Cheap flights from St. Louis to Casper (STL - CPR) from $315

This is the cheapest one-way flight price, found on 9/24. Prices may vary by date and flight preferences.
STL — CPR
Oct 1 — Oct 81

How to find the cheapest flight from St. Louis (STL) to Casper (CPR)

All the information you need to plan the best STL to CPR flight in 2023: compare St. Louis to Casper flight prices with the expected peak season, weather and rainfall in Casper.

Popular in

June

Cheapest in

October

Round-trip from

$344
High demand for flights, 26% potential price rise
Best time to find cheap flights, 33% potential price drop
From Lambert-St Louis to Casper Natrona County

STL - CPR

Price

$344 - $695

CPR

Temperature

23 - 69.8 °F

CPR

Rainfall

0.5 - 2 inches

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, October can be a great choice for travel to Casper. Flights to Casper from St. Louis in October are about $634 on average during October, but can be found for as low as $428.

When is the cheapest time to fly from St. Louis to Casper (STL - CPR)?

It’s typically best to fly out from St. Louis to Casper in the morning. Doing so could potentially save you 6% on the flight price compared to flying at noon, which is usually more expensive.

Cheap Delta flights from St. Louis to Casper

Find some of the cheapest Delta flights traveling from St. Louis to Casper. Deals update often to give you more flight options matching your criteria

Cheap United Airlines flights from St. Louis to Casper

Have a look at some of the cheapest available United Airlines flights departing from St. Louis and landing in Casper. Make sure to examine the flight information before completing your reservation.

Cheap St. Louis to Casper flights in September & October 2023

The best prices found for STL to CPR flights for September, October
Listed are some of the best fares we've found on flights departing from St. Louis to Casper in 2023. For more flight deals, be sure to check back very soon.

St. Louis to Casper 2023 flight deals

Cheap flights to Casper from St. Louis found for this year
Listed are some of the best fares we've found on flights departing from St. Louis to Casper in 2023. For more flight deals, be sure to check back very soon.

Find flights from St. Louis to Casper within your budget

Use the slider to find flights from St. Louis to Casper that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$315 - $1,557

Route

Depart

Return

Price

Lambert-St LouisCasper Natrona County

STL - CPR

STLCPR

Lambert-St Louis

Tue 10/24

1 stop5h 21m

Casper Natrona County

Tue 10/31

1 stop6h 22m

Lambert-St LouisCasper Natrona County

STL - CPR

STLCPR

Lambert-St Louis

Tue 10/24

1 stop5h 21m

Casper Natrona County

Tue 10/31

2 stops11h 32m

Lambert-St LouisCasper Natrona County

STL - CPR

STLCPR

Lambert-St Louis

Wed 10/25

1 stop15h 27m

Casper Natrona County

Wed 11/1

2 stops19h 08m

Lambert-St LouisCasper Natrona County

STL - CPR

STLCPR

Lambert-St Louis

Thu 3/14

1 stop8h 21m

Casper Natrona County

Thu 3/21

1 stop4h 08m

Lambert-St LouisCasper Natrona County

STL - CPR

STLCPR

Lambert-St Louis

Thu 3/14

2 stops14h 47m

Casper Natrona County

Thu 3/21

1 stop4h 08m

Lambert-St LouisCasper Natrona County

STL - CPR

STLCPR

Lambert-St Louis

Wed 10/25

2 stops9h 31m

Casper Natrona County

Wed 11/1

2 stops7h 41m

Lambert-St LouisCasper Natrona County

STL - CPR

STLCPR

Lambert-St Louis

Tue 10/24

2 stops13h 16m

Casper Natrona County

Tue 10/31

2 stops7h 37m

Lambert-St LouisCasper Natrona County

STL - CPR

STLCPR

Lambert-St Louis

Thu 3/14

2 stops9h 25m

Casper Natrona County

Thu 3/21

2 stops9h 51m

Flights are sorted by cheapest first

Deals found on 9/24

Reviews of airlines servicing Casper

Peruse reviews from past customers who have flown with Delta and United Airlines from St. Louis to Casper to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
3,021 reviews

Boarding

8.0

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 10

Entire process from checking bags to flight to landing to luggage retrieval was very smooth.

Delta
7.9
Good
3,021 reviews
Delta
7.9
Good
3,021 reviews

Boarding

8.0

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 10

Entire process from checking bags to flight to landing to luggage retrieval was very smooth.

United Airlines
7.4
Good
1,890 reviews
Delta
7.9
Good
3,021 reviews

Boarding

8.0

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 10

Entire process from checking bags to flight to landing to luggage retrieval was very smooth.

Related info for your journey

Useful info, stats and facts about St. Louis to Casper flights.

Can I find flights from St. Louis to Casper for under $400 on Cheapflights?

Yes, there are multiple flights from St. Louis to Casper for under $400. The cheapest flight booked recently is on Delta for just $315, but on average you can expect to pay $612.

What are the cheapest airlines flying from St. Louis to Casper round-trip?

Cheapflights users have booked flights from St. Louis to Casper round-trip from $315. Another airline that can offer you cheap pricing is United Airlines. Delta is currently priced 50% below the average price you’ll pay for this route.

What does STL to CPR mean?

Great question - STL to CPR just means Lambert-St Louis Airport to Casper Natrona County Airport. Now you’ll know what these unique codes when you look for flights!

Top airline flying from St. Louis to Casper

The chart below displays the airlines Cheapflights users traveling from St. Louis to Casper choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$177Average$461FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.