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$209+ Cheap flights from Rapid City to St. Louis (RAP - STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — STL
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Rapid City to St. Louis

Cheapest flights from Rapid City to St. Louis
Explore the most affordable flight options available from Rapid City to St. Louis. 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 12/9. 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 12/116:05 amRAP - STL
1 stop4h 59mDelta
Mon 12/155:34 pmSTL - RAP
1 stop6h 12mDelta
Deal found 12/9$369
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:41 pmRAP - STL
2 stops9h 04mUnited Airlines
Mon 12/153:19 pmSTL - RAP
2 stops7h 56mUnited Airlines
Deal found 12/9$415
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.
Wed 12/244:14 pmRAP - STL
1 stop5h 02mDelta
Mon 12/297:06 pmSTL - RAP
1 stop4h 35mDelta
Deal found 12/10$494
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:19 amRAP - STL
2 stops11h 45mDelta
Mon 12/297:06 pmSTL - RAP
1 stop4h 35mDelta
Deal found 12/9$644
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 12/243:35 pmRAP - STL
1 stop5h 47mUnited Airlines
Mon 12/295:45 pmSTL - RAP
2 stops17h 45mUnited Airlines
Deal found 12/10$791
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:11 amRAP - STL
2 stops10h 32mUnited Airlines
Mon 12/296:30 amSTL - RAP
2 stops11h 30mUnited Airlines
Deal found 12/9$849
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:20 pmRAP - STL
2 stops22h 49mAmerican Airlines
Mon 12/298:01 pmSTL - RAP
2 stops18h 49mAmerican Airlines
Deal found 12/10$915

Find flight deals from Rapid City to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Rapid City (RAP) to St. Louis (STL). 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

$209
(Delta)

Popular in

March

Cheapest in

June

Average price

$355
Provider with most accurate pricing for Rapid City-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Rapid City-Lambert-St Louis flights.
Search Deals
From Rapid City to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($153 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Rapid City to St. Louis 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 Rapid City to St. Louis that are best for you.

Fly from

Rapid City

Fly to

St. Louis

Route

Depart

Return

Price

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Thu 1/15

4:10 pm-11:25 pm

1 stop6h 15m

Lambert-St Louis

Sat 1/17

6:10 am-10:13 am

1 stop5h 03m

$209

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Thu 2/5

5:10 am-1:16 pm

1 stop7h 06m

Lambert-St Louis

Tue 2/10

8:45 am-3:22 pm

1 stop7h 37m

$269

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Wed 1/7

10:54 am-4:45 pm

1 stop4h 51m

Lambert-St Louis

Sat 1/10

6:10 am-10:13 am

1 stop5h 03m

$269

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Fri 1/9

4:10 pm-11:25 pm

1 stop6h 15m

Lambert-St Louis

Fri 1/16

6:10 am-10:13 am

1 stop5h 03m

$269

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Sat 1/10

2:40 pm-8:58 pm

1 stop5h 18m

Lambert-St Louis

Tue 1/13

4:15 pm-10:29 pm

1 stop7h 14m

$319

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Wed 1/7

8:30 am-4:55 pm

1 stop7h 25m

Lambert-St Louis

Sat 1/10

8:30 am-7:14 pm

2 stops11h 44m

$344

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Tue 12/16

5:15 am-12:32 pm

1 stop6h 17m

$346

Rapid CitySt. Louis

RAP - STL

RAPSTL

Rapid City

Tue 12/16

8:30 am-11:42 pm

2 stops14h 12m

$351

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Compare providers for flights from Rapid City to St. Louis

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 Rapid City to St. Louis in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 Rapid City-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Rapid City-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Rapid City-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rapid City-St. Louis 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 Rapid City-St. Louis 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 Rapid City to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Rapid City 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 Rapid City to St. Louis

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

Currently, May is the cheapest month in which you can book a flight from Rapid City to St. Louis (average of $188). Flying from Rapid City to St. Louis in March is currently the most expensive (average of $704). 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 Rapid City to St. Louis?

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated December 12, 2025.
Get a feel of what it's like to fly with Delta and United Airlines from Rapid City to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,007 reviews

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

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
8,007 reviews
Delta
7.9
Good
8,007 reviews

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

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
8,007 reviews

Boarding

8.1

Overall

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

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 Rapid City to St. Louis. 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 Rapid City to St. Louis?

    For as low as $209, Delta can have you in St. Louis from Rapid City in 6h 15m. The distance between Rapid City and St. Louis is about 751 mi. This flight may include one or multiple stops.

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

    Delta, at $174, was found to be the cheapest airline from Rapid City to St. Louis. An alternate airline flying to your destination would be United Airlines. Delta is currently priced 61% below the average price you’ll pay for this route.

  • Can I find deals for flights from Rapid City to St. Louis that include hotel bookings?

    Yes. In addition to deals on Rapid City to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Rapid City to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Rapid City to St. Louis.

  • Can I find deals for business class flights from Rapid City to St. Louis?

    Yes. Cheapflights offers flight deals from Rapid City to St. Louis 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 Rapid City to St. Louis?

    Currently, May is the cheapest month in which you can book a flight from Rapid City to St. Louis (average of $188). Flying from Rapid City to St. Louis in March is currently the most expensive (average of $704). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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Top 2 airlines flying from Rapid City to St. Louis

Discover the top 2 airlines that operate flights from Rapid City to St. Louis. 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$323FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$264Average$426FlexibilityNo cancel feeOn-time69%

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