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).

What cabin classes can I book on flights from Casper to St. Louis?

Only Economy Class is available on flights from Casper to St. Louis.

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. Other layover airports each see under 5%.

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

Yes. Being flexible with your travel dates can save you up to 50% on the Casper to St. Louis route. 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 popular places can I visit in St. Louis?

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

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 showed a wide range, from about $388 to $1,037. That means the highest observed fare was about 3x higher than the lowest one.

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 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 starting from around $31 for economy cars. Top options include: · Hertz · Budget · Alamo · Enterprise Rent-A-Car · Payless

How much should I expect to pay for a Casper to St. Louis flight?

Round-trip flights from Casper to St. Louis range from $340 to $398, with an average of $398 over the past 12 months. Anything below $340 counts as a good deal.

What is the cheapest airline to fly from Casper to St. Louis?

United Airlines ($388) offered the cheapest round-trip ticket from Casper to St. Louis in the last 5 days.

What is the cheapest layover airport when flying from Casper to St. Louis?

Flights via Denver Intl (DEN) offer the most affordable fares, with an average round-trip price of $421. Based on KAYAK data over the past 3 months.

When flying from Casper to St. Louis which airport offers the shortest layover?

Denver Intl (DEN) had the shortest average connection time for Casper to St. Louis layovers at 226 minutes over the past 3 months.

$388 CHEAP FLIGHTS from Casper to St. Louis (CPR - STL)

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Cheapest round-trip

$388

Typical prices: $340-$398

United Airlines

Wed 10/31Sat 11/3

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.

Round-trip

One-way

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

Sat, Oct 31 - Tue, Nov 3

3:13 pm - 8:59 pmCPR Casper Natrona County-STL Lambert-St Louis

4h 46m1 stop Denver Intl

1:40 pm - 9:59 pmSTL Lambert-St Louis-CPR Casper Natrona County

9h 19m1 stop Denver Intl

$388United Airlines

Sat, Oct 31 - Tue, Nov 3

7:15 am - 3:43 pmCPR Casper Natrona County-STL Lambert-St Louis

7h 28m2 stops Denver Intl Chicago O'Hare Intl

1:40 pm - 5:17 pmSTL Lambert-St Louis-CPR Casper Natrona County

4h 37m1 stop Denver Intl

$394United Airlines

Fri, Dec 25 - Mon, Jan 4

3:18 pm - 9:08 pmCPR Casper Natrona County-STL Lambert-St Louis

4h 50m1 stop Denver Intl

6:09 pm - 9:59 pmSTL Lambert-St Louis-CPR Casper Natrona County

4h 50m1 stop Denver Intl

$408United Airlines

Fri, Dec 25 - Fri, Jan 1

11:33 am - 9:08 pmCPR Casper Natrona County-STL Lambert-St Louis

8h 35m1 stop Denver Intl

6:09 pm - 9:59 pmSTL Lambert-St Louis-CPR Casper Natrona County

4h 50m1 stop Denver Intl

$408United Airlines

Thu, Dec 24 - Tue, Jan 5

11:33 am - 9:08 pmCPR Casper Natrona County-STL Lambert-St Louis

8h 35m1 stop Denver Intl

9:13 am - 5:04 pmSTL Lambert-St Louis-CPR Casper Natrona County

8h 51m1 stop Denver Intl

$408United Airlines

Sat, Oct 31 - Tue, Nov 3

3:13 pm - 8:59 pmCPR Casper Natrona County-STL Lambert-St Louis

4h 46m1 stop Denver Intl

1:40 pm - 9:59 pmSTL Lambert-St Louis-CPR Casper Natrona County

9h 19m1 stop Denver Intl

$408United Airlines

Fri, Dec 25 - Tue, Jan 5

3:18 pm - 9:08 pmCPR Casper Natrona County-STL Lambert-St Louis

4h 50m1 stop Denver Intl

9:13 am - 5:04 pmSTL Lambert-St Louis-CPR Casper Natrona County

8h 51m1 stop Denver Intl

$408United Airlines

Thu, Dec 24 - Mon, Jan 4

11:33 am - 9:08 pmCPR Casper Natrona County-STL Lambert-St Louis

8h 35m1 stop Denver Intl

6:09 pm - 9:59 pmSTL Lambert-St Louis-CPR Casper Natrona County

4h 50m1 stop Denver Intl

$408United Airlines

Thu, Dec 24 - Fri, Jan 1

11:33 am - 9:08 pmCPR Casper Natrona County-STL Lambert-St Louis

8h 35m1 stop Denver Intl

6:09 pm - 9:59 pmSTL Lambert-St Louis-CPR Casper Natrona County

4h 50m1 stop Denver Intl

$408United 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 from Casper to St. Louis with more confidence.

Prices

Airlines

Layovers

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

Round-trip flights from Casper to St. Louis start at $388. Prices are typical for this route right now, with typical round-trip fares ranging from $340 to $398. The lowest price found in the past 5 days was $388 on United Airlines.

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Cheapest flight	$388

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.

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).
What cabin classes can I book on flights from Casper to St. Louis?
Only Economy Class is available on flights from Casper to St. Louis.
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. Other layover airports each see under 5%.
Can I save money by using flexible dates for flights from Casper to St. Louis?
Yes. Being flexible with your travel dates can save you up to 50% on the Casper to St. Louis route. 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 popular places can I visit in St. Louis?
Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.
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 showed a wide range, from about $388 to $1,037. That means the highest observed fare was about 3x higher than the lowest one.
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 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 starting from around $31 for economy cars. Top options include:
· Hertz
· Budget
· Alamo
· Enterprise Rent-A-Car
· Payless
How much should I expect to pay for a Casper to St. Louis flight?
Round-trip flights from Casper to St. Louis range from $340 to $398, with an average of $398 over the past 12 months. Anything below $340 counts as a good deal.

If your dates can be flexible, aim for a Friday departure instead of Tuesday. On this route, Friday flights average $340 - about $331 less than Tuesday (49% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Lambert-St Louis Airport.
- MainStay Suites St. Louis Airport
- Drury Inn & Suites St. Louis Airport
- Renaissance St. Louis Airport Hotel

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CPR - STL

$388 Find Cheap Flights from Casper to St. Louis - Compare and Save

Everything you should know

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

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

Recent one-way flight deals from Casper to St. Louis

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

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

What is the cheapest airline to fly from Casper to St. Louis?

What is the cheapest layover airport when flying from Casper to St. Louis?

When flying from Casper to St. Louis which airport offers the shortest layover?

Key details for Casper to St. Louis flights

Cheapest flight

When to book flights from Casper to St. Louis

Your Casper to St. Louis flight questions, answered

Your guide to booking Casper to St. Louis flights

More options for your flight from Casper to St. Louis

Complete your trip to St. Louis with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Casper to St. Louis

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