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

Cheapflights users have booked flights from St. Louis to Casper round-trip from $315.

What is the cheapest month to book a flight from St. Louis to Casper?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Casper (average of $348). Flying from St. Louis to Casper in June is currently the most expensive (average of $552). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Travelers seeking maximum savings on their St. Louis to Casper flight should consider departing on Saturday afternoons when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from St. Louis to Casper?

Flying to your destination on a Monday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Casper. Check prices with Cheapflights to find a great deal for your trip.

What is the cheapest time of day to fly from STL to CPR?

It’s typically best to fly out from St. Louis to Casper at noon. Doing so could potentially save you 19% on the flight price compared to flying in the afternoon, which is usually more expensive.

Most accurate provider : When it comes to deals on St. Louis-Casper flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Casper flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Casper flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Casper flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Casper flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from St. Louis to Casper that include hotel bookings?

Yes. In addition to deals on St. Louis to Casper flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Casper?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Casper.

Can I find deals for business class flights from St. Louis to Casper?

Yes. Cheapflights offers flight deals from St. Louis to Casper by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$315+ Flights from St. Louis to Casper

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Cheap flight deals from St. Louis to Casper

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$315 (United)

Provider with most accurate pricing for Lambert-St Louis-Casper Natrona County flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Casper Natrona County flights.

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From Lambert-St Louis to Casper Natrona County

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Find flight deals from St. Louis to Casper

Cheapest flights from St. Louis to Casper
Explore the most affordable flight options available from St. Louis to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Fri 5/29:40 amSTL - CPR

2 stops13h 31mUnited Airlines

Tue 5/61:30 pmCPR - STL

1 stop6h 31mUnited Airlines

Deal found 2/20

$315

Best flights from St. Louis to Casper
Discover carefully curated flight deals from St. Louis to Casper that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 20, 2025.

Fri 5/29:40 amSTL - CPR

2 stops13h 31mUnited Airlines

Tue 5/61:30 pmCPR - STL

1 stop6h 31mUnited Airlines

Deal found 2/20

$315

One-way flights from St. Louis to Casper
Search for one-way flight options from St. Louis to Casper. Find affordable one-way fares based on user searches. Data last updated February 20, 2025.

Fri 4/111:43 pmSTL - CPR

1 stop23h 57mUnited Airlines

Deal found 2/20

$345

Find flights from St. Louis to Casper within your budget

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Fri 5/2

9:40 am-10:11 pm

2 stops13h 31m

Casper Natrona County

Tue 5/6

1:30 pm-9:01 pm

1 stop6h 31m

$315

St. LouisCasper

STL - CPR

STLCPR

Lambert-St Louis

Fri 4/11

1:43 pm-12:40 pm

1 stop23h 57m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Compare providers for flights from St. Louis to Casper

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Casper in February.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Casper flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Casper flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Casper flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Casper flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Casper flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Casper

Have a flexible travel schedule? Discover the best time to fly to Casper from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from St. Louis to Casper

Get recent, data-driven insights about flights from St. Louis to Casper including ideal travel times, pricing trends, and more.

Rainfall in Casper by month

In terms of precipitation, rainfall in Casper ranges from 0.5 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. January is typically the driest time to visit Casper when rainfall is around 0.5 in.

Temperature in Casper by month

If weather is an important factor for your trip to Casper, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Casper

United Airlines

7.4

Good

8,765 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,765 reviews

United Airlines

7.4

Good

8,765 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

What is the cheapest airline to fly from St. Louis to Casper round-trip?
Cheapflights users have booked flights from St. Louis to Casper round-trip from $315.
Can I find deals for flights from St. Louis to Casper that include hotel bookings?
Yes. In addition to deals on St. Louis to Casper flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Casper?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Casper.
Can I find deals for business class flights from St. Louis to Casper?
Yes. Cheapflights offers flight deals from St. Louis to Casper by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Casper?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Casper (average of $348). Flying from St. Louis to Casper in June is currently the most expensive (average of $552). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Rawlins

Douglas

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Alternative routes for St. Louis to Casper

Top airline flying from St. Louis to Casper

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$248	Average$398	FlexibilityNo cancel fee	On-time69%

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

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Casper with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Casper

Most accurate provider

Most trusted provider

Round-trip from

Find flight deals from St. Louis to Casper

Cheapest flights from St. Louis to CasperExplore the most affordable flight options available from St. Louis to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Explore the most affordable flight options available from St. Louis to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Find flights from St. Louis to Casper within your budget

Compare providers for flights from St. Louis to Casper

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Casper in February.

Best time to book a flight from St. Louis to Casper

Have a flexible travel schedule? Discover the best time to fly to Casper from St. Louis with our price prediction graph.

Travel insights for flights from St. Louis to Casper

Get recent, data-driven insights about flights from St. Louis to Casper including ideal travel times, pricing trends, and more.

Rainfall in Casper by month

Plan your trip to Casper by taking into account the average rainfall totals by month.

Temperature in Casper by month

Plan your trip to Casper by taking into account the average temperature totals by month.

Reviews of airlines servicing Casper

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Casper. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

Can I find deals for flights from St. Louis to Casper that include hotel bookings?

How can I find direct flights from St. Louis to Casper?

Can I find deals for business class flights from St. Louis to Casper?

What is the cheapest month to book a flight from St. Louis to Casper?

Traveling to a place near St. Louis?

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Alternative routes for St. Louis to Casper

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Top airline flying from St. Louis to Casper

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from St. Louis to Casper
Explore the most affordable flight options available from St. Louis to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.