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Rapid City

$191+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — RAP
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Rapid City are usually found in August or February, booked 79 days in advance, depart on a Friday or Saturday and return on a Monday

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 December 12, 2025.

This Delta deal was found by Cheapflights users on 12/10. 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.
Sat 12/2011:59 amSTL - RAP
1 stop4h 35mDelta
Thu 1/14:14 pmRAP - STL
1 stop5h 02mDelta
Deal found 12/10$525
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/316:35 pmSTL - RAP
1 stop16h 55mUnited Airlines
Fri 1/28:45 amRAP - STL
1 stop12h 37mUnited Airlines
Deal found 12/10$599
This American Airlines deal was found by Cheapflights users on 12/9. 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.
Fri 12/197:00 amSTL - RAP
1 stop7h 50mAmerican Airlines
Mon 12/222:20 pmRAP - STL
1 stop7h 36mAmerican Airlines
Deal found 12/9$690
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/202:45 pmSTL - RAP
1 stop5h 27mUnited Airlines
Thu 1/17:00 amRAP - STL
1 stop5h 20mUnited Airlines
Deal found 12/11$715
This Delta deal was found by Cheapflights users on 12/11. 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 12/266:05 amSTL - RAP
1 stop6h 07mDelta
Tue 12/304:14 pmRAP - STL
1 stop5h 02mDelta
Deal found 12/11$760
This Kiwi.com deal was found by Cheapflights users on 12/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:10 pmSTL - RAP
1 stop13h 05mMultiple Airlines
Tue 12/3010:40 amRAP - STL
2 stops22h 22mMultiple Airlines
Deal found 12/11$844

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$264
(Delta)

One-way from

$191
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$523
Provider with most accurate pricing for Lambert-St Louis-Rapid City flight deals.
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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. 2% potential increase in price ($7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 12, 2025.
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

Thu 2/5

6:10 am-10:11 am

1 stop5h 01m

Rapid City

Sun 3/1

4:26 pm-11:23 pm

1 stop5h 57m

$264

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sun 2/8

6:10 am-10:11 am

1 stop5h 01m

Rapid City

Sun 3/1

4:26 pm-11:23 pm

1 stop5h 57m

$264

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 2/10

11:23 am-3:25 pm

1 stop5h 02m

Rapid City

Sun 3/1

4:26 pm-11:23 pm

1 stop5h 57m

$264

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 2/6

6:35 am-3:25 pm

2 stops9h 50m

Rapid City

Sun 3/1

4:26 pm-11:23 pm

1 stop5h 57m

$269

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 2/4

6:35 am-3:25 pm

2 stops9h 50m

Rapid City

Sun 3/1

4:26 pm-11:23 pm

1 stop5h 57m

$269

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 2/7

11:23 am-3:25 pm

1 stop5h 02m

Rapid City

Sun 3/1

4:26 pm-11:23 pm

1 stop5h 57m

$294

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 2/7

8:45 am-1:12 pm

1 stop5h 27m

Rapid City

Sun 3/1

2:52 pm-8:26 pm

1 stop4h 34m

$317

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 1/6

4:15 pm-8:32 pm

1 stop5h 17m

Rapid City

Sat 1/10

2:40 pm-8:58 pm

1 stop5h 18m

$319

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 2/4

3:46 pm-9:20 pm

2 stops30h 34m

Rapid City

Sun 3/1

5:42 pm-9:13 pm

1 stop26h 31m

$321

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 12/19

8:42 pm-8:13 am

1 stop12h 31m

$191

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 18 results
1
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 St. Louis-Rapid City flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Rapid City flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 5, 2025.

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 $203). Flying from St. Louis to Rapid City in December is currently the most expensive (average of $417). 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 time of day to fly from STL to RAP?

Find hourly flight availability from St. Louis to Rapid City. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Rapid City in the evening. If you’re flexible enough to do this you can expect to save up to 47% on your trip compared to booking a flight in the morning.

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 December 12, 2025.
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
8,008 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

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
8,008 reviews
Delta
7.9
Good
8,008 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

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
9,095 reviews
Delta
7.9
Good
8,008 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

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
11,050 reviews
Delta
7.9
Good
8,008 reviews

Entertainment

7.9

Food

7.3

Boarding

8.1

Comfort

7.9

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 can get you from St. Louis to Rapid City in just under 5h 01m. Your travel time can differ by up to . There are 751 mi between St. Louis and Rapid City.

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

    According to our current data, Delta ($248), American Airlines ($248), and United Airlines ($253) offers the cheapest pricing from St. Louis to Rapid City. Delta is priced at 32% 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 $203). Flying from St. Louis to Rapid City in December is currently the most expensive (average of $417). 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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Springfield to Rapid City flights

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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$310FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$248Average$437FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$253Average$389FlexibilityNo cancel feeOn-time69%

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