CPR - STL

$433 Find Cheap Flights from Casper to St. Louis - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$448
Typical prices: $340-$592
United Airlines
Wed 11/14Sat 11/17
CPR - STL • 1 stop
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Flight Deals

Cheap Flights from Casper to St. Louis (CPR-STL)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
11:24 am - 8:59 pmCPR  Casper Natrona County-STL Lambert-St Louis
8h 35m1 stop Denver Intl
United Airlines Logo
8:50 am - 5:17 pmSTL  Lambert-St Louis-CPR Casper Natrona County
9h 27m1 stop Denver Intl
$448United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
1:29 pm - 11:24 pmCPR  Casper Natrona County-STL Lambert-St Louis
8h 55m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
8:50 am - 12:48 pmSTL  Lambert-St Louis-CPR Casper Natrona County
4h 58m1 stop Denver Intl
$454United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
11:24 am - 8:59 pmCPR  Casper Natrona County-STL Lambert-St Louis
8h 35m1 stop Denver Intl
United Airlines Logo
8:50 am - 5:17 pmSTL  Lambert-St Louis-CPR Casper Natrona County
9h 27m1 stop Denver Intl
$463United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
5:15 am - 12:38 pmCPR  Casper Natrona County-STL Lambert-St Louis
6h 23m1 stop Denver Intl
United Airlines Logo
4:39 pm - 8:32 pmSTL  Lambert-St Louis-CPR Casper Natrona County
4h 53m1 stop Denver Intl
$463United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
1:29 pm - 11:24 pmCPR  Casper Natrona County-STL Lambert-St Louis
8h 55m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
8:50 am - 12:48 pmSTL  Lambert-St Louis-CPR Casper Natrona County
4h 58m1 stop Denver Intl
$469United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
11:24 am - 8:59 pmCPR  Casper Natrona County-STL Lambert-St Louis
8h 35m1 stop Denver Intl
United Airlines Logo
8:50 am - 5:17 pmSTL  Lambert-St Louis-CPR Casper Natrona County
9h 27m1 stop Denver Intl
$478United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
1:29 pm - 11:24 pmCPR  Casper Natrona County-STL Lambert-St Louis
8h 55m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
8:50 am - 12:48 pmSTL  Lambert-St Louis-CPR Casper Natrona County
4h 58m1 stop Denver Intl
$484United Airlines
Booking Insights

Price, demand and travel trends for Casper to St. Louis flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Casper to St. Louis?

Round-trip flights from Casper to St. Louis typically range from $340 to $592. The lowest price found in the past 5 days was $448, on United Airlines.

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Key details for Casper to St. Louis flights

Cheapest flight

$448
Round-trip 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

Your Casper to St. Louis flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

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

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • Have flight prices from Casper to St. Louis changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route varied from about $448 to $768. That means the highest observed fare was about 71% higher than the lowest one.

  • What car rental options are available at Lambert-St Louis Airport (STL)?

    Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates averaging $78 for economy cars. Top options include:

    • Hertz
    • Budget
    • Alamo
    • Enterprise Rent-A-Car
    • Payless

  • Which airports can I use when flying from Casper to St. Louis?

    Flights from Casper to St. Louis usually depart from Casper Natrona County (CPR) and arrive at Lambert-St Louis (STL).

  • Which airports do connecting flights from Casper to St. Louis pass through?

    Most connecting flights from Casper to St. Louis pass through Denver Intl (DEN), which handles 100% of one-stop traffic on this route.

  • Can I save money by using flexible dates for flights from Casper to St. Louis?

    Yes. Flexible dates can save you up to 50% on flights from Casper to St. Louis. Friday is the cheapest departure day at $340 round-trip on average, while Tuesday is the most expensive at $671, a difference of $331.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What is the time difference between Casper and St. Louis?

    St. Louis is 1 hour ahead of Casper (Central Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in St. Louis?

    Some of the most popular sights in St. Louis are Busch Stadium, Enterprise Center and America's Center Convention Complex. These are among the most viewed places in St. Louis on KAYAK.

Your guide to booking Casper to St. Louis flights

Get tips on when to book, when to fly and what to know before your trip.

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