of all round-trip flights from Casper to St. Louis clicked on KAYAK for each day over the last 12 months.

For Casper to St. Louis, Thursday is the cheapest day to fly on average and Saturday is the most expensive. Flying from St. Louis back to Casper, the best deals are generally found on Saturday, with Tuesday being the most expensive.

Find deals

Good to know

Low seasonAugust
High seasonDecember
Cheapest flight$405
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly with an average 35% increase in price.
Flight from Casper to St. Louis

When to book flights from Casper to St. Louis

Are your dates flexible? Find out the best times to travel from Casper to St. Louis 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 Casper to St. Louis

  • What is the cheapest flight from Casper to St. Louis?

    In the last 3 days, the lowest price for a flight from Casper to St. Louis was $405 for a round-trip ticket.

  • Do I need a passport to fly between Casper and St. Louis?

    A passport is not required to fly from Casper to St. Louis.

  • Which airports will I be using when flying from Casper to St. Louis?

    Casper and St. Louis are both served by 1 main airport. You will leave Casper from Casper Natrona County and will be arriving at Lambert-St Louis.

  • Which aircraft models fly most regularly from Casper to St. Louis?

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

  • Which airline alliances offer flights from Casper to St. Louis?

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

  • How does KAYAK find such low prices on flights from Casper to St. Louis?

    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 Casper to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Casper 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 Casper to St. Louis?

    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 St. Louis with an airline and back to Casper with another airline. Booking your flights between Casper and STL 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 Casper to St. Louis?

    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 St. Louis from Casper up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from Casper to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Casper to St. Louis. 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 Casper to St. Louis? 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 8696 reviews
6.6Food
7.7Boarding
8.1Crew
7.3Comfort
7.1Entertainment
Airline reviews

A bit rush for transit. Food and entertainment are not available

8.0 ExcellentAnonymous, Apr 2025ORD - SFO
Read more United Airlines reviews

A bit rush for transit. Food and entertainment are not available

Multiple delays and not straight answer from the United team

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

leg space better than expected. two washrooms for one plane isn't enough.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Everything you need to know for your flight from Casper to St. Louis

Information on your arrival and departure airports

St. Louis (STL)
Casper (CPR)

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