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Rapid City

$269+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — RAP
Jul 8 — Jul 151
Wed 7/8
Wed 7/15
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 June 8, 2026.

This United Airlines deal was found by Cheapflights users on 6/7. 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 10/235:10 am
STL
-
RAP
1 stop5h 18m
United Airlines
Tue 10/2710:45 am
RAP
-
STL
1 stop4h 41m
United Airlines
Deal found 6/7$309
This United Airlines deal was found by Cheapflights users on 6/6. 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 7/46:00 am
STL
-
RAP
1 stop5h 24m
United Airlines
Sat 7/117:00 am
RAP
-
STL
1 stop4h 42m
United Airlines
Deal found 6/6$319
This American Airlines deal was found by Cheapflights users on 6/6. 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.
Mon 6/295:29 am
STL
-
RAP
1 stop5h 20m
American Airlines
Wed 7/84:55 pm
RAP
-
STL
1 stop6h 03m
American Airlines
Deal found 6/6$324
This American Airlines deal was found by Cheapflights users on 6/6. 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.
Sat 7/47:01 am
STL
-
RAP
2 stops10h 19m
American Airlines
Sat 7/114:55 pm
RAP
-
STL
1 stop6h 03m
American Airlines
Deal found 6/6$329
This United Airlines deal was found by Cheapflights users on 6/3. 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 7/147:05 pm
STL
-
RAP
1 stop5h 11m
United Airlines
Tue 7/213:31 pm
RAP
-
STL
1 stop7h 26m
United Airlines
Deal found 6/3$337
This American Airlines deal was found by Cheapflights users on 6/3. 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.
Tue 7/145:32 am
STL
-
RAP
1 stop5h 15m
American Airlines
Tue 7/214:55 pm
RAP
-
STL
1 stop6h 03m
American Airlines
Deal found 6/3$350
This American Airlines deal was found by Cheapflights users on 6/4. 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 6/285:29 am
STL
-
RAP
1 stop5h 20m
American Airlines
Wed 7/84:55 pm
RAP
-
STL
1 stop6h 03m
American Airlines
Deal found 6/4$369
This American Airlines deal was found by Cheapflights users on 6/7. 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.
Sat 9/55:11 pm
STL
-
RAP
1 stop5h 24m
American Airlines
Sat 9/126:07 pm
RAP
-
STL
1 stop5h 20m
American Airlines
Deal found 6/7$375
This United Airlines deal was found by Cheapflights users on 6/4. 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 7/117:05 pm
STL
-
RAP
1 stop5h 11m
United Airlines
Wed 7/224:36 pm
RAP
-
STL
1 stop6h 21m
United Airlines
Deal found 6/4$379
This American Airlines deal was found by Cheapflights users on 6/6. 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.
Mon 7/275:32 am
STL
-
RAP
1 stop5h 15m
American Airlines
Mon 8/34:55 pm
RAP
-
STL
1 stop6h 03m
American Airlines
Deal found 6/6$384
This United Airlines deal was found by Cheapflights users on 6/3. 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 8/221:36 pm
STL
-
RAP
1 stop5h 07m
United Airlines
Wed 8/2610:26 am
RAP
-
STL
1 stop5h 08m
United Airlines
Deal found 6/3$389

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 June 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$309
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$415
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
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 8, 2026.
Use the filters below to find and compare flights from St. Louis to Rapid City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 7/11

7:05 pm-11:16 pm

1 stop5h 11m

Rapid City

Wed 7/22

4:36 pm-11:57 pm

1 stop6h 21m

$379
Quickest round-trip

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 8/22

1:36 pm-5:43 pm

1 stop5h 07m

Rapid City

Wed 8/26

10:26 am-4:34 pm

1 stop5h 08m

$389

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 9/1

5:10 am-9:28 am

1 stop5h 18m

Rapid City

Tue 9/8

1:31 pm-10:00 pm

1 stop7h 29m

$405

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 7/3

4:48 pm-10:25 pm

1 stop6h 37m

Rapid City

Fri 7/10

5:53 pm-11:57 pm

1 stop5h 04m

$414

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 6/19

5:29 pm-11:16 pm

1 stop6h 47m

Rapid City

Tue 6/23

4:40 pm-11:57 pm

1 stop6h 17m

$419

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 7/28

6:55 am-11:14 am

1 stop5h 19m

Rapid City

Fri 7/31

4:55 pm-12:04 am

1 stop6h 09m

$421

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 9/8

4:40 pm-10:28 pm

1 stop6h 48m

Rapid City

Tue 9/15

11:22 am-4:34 pm

1 stop4h 12m

$449

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Mon 8/31

4:40 pm-10:28 pm

1 stop6h 48m

Rapid City

Sun 9/6

5:00 am-3:38 pm

2 stops9h 38m

$449

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Mon 8/10

5:42 am-9:49 am

1 stop5h 07m

Rapid City

Fri 8/14

3:21 pm-12:14 am

1 stop7h 53m

$451
Cheapest one-way
Quickest one-way

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 8/7

5:59 pm-11:30 am

2 stops18h 31m

$479

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/8

Sorted by cheapest first

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 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 FlightHub the most. FlightHub 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

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

Currently, February is the cheapest month in which you can book a flight from St. Louis to Rapid City (average of $289). 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.

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 June 8, 2026.
Read through reviews of airlines operating flights from St. Louis to Rapid City, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,396 reviews

Entertainment

7.8

Food

7.2

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.9
Good
8,396 reviews
Delta
7.9
Good
8,396 reviews

Entertainment

7.8

Food

7.2

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,780 reviews
Delta
7.9
Good
8,396 reviews

Entertainment

7.8

Food

7.2

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,640 reviews
Delta
7.9
Good
8,396 reviews

Entertainment

7.8

Food

7.2

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 can get you from St. Louis to Rapid City in just under 5h 11m. 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, American Airlines ($248), Delta ($248), and United Airlines ($266) offers the cheapest pricing from St. Louis to Rapid City. American Airlines 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, February is the cheapest month in which you can book a flight from St. Louis to Rapid City (average of $289). 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.
Kansas City to Rapid City flights
Springfield to Rapid City flights
St. Louis to Sioux Falls flights
Kansas City to Sioux Falls flights
Springfield to Sioux Falls 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 June 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$323FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$248Average$383FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$266Average$373FlexibilityNo cancel feeOn-time69%

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