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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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — RAP
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Rapid City are usually found in November or August, 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

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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$259
(United Airlines)

One-way from

$191
(Delta)

Popular in

December

Cheapest in

November

Average price

$406
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.
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From Lambert-St Louis to Rapid City
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One-way flight from Lambert-St Louis to Rapid City
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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/27. 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.
Tue 11/114:55 pmSTL - RAP
1 stop6h 04mUnited Airlines
Sat 11/153:18 pmRAP - STL
1 stop5h 36mUnited Airlines
Deal found 10/27$259
This Delta deal was found by Cheapflights users on 10/27. 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.
Tue 11/256:00 amSTL - RAP
1 stop5h 27mDelta
Tue 12/24:25 pmRAP - STL
1 stop6h 04mDelta
Deal found 10/27$274
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Tue 10/284:55 pmSTL - RAP
1 stop6h 04mUnited Airlines
Sun 11/210:22 amRAP - STL
1 stop5h 06mUnited Airlines
Deal found 10/26$334
This United Airlines deal was found by Cheapflights users on 10/27. 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 10/311:35 pmSTL - RAP
1 stop6h 08mUnited Airlines
Sun 11/23:18 pmRAP - STL
1 stop5h 36mUnited Airlines
Deal found 10/27$349
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Mon 11/249:54 pmSTL - RAP
1 stop12h 49mMultiple Airlines
Mon 12/12:03 pmRAP - STL
2 stops31h 30mMultiple Airlines
Deal found 10/27$449
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Mon 11/249:00 amSTL - RAP
1 stop6h 43mUnited Airlines
Mon 12/17:10 amRAP - STL
1 stop13h 44mUnited Airlines
Deal found 10/27$477

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 October 28, 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

Tue 11/11

4:55 pm-9:59 pm

1 stop6h 04m

Rapid City

Sat 11/15

3:18 pm-9:54 pm

1 stop5h 36m

$259

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 11/25

6:00 am-10:27 am

1 stop5h 27m

Rapid City

Tue 12/2

4:25 pm-11:29 pm

1 stop6h 04m

$274

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 10/31

1:35 pm-6:43 pm

1 stop6h 08m

Rapid City

Sun 11/2

3:18 pm-9:54 pm

1 stop5h 36m

$349

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Mon 11/24

9:54 pm-9:43 am

1 stop12h 49m

Rapid City

Mon 12/1

2:03 pm-10:33 pm

2 stops31h 30m

$449

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Mon 11/24

9:00 am-2:43 pm

1 stop6h 43m

Rapid City

Mon 12/1

7:10 am-9:54 pm

1 stop13h 44m

$477

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 11/25

8:25 am-6:43 pm

2 stops11h 18m

Rapid City

Tue 12/2

5:15 am-3:40 pm

2 stops9h 25m

$545

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 12/20

2:45 pm-7:12 pm

1 stop5h 27m

Rapid City

Thu 1/1

7:00 am-1:20 pm

1 stop5h 20m

$634

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 11/18

9:04 am-2:11 pm

1 stop6h 07m

$191

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 11/18

5:24 pm-11:05 am

3 stops18h 41m

$406

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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 October.
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 October 24, 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 $201). Flying from St. Louis to Rapid City in June is currently the most expensive (average of $352). 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 October 28, 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.

How much does it cost to fly round-trip from St. Louis to Rapid City?

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 October 28, 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
7,994 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,994 reviews
Delta
7.9
Good
7,994 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
9,001 reviews
Delta
7.9
Good
7,994 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,032 reviews
Delta
7.9
Good
7,994 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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?

    United Airlines and Delta can get you from St. Louis to Rapid City in just under 5h 27m. Your travel time can differ by up to 37m. 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, Delta ($248), American Airlines ($248), and United Airlines ($253) offers the cheapest pricing from St. Louis to Rapid City. Delta is priced at 31% 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 $201). Flying from St. Louis to Rapid City in June is currently the most expensive (average of $352). 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
Deadwood
Keystone
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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$300FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$248Average$428FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$253Average$388FlexibilityNo cancel feeOn-time69%

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