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$249+ Cheap flights from Rapid City to St. Louis (RAP - STL)

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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — STL
Mar 9 — Mar 161
Sun 3/9
Sun 3/16
1 adult, Economy
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1. Tell us where you want to go
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Cheap flight deals from Rapid City to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Rapid City (RAP) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 4, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$249
(Delta)

Popular in

May

Cheapest in

June

Average price

$333
Provider with most accurate pricing for Rapid City-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Rapid City-Lambert-St Louis flights.
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From Rapid City to Lambert-St Louis
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Highest demand for flights based on searches. 3% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Rapid City to St. Louis

Cheapest flights from Rapid City to St. Louis
Explore the most affordable flight options available from Rapid City to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 4, 2025.

This Delta deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/44:16 pmRAP - STL
1 stop5h 48mDelta
Sat 4/125:00 pmSTL - RAP
1 stop6h 29mDelta
Deal found 3/3$249
This American Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/312:25 pmRAP - STL
1 stop6h 05mAmerican Airlines
Sat 4/125:26 amSTL - RAP
1 stop7h 30mAmerican Airlines
Deal found 3/3$309
This United Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/35:15 amRAP - STL
2 stops8h 27mUnited Airlines
Sat 4/121:43 pmSTL - RAP
1 stop6h 11mUnited Airlines
Deal found 3/3$374

Find flights from Rapid City to St. Louis within your budget

Customize your flight search to find flights from Rapid City to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 4, 2025.

Fly from

Rapid City

Fly to

St. Louis

Route

Depart

Return

Price

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Fri 4/4

4:16 pm-11:04 pm

1 stop5h 48m

Lambert-St Louis

Sat 4/12

5:00 pm-10:29 pm

1 stop6h 29m

$249

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Thu 4/3

12:25 pm-7:30 pm

1 stop6h 05m

Lambert-St Louis

Sat 4/12

5:26 am-11:56 am

1 stop7h 30m

$309

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Thu 4/3

5:15 am-2:42 pm

2 stops8h 27m

Lambert-St Louis

Sat 4/12

1:43 pm-6:54 pm

1 stop6h 11m

$374

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Mon 7/14

3:25 pm-9:48 pm

1 stop5h 23m

$251

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Mon 7/14

5:30 pm-6:32 pm

3 stops24h 02m

$482

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

Compare providers for flights from Rapid City to St. Louis

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 Rapid City to St. Louis in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust 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 Rapid City-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Rapid City-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Rapid City-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rapid City-St. Louis 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 Rapid City-St. Louis 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 Rapid City to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Rapid City 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 Rapid City to St. Louis

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

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

Currently, August is the cheapest month in which you can book a flight from Rapid City to St. Louis (average of $311). Flying from Rapid City to St. Louis in March is currently the most expensive (average of $356). 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.

Rainfall in St. Louis by month

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

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

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

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated March 4, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines and American Airlines from Rapid City to St. Louis to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,061 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,061 reviews
Delta
8.0
Very good
8,061 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,678 reviews
Delta
8.0
Very good
8,061 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,061 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

  • What are the cheapest airlines flying from Rapid City to St. Louis round-trip?

    Delta, at $249, was found to be the cheapest airline from Rapid City to St. Louis.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Delta is currently priced 39% below the average price you’ll pay for this route.

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

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

  • How can I find direct flights from Rapid City to St. Louis?

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

  • Can I find deals for business class flights from Rapid City to St. Louis?

    Yes. Cheapflights offers flight deals from Rapid City to St. Louis 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 Rapid City to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Rapid City to St. Louis (average of $311). Flying from Rapid City to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near Rapid City?

Book flights to Rapid City if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Alton
Farmington
Chesterfield

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Top 2 airlines flying from Rapid City to St. Louis

Discover the top 2 airlines that operate flights from Rapid City to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$247Average$283FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$299Average$408FlexibilityNo cancel feeOn-time69%
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