$241+ Cheap flights from Rapid City to St. Louis (RAP - STL)
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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — STL
Jul 13 — Jul 201
Round-trip
1 adult, Economy
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Find cheap flights from Rapid City to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Rapid City to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Rapid City to St. LouisExplore 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 June 13, 2026.
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 June 13, 2026.
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/154:55 pm
RAP
- STL
1 stop6h 03m
American Airlines
Sat 7/185:33 am
STL
- RAP
1 stop5h 14m
American Airlines
Deal found 6/8![American Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 6/13. 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 7/151:35 pm
RAP
- STL
1 stop6h 51m
United Airlines
Sat 7/186:00 am
STL
- RAP
1 stop5h 24m
United Airlines
Deal found 6/13![United Airlines logo]()
$341
This United Airlines deal was found by Cheapflights users on 6/10. 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 7/175:53 pm
RAP
- STL
1 stop5h 04m
United Airlines
Sun 7/195:10 am
STL
- RAP
1 stop5h 10m
United Airlines
Deal found 6/10![United Airlines logo]()
$354
This United Airlines deal was found by Cheapflights users on 6/12. 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 7/105:53 pm
RAP
- STL
1 stop5h 04m
United Airlines
Fri 7/177:05 pm
STL
- RAP
1 stop5h 11m
United Airlines
Deal found 6/12![United Airlines logo]()
$380
This American Airlines deal was found by Cheapflights users on 6/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:00 pm
RAP
- STL
1 stop5h 59m
American Airlines
Wed 7/85:32 am
STL
- RAP
1 stop5h 15m
American Airlines
Deal found 6/9![American Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Sat 10/244:26 pm
RAP
- STL
1 stop6h 18m
United Airlines
Wed 10/281:30 pm
STL
- RAP
1 stop4h 33m
United Airlines
Deal found 6/10![United Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Tue 7/74:40 pm
RAP
- STL
1 stop6h 17m
United Airlines
Tue 7/146:00 am
STL
- RAP
1 stop5h 24m
United Airlines
Deal found 6/9![United Airlines logo]()
$407
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/29:50 pm
RAP
- STL
1 stop15h 16m
Multiple Airlines
Thu 7/96:34 pm
STL
- RAP
2 stops39h 41m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$413
Best flights from Rapid City to St. LouisDiscover carefully curated flight deals from Rapid City to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
Discover carefully curated flight deals from Rapid City to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
This American Airlines deal was found by Cheapflights users on 6/13. 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.
Fri 7/174:55 pm
RAP
- STL
1 stop6h 09m
American Airlines
Sun 7/195:32 am
STL
- RAP
1 stop5h 15m
American Airlines
Deal found 6/13![American Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 6/10. 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.
Fri 8/214:30 pm
RAP
- STL
1 stop5h 56m
Delta
Sun 8/235:34 pm
STL
- RAP
1 stop6h 03m
Delta
Deal found 6/10![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 6/10. 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 7/175:53 pm
RAP
- STL
1 stop5h 04m
United Airlines
Sun 7/195:10 am
STL
- RAP
1 stop5h 10m
United Airlines
Deal found 6/10![United Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 6/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:00 pm
RAP
- STL
1 stop5h 59m
American Airlines
Wed 7/85:32 am
STL
- RAP
1 stop5h 15m
American Airlines
Deal found 6/9![American Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 6/12. 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 10/244:26 pm
RAP
- STL
1 stop6h 18m
United Airlines
Wed 10/281:30 pm
STL
- RAP
1 stop4h 33m
United Airlines
Deal found 6/12![United Airlines logo]()
$389
Last-minute flights from Rapid City to St. LouisDiscover last-minute flight deals from Rapid City to St. Louis. Data last updated June 13, 2026 and is based on user searches.
