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Rapid City

$256+ Cheap flights from St. Louis to Rapid City (STL - RAP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — RAP
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
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Cheap flight deals from St. Louis to Rapid City

Cheapest flights from St. Louis to Rapid City
Explore the most affordable flight options available from St. Louis to Rapid City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 20, 2026.

This Delta deal was found by Cheapflights users on 1/18. 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.
Wed 4/15:25 pm
STL
-
RAP
1 stop6h 00m
Delta
Tue 4/76:00 am
RAP
-
STL
1 stop7h 24m
Delta
Deal found 1/18$269
This Delta deal was found by Cheapflights users on 1/19. 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.
Wed 2/45:25 pm
STL
-
RAP
1 stop6h 03m
Delta
Thu 2/124:29 pm
RAP
-
STL
1 stop5h 54m
Delta
Deal found 1/19$274
This United Airlines deal was found by Cheapflights users on 1/19. 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.
Wed 2/42:45 pm
STL
-
RAP
1 stop6h 47m
United Airlines
Sun 2/812:35 pm
RAP
-
STL
1 stop7h 23m
United Airlines
Deal found 1/19$279
This United Airlines deal was found by Cheapflights users on 1/18. 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.
Sat 2/288:41 am
STL
-
RAP
1 stop5h 32m
United Airlines
Fri 3/610:00 am
RAP
-
STL
1 stop5h 59m
United Airlines
Deal found 1/18$290
This United Airlines deal was found by Cheapflights users on 1/18. 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.
Fri 1/302:45 pm
STL
-
RAP
1 stop6h 47m
United Airlines
Fri 2/610:45 am
RAP
-
STL
1 stop5h 10m
United Airlines
Deal found 1/18$309
This Delta deal was found by Cheapflights users on 1/18. 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.
Mon 2/166:10 am
STL
-
RAP
1 stop4h 59m
Delta
Fri 2/2010:54 am
RAP
-
STL
1 stop4h 51m
Delta
Deal found 1/18$321
This United Airlines deal was found by Cheapflights users on 1/19. 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.
Sat 2/214:30 pm
STL
-
RAP
1 stop5h 14m
United Airlines
Wed 2/258:30 am
RAP
-
STL
1 stop7h 28m
United Airlines
Deal found 1/19$339
This Delta deal was found by Cheapflights users on 1/18. 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 1/236:10 am
STL
-
RAP
1 stop5h 03m
Delta
Wed 1/284:10 pm
RAP
-
STL
1 stop6h 15m
Delta
Deal found 1/18$354

Find flight deals from St. Louis to Rapid City

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Rapid City (RAP). 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 January 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$269
(Delta)

One-way from

$256
(United Airlines)

Popular in

January

Cheapest in

August

Average price

$555
Provider with most accurate pricing for Lambert-St Louis-Rapid City flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Rapid City flights.
Search Deals
From Lambert-St Louis to Rapid City
Search Deals
One-way flight from Lambert-St Louis to Rapid City
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Rapid City 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 January 20, 2026.
Use the filters below to find and compare flights from St. Louis to Rapid City that are best for you.

Fly from

St. Louis

Fly to

Rapid City

Route

Depart

Return

Price

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 4/1

5:25 pm-10:25 pm

1 stop6h 00m

Rapid City

Tue 4/7

6:00 am-2:24 pm

1 stop7h 24m

$269

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 4/1

11:15 am-8:44 pm

2 stops10h 29m

Rapid City

Tue 4/7

2:42 pm-8:54 pm

1 stop5h 12m

$274

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 2/3

5:25 pm-10:28 pm

1 stop6h 03m

Rapid City

Thu 2/12

4:29 pm-11:23 pm

1 stop5h 54m

$274

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 2/4

5:25 pm-10:28 pm

1 stop6h 03m

Rapid City

Thu 2/12

4:29 pm-11:23 pm

1 stop5h 54m

$274

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 2/4

2:45 pm-8:32 pm

1 stop6h 47m

Rapid City

Sun 2/8

12:35 pm-8:58 pm

1 stop7h 23m

$279

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 2/28

8:41 am-1:13 pm

1 stop5h 32m

Rapid City

Fri 3/6

10:00 am-4:59 pm

1 stop5h 59m

$290

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 1/30

2:45 pm-8:32 pm

1 stop6h 47m

Rapid City

Fri 2/6

10:45 am-4:55 pm

1 stop5h 10m

$309

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 2/4

2:45 pm-8:32 pm

1 stop6h 47m

$256

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Compare providers for flights from St. Louis to Rapid City

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 Rapid City in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

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

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

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Rapid City

How far ahead should I book a flight from St. Louis to Rapid City?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Rapid City. Price data was last updated on January 16, 2026.

The price you pay for your flight from St. Louis to Rapid City may vary depending on when you book. For the best chance of a lower fare, look to book 21 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, July is the cheapest month in which you can book a flight from St. Louis to Rapid City (average of $234). Flying from St. Louis to Rapid City in December is currently the most expensive (average of $458). 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.

Reviews of airlines servicing Rapid City

Get insights into the airlines that provide service to Rapid City. 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 Rapid City. Reviews last updated January 20, 2026.
Read through reviews of airlines operating flights from St. Louis to Rapid City, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,080 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,080 reviews
Delta
7.9
Good
8,080 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,183 reviews
Delta
7.9
Good
8,080 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,164 reviews
Delta
7.9
Good
8,080 reviews

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

  • How long is the flight from St. Louis to Rapid City?

    Delta and United Airlines can get you from St. Louis to Rapid City in just under 6h. Your travel time can differ by up to 4h 29m. There are 751 mi between St. Louis and Rapid City. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, American Airlines ($248), Delta ($248), and United Airlines ($253) offers the cheapest pricing from St. Louis to Rapid City. American Airlines is priced at 34% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from St. Louis to Rapid City (average of $234). Flying from St. Louis to Rapid City in December is currently the most expensive (average of $458). 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
Keystone
Deadwood
Sturgis
Spearfish

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Alternative routes for St. Louis to Rapid City

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from St. Louis to Rapid City

Discover the top 3 airlines that operate flights from St. Louis to Rapid City. 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 January 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$308FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$248Average$429FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$253Average$388FlexibilityNo cancel feeOn-time69%

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