When did momondo last update prices for flights from Lambert-St Louis Airport to Casper Natrona County Airport?

Prices for flights from Lambert-St Louis Airport to Casper Natrona County Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Lambert-St Louis Airport to Casper Natrona County Airport?

As of September 2025, there is 1 operator available to choose from for flights from Lambert-St Louis Airport to Casper Natrona County Airport.

How old do you have to be to fly from Lambert-St Louis Airport to Casper Natrona County Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Casper Natrona County Airport.

What documentation or ID do you need to fly to Casper Natrona County Airport?

The travel and health documents required for your trip to Casper Natrona County 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 Casper Natrona County Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$252 Cheap Flights from St. Louis to Casper in 2025

Q: What is the typical price of a round-trip flight between St. Louis and Casper?

Prices are currently typical for flights on this route. Typical prices usually range from $248 to $308. The lowest price recently found on this route was $256.

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0 bags

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Find the cheapest flights from St. Louis to Casper

Round-trip

One-way

Last minute

Cheap round-trip flights

4:50 pm - 10:12 pmSTL-CPR

6h 22m1 stop

3:12 pm - 8:46 pmCPR-STL

4h 34m1 stop

$256United Airlines

Find Deal

Thu, Sep 25 - Thu, Oct 2

4:50 pm - 10:12 pmSTL-CPR

6h 22m1 stop

7:00 am - 6:57 pmCPR-STL

10h 57m2 stops

$331United Airlines

Find Deal

Thu, Sep 25 - Thu, Oct 2

5:15 am - 12:42 pmSTL-CPR

8h 27m1 stop

5:50 pm - 11:53 pmCPR-STL

5h 03m1 stop

$343United Airlines

Find Deal

Thu, Sep 18 - Mon, Sep 22

5:15 am - 10:47 amSTL-CPR

6h 32m1 stop

7:00 am - 4:32 pmCPR-STL

8h 32m1 stop

$368United Airlines

Find Deal

Sun, Oct 5 - Sat, Oct 11

5:15 am - 12:42 pmSTL-CPR

8h 27m1 stop

5:50 pm - 10:46 amCPR-STL

15h 56m2 stops

$374United Airlines

Find Deal

Thu, Sep 18 - Mon, Sep 22

5:15 am - 10:47 amSTL-CPR

6h 32m1 stop

8:55 am - 10:35 pmCPR-STL

12h 40m2 stops

$414United Airlines

Find Deal

Sun, Oct 5 - Sat, Oct 11

5:00 am - 10:47 amSTL-CPR

6h 47m2 stops

7:00 am - 6:57 pmCPR-STL

10h 57m2 stops

$440United Airlines

Find Deal

Thu, Sep 25 - Thu, Oct 2

6:35 am - 7:09 pmSTL-CPR

13h 34m2 stops

5:50 pm - 10:46 amCPR-STL

15h 56m2 stops

$459United Airlines

Find Deal

Thu, Sep 18 - Mon, Sep 22

United Airlines flights from St. Louis to Casper

Our best United Airlines deals on St. Louis to Casper flight tickets

United Airlines

Sep 25

STL4:50 pmLambert-St Louis

6h 22m

1 stop

CPR10:12 pmCasper Natrona County

Oct 2

CPR3:12 pmCasper Natrona County

4h 34m

1 stop

STL8:46 pmLambert-St Louis

$256

Find similar

United Airlines

Sep 25

STL4:50 pmLambert-St Louis

6h 22m

1 stop

CPR10:12 pmCasper Natrona County

Oct 2

CPR7:00 amCasper Natrona County

10h 57m

2 stops

STL6:57 pmLambert-St Louis

$331

Find similar

United Airlines

Sep 18

STL5:15 amLambert-St Louis

8h 27m

1 stop

CPR12:42 pmCasper Natrona County

Sep 22

CPR5:50 pmCasper Natrona County

5h 03m

1 stop

STL11:53 pmLambert-St Louis

$343

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Thu 9/25

4:50 pm-10:12 pm

1 stop6h 22m

Casper Natrona County

Thu 10/2

3:12 pm-8:46 pm

1 stop4h 34m

$256

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Thu 9/25

4:50 pm-10:12 pm

1 stop6h 22m

Casper Natrona County

Thu 10/2

7:00 am-6:57 pm

2 stops10h 57m

$331

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Thu 9/18

5:15 am-12:42 pm

1 stop8h 27m

Casper Natrona County

Mon 9/22

5:50 pm-11:53 pm

1 stop5h 03m

$343

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Sun 10/5

5:15 am-10:47 am

1 stop6h 32m

Casper Natrona County

Sat 10/11

7:00 am-4:32 pm

1 stop8h 32m

$368

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Thu 9/18

5:15 am-12:42 pm

1 stop8h 27m

Casper Natrona County

Mon 9/22

5:50 pm-10:46 am

2 stops15h 56m

$374

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Sun 10/5

5:15 am-10:47 am

1 stop6h 32m

Casper Natrona County

Sat 10/11

8:55 am-10:35 pm

2 stops12h 40m

$414

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Thu 9/25

5:00 am-10:47 am

2 stops6h 47m

Casper Natrona County

Thu 10/2

7:00 am-6:57 pm

2 stops10h 57m

$440

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Thu 9/18

6:35 am-7:09 pm

2 stops13h 34m

Casper Natrona County

Mon 9/22

5:50 pm-10:46 am

2 stops15h 56m

$459

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Casper

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Casper?

What is the cheapest day to depart on your flight to Casper?

The cheapest day to depart from St. Louis to Casper is on a Saturday when prices can be found for as low as $333. The most expensive day to fly to Casper is Tuesday, with ticket prices averaging around $1,086.

What is the cheapest time of day to depart on your flight to Casper?

The cheapest time of day to fly to Casper is at noon when flights can be purchased for as low as $353. Flights to Casper are more costly in the afternoon, with an average ticket price of $435. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from St. Louis to Casper

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Casper according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Casper (STL to CPR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Casper

Direct flights	None

There are no direct flights from St. Louis to Casper. There are no popular flight routes from St. Louis to Casper.

Search flight deals

How far is Lambert-St Louis to Casper Natrona County by plane?
Casper Natrona County is 891.0 mi away from Lambert-St Louis. 6h 22m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Casper Natrona County Airport?
Prices for flights from Lambert-St Louis Airport to Casper Natrona County Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Casper Natrona County Airport?
As of September 2025, there is 1 operator available to choose from for flights from Lambert-St Louis Airport to Casper Natrona County Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Casper Natrona County Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Casper Natrona County Airport.
What documentation or ID do you need to fly to Casper Natrona County Airport?
The travel and health documents required for your trip to Casper Natrona County 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 Casper Natrona County Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from St. Louis to Casper?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Casper is United Airlines, representing 100% of all bookings.

Best airlines flying from St. Louis to Casper

Compare and see reviews for airlines that fly from St. Louis to Casper with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $238	Free Cancellation	Rating 7.4 8,939 reviews		Search United Airlines flights

Rawlins

Evansville

Douglas

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Finding the right flight to Casper from St. Louis 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 Casper quick and easy, saving you time and money.

Can I find flights from St. Louis to Casper with flexible booking policies on momondo?

momondo does allow users to show only those flights to Casper from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Casper?

momondo helps you find the best flight between St. Louis and Casper by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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