Discover last-minute flight deals from Rapid City to St. Louis. Data last updated June 13, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 6/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/125:00 pm
RAP
- STL
1 stop5h 59m
American Airlines
Sun 6/145:29 am
STL
- RAP
1 stop5h 20m
American Airlines
Deal found 6/9![American Airlines logo]()
$429
This American Airlines deal was found by Cheapflights users on 6/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:00 pm
RAP
- STL
1 stop5h 59m
American Airlines
Wed 7/85:32 am
STL
- RAP
1 stop5h 15m
American Airlines
Deal found 6/9![American Airlines logo]()
$384
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/29:50 pm
RAP
- STL
1 stop15h 16m
Multiple Airlines
Thu 7/96:34 pm
STL
- RAP
2 stops39h 41m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$413
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Tue 7/74:40 pm
RAP
- STL
1 stop6h 17m
United Airlines
Tue 7/146:00 am
STL
- RAP
1 stop5h 24m
United Airlines
Deal found 6/9![United Airlines logo]()
$407
This United Airlines deal was found by Cheapflights users on 6/12. 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 7/105:53 pm
RAP
- STL
1 stop5h 04m
United Airlines
Fri 7/177:05 pm
STL
- RAP
1 stop5h 11m
United Airlines
Deal found 6/12![United Airlines logo]()
$380
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/154:55 pm
RAP
- STL
1 stop6h 03m
American Airlines
Sat 7/185:33 am
STL
- RAP
1 stop5h 14m
American Airlines
Deal found 6/8![American Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 6/13. 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 7/151:35 pm
RAP
- STL
1 stop6h 51m
United Airlines
Sat 7/186:00 am
STL
- RAP
1 stop5h 24m
United Airlines
Deal found 6/13![United Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 6/8. 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 7/154:55 pm
RAP
- STL
1 stop6h 03m
American Airlines
Fri 9/1111:01 am
STL
- RAP
2 stops11h 22m
American Airlines
Deal found 6/8![American Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 6/10. 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 7/175:53 pm
RAP
- STL
1 stop5h 04m
United Airlines
Sun 7/195:10 am
STL
- RAP
1 stop5h 10m
United Airlines
Deal found 6/10![United Airlines logo]()
$354
One-way flights from Rapid City to St. LouisSearch for one-way flight options from Rapid City to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
Search for one-way flight options from Rapid City to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
This United Airlines deal was found by Cheapflights users on 6/9. 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.
Tue 9/2211:22 am
RAP
- STL
1 stop4h 12m
United Airlines
Deal found 6/9![United Airlines logo]()
$241
This American Airlines deal was found by Cheapflights users on 6/12. 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 9/226:30 am
RAP
- STL
2 stops9h 18m
American Airlines
Deal found 6/12![American Airlines logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
Fri 7/105:09 pm
RAP
- STL
2 stops20h 47m
Multiple Airlines
Deal found 6/12![Multiple Airlines logo]()
$288
This United Airlines deal was found by Cheapflights users on 6/12. 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 7/2111:20 am
RAP
- STL
2 stops11h 16m
United Airlines
Deal found 6/12![United Airlines logo]()
$333
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 June 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $309 (American Airlines) |
One-way from | $241 (United Airlines) |
Popular in | April |
Cheapest in | January |
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 June 13, 2026.
Use the filters below to find and compare flights from Rapid City to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Rapid CitySt. Louis
RAP - STL
RAPSTL
Rapid City
Fri 7/17
4:55 pm-12:04 am
1 stop6h 09m
Lambert-St Louis
Sun 7/19
5:32 am-9:47 am
1 stop5h 15m
$309
Rapid CitySt. Louis
RAP - STL
RAPSTL
Rapid City
Fri 8/21
4:30 pm-11:26 pm
1 stop5h 56m
Lambert-St Louis
Sun 8/23
5:34 pm-10:37 pm
1 stop6h 03m
$309
Quickest round-trip
Rapid CitySt. Louis
RAP - STL
RAPSTL
Rapid City
Fri 7/17
5:53 pm-11:57 pm
1 stop5h 04m
Lambert-St Louis
Sun 7/19
5:10 am-9:20 am
1 stop5h 10m
$354
Rapid CitySt. Louis
RAP - STL
RAPSTL
Rapid City
Wed 6/24
5:00 pm-11:59 pm
1 stop5h 59m
Lambert-St Louis
Wed 7/8
5:32 am-9:47 am
1 stop5h 15m
$384
Rapid CitySt. Louis
RAP - STL
RAPSTL
Rapid City
Sat 10/24
4:26 pm-11:44 pm
1 stop6h 18m
Lambert-St Louis
Wed 10/28
1:30 pm-5:03 pm
1 stop4h 33m
$389
Cheapest one-way
Rapid CitySt. Louis
RAP - STL
RAPSTL
Rapid City
Tue 7/21
1:35 pm-9:26 pm
1 stop6h 51m
$241
Rapid CitySt. Louis
RAP - STL
RAPSTL
Rapid City
Tue 9/22
10:19 am-6:04 pm
1 stop6h 45m
$241
Rapid CitySt. Louis
RAP - STL
RAPSTL
Rapid City
Fri 7/10
5:53 pm-11:57 pm
1 stop5h 04m
$241
Quickest one-way
Rapid CitySt. Louis
RAP - STL
RAPSTL
Rapid City
Tue 9/22
11:22 am-4:34 pm
1 stop4h 12m
$241
Sorted by cheapest first
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 June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Rapid City-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Rapid City-St. Louis flight deals on Cheapflights vs. FlightHub >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 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 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.
RAP-STL
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.
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 June 13, 2026.
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.
Comfort
7.8
Food
7.2
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Food
7.2
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
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Rapid City and St. Louis flights
Browse other Rapid City and St. Louis flight options. Last updated on June 13, 2026.
Other flights from Rapid City
Browse through other flights departing from Rapid City. Flights are based on user searches made on Cheapflights and were last updated on June 13, 2026.
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Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 13, 2026.
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 June 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$208 | Average$323 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$264 | Average$386 | FlexibilityNo cancel fee | On-time69% |