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Rapid City

$185+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — RAP
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 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 September 11, 2025.

Round-trip from

$249
(United Airlines)

One-way from

$185
(American Airlines)

Popular in

December

Cheapest in

November

Average price

$369
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, 0% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/131:35 pmSTL - RAP
1 stop4h 35mUnited Airlines
Tue 12/167:00 amRAP - STL
1 stop4h 39mUnited Airlines
Deal found 9/9$249
This Delta deal was found by Cheapflights users on 9/11. 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.
Sun 10/266:00 amSTL - RAP
1 stop4h 53mDelta
Sun 11/25:05 amRAP - STL
1 stop4h 29mDelta
Deal found 9/11$328
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 10/101:40 pmSTL - RAP
1 stop6h 00mUnited Airlines
Sun 10/124:35 pmRAP - STL
1 stop6h 23mUnited Airlines
Deal found 9/10$336
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:00 amSTL - RAP
1 stop5h 27mDelta
Wed 11/264:25 pmRAP - STL
1 stop5h 58mDelta
Deal found 9/9$398
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:00 amSTL - RAP
2 stops9h 09mDelta
Tue 12/1611:02 amRAP - STL
2 stops9h 56mDelta
Deal found 9/9$433
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:49 amSTL - RAP
1 stop8h 09mAmerican Airlines
Sun 11/25:18 amRAP - STL
2 stops13h 11mAmerican Airlines
Deal found 9/11$517
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/206:04 amSTL - RAP
1 stop5h 58mDelta
Thu 1/14:15 pmRAP - STL
1 stop4h 53mDelta
Deal found 9/9$523
This Delta deal was found by Cheapflights users on 9/10. 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.
Thu 10/166:00 amSTL - RAP
1 stop4h 53mDelta
Sun 10/196:05 amRAP - STL
1 stop4h 29mDelta
Deal found 9/10$559

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 September 11, 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

Sun 10/26

6:00 am-9:53 am

1 stop4h 53m

Rapid City

Sun 11/2

5:05 am-10:34 am

1 stop4h 29m

$328

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 10/10

1:40 pm-6:40 pm

1 stop6h 00m

Rapid City

Sun 10/12

4:35 pm-11:58 pm

1 stop6h 23m

$336

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 11/20

6:00 am-10:27 am

1 stop5h 27m

Rapid City

Wed 11/26

4:25 pm-11:23 pm

1 stop5h 58m

$398

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sun 10/26

8:49 am-3:58 pm

1 stop8h 09m

Rapid City

Sun 11/2

5:18 am-7:29 pm

2 stops13h 11m

$517

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 11/20

6:00 am-9:17 pm

2 stops16h 17m

Rapid City

Wed 11/26

1:44 pm-1:17 pm

2 stops22h 33m

$578

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Mon 9/15

6:05 am-12:42 pm

1 stop7h 37m

Rapid City

Wed 9/17

5:00 pm-10:50 pm

1 stop4h 50m

$606

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 10/16

10:17 am-9:13 am

2 stops23h 56m

Rapid City

Sun 10/19

5:58 pm-11:43 am

1 stop16h 45m

$610

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 9/24

7:55 pm-4:49 pm

2 stops21h 54m

Rapid City

Sun 9/28

5:39 pm-8:44 pm

1 stop26h 05m

$634

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 9/24

5:15 am-9:06 am

1 stop4h 51m

Rapid City

Sun 9/28

8:30 am-11:58 pm

1 stop14h 28m

$662

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 10/7

5:09 pm-9:19 pm

1 stop5h 10m

$185

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 13 results
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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 August 29, 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 36 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 September 11, 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.

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 September 11, 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
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

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
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

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
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

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.

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

    Delta, United Airlines, and American Airlines can get you from St. Louis to Rapid City in just under 4h 53m. Your travel time can differ by up to 3h 16m. 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 33% 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, 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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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$287FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$248Average$408FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$253Average$397FlexibilityNo cancel feeOn-time69%

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