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Rapid City

$175+ 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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — RAP
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 February, booked 25 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 July 30, 2025.

Round-trip from

$249
(Delta)

One-way from

$175
(American Airlines)

Popular in

December

Cheapest in

November

Average price

$318
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 ($16 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Delta deal was found by Cheapflights users on 7/29. 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 10/246:00 amSTL - RAP
1 stop4h 53mDelta
Mon 10/274:34 pmRAP - STL
1 stop5h 27mDelta
Deal found 7/29$249
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/2712:25 pmSTL - RAP
2 stops7h 15mUnited Airlines
Tue 9/305:50 pmRAP - STL
1 stop5h 08mUnited Airlines
Deal found 7/29$254
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/215:27 amSTL - RAP
1 stop6h 09mAmerican Airlines
Sun 8/246:12 pmRAP - STL
1 stop4h 39mAmerican Airlines
Deal found 7/27$274
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/212:30 pmSTL - RAP
3 stops26h 46mMultiple Airlines
Sun 8/248:30 pmRAP - STL
3 stops16h 02mMultiple Airlines
Deal found 7/27$464

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 July 30, 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

Fri 10/24

6:00 am-9:53 am

1 stop4h 53m

Rapid City

Mon 10/27

4:34 pm-11:01 pm

1 stop5h 27m

$249

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 9/27

12:25 pm-6:40 pm

2 stops7h 15m

Rapid City

Tue 9/30

5:50 pm-11:58 pm

1 stop5h 08m

$254

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 8/21

5:27 am-10:36 am

1 stop6h 09m

Rapid City

Sun 8/24

6:12 pm-11:51 pm

1 stop4h 39m

$274

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 8/21

2:30 pm-4:16 pm

3 stops26h 46m

Rapid City

Sun 8/24

8:30 pm-1:32 pm

3 stops16h 02m

$464

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sun 9/14

5:27 am-11:22 am

1 stop6h 55m

$175

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 9/16

2:15 pm-10:30 pm

2 stops9h 15m

$180

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Mon 10/20

12:25 pm-8:34 pm

2 stops9h 09m

$249

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 8/9

10:45 am-8:59 pm

3 stops35h 14m

$340

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 July 25, 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 25 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, January is the cheapest month in which you can book a flight from St. Louis to Rapid City (average of $348). Flying from St. Louis to Rapid City in June is currently the most expensive (average of $502). 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 July 30, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Rapid City in the afternoon. If you’re flexible enough to do this you can expect to save up to 15% 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 July 30, 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
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    According to our current data, Delta ($249), United Airlines ($254), and American Airlines ($274) 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.

  • What are the cheapest airlines to fly from St. Louis to Rapid City one-way?

    One-way options have recently been found by users for as low as $175 on American Airlines. Other airlines that offer cheap prices include Delta from $180 and United Airlines from $249 one-way.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Rapid City (average of $348). Flying from St. Louis to Rapid City in June is currently the most expensive (average of $502). 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$248Average$389FlexibilityNo cancel feeOn-time71%
DeltaCheapest$248Average$310FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$406FlexibilityNo cancel feeOn-time69%

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