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Cheap flights from St. Louis to Rapid City from $114

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Rapid City departing on 8/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Rapid City

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:43 am - 9:47 am
STL
-
RAP
5h 04m
1 stop
American Airlines Logo
6:07 pm - 12:27 am
RAP
-
STL
5h 20m
1 stop
$309American Airlines
Tue, Sep 22 - Fri, Oct 2
American Airlines Logo
7:07 am - 12:11 pm
STL
-
RAP
6h 04m
1 stop
American Airlines Logo
4:55 pm - 11:58 pm
RAP
-
STL
6h 03m
1 stop
$324American Airlines
Mon, Jul 6 - Mon, Jul 20
American Airlines Logo
6:55 am - 11:14 am
STL
-
RAP
5h 19m
1 stop
American Airlines Logo
3:26 pm - 12:16 am
RAP
-
STL
7h 50m
1 stop
$339American Airlines
Tue, Jul 7 - Sat, Jul 11
United Airlines Logo
5:10 am - 9:19 am
STL
-
RAP
5h 09m
1 stop
United Airlines Logo
5:53 pm - 11:57 pm
RAP
-
STL
5h 04m
1 stop
$354United Airlines
Thu, Jul 23 - Wed, Jul 29
United Airlines Logo
10:53 am - 5:53 pm
STL
-
RAP
8h 00m
2 stops
United Airlines Logo
11:22 am - 4:34 pm
RAP
-
STL
4h 12m
1 stop
$359United Airlines
Wed, Aug 19 - Thu, Sep 3
United Airlines Logo
1:38 pm - 7:24 pm
STL
-
RAP
6h 46m
1 stop
United Airlines Logo
6:00 am - 12:11 pm
RAP
-
STL
5h 11m
1 stop
$360United Airlines
Sun, Jul 5 - Sat, Jul 11
United Airlines Logo
1:38 pm - 5:12 pm
STL
-
RAP
4h 34m
1 stop
United Airlines Logo
6:00 am - 12:11 pm
RAP
-
STL
5h 11m
1 stop
$366United Airlines
Sun, Jul 5 - Sat, Jul 11
United Airlines Logo
5:10 am - 9:19 am
STL
-
RAP
5h 09m
1 stop
United Airlines Logo
6:00 am - 12:11 pm
RAP
-
STL
5h 11m
1 stop
$369United Airlines
Wed, Jul 8 - Sat, Jul 11
American Airlines Logo
11:01 am - 9:23 pm
STL
-
RAP
11h 22m
2 stops
American Airlines Logo
6:07 pm - 12:27 am
RAP
-
STL
5h 20m
1 stop
$374American Airlines
Fri, Sep 11 - Mon, Sep 14
United Airlines Logo
5:10 am - 9:19 am
STL
-
RAP
5h 09m
1 stop
United Airlines Logo
5:53 pm - 11:57 pm
RAP
-
STL
5h 04m
1 stop
$379United Airlines
Thu, Jul 23 - Mon, Jul 27

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American Airlines flights from St. Louis to Rapid City

Our best American Airlines deals on St. Louis to Rapid City flight tickets
American Airlines
Jul 6
STL7:07 amLambert-St Louis
6h 04m
1 stop
RAP12:11 pmRapid City
Jul 20
RAP4:55 pmRapid City
6h 03m
1 stop
STL11:58 pmLambert-St Louis
$324
American Airlines
Jul 7
STL6:55 amLambert-St Louis
5h 19m
1 stop
RAP11:14 amRapid City
Jul 11
RAP3:26 pmRapid City
7h 50m
1 stop
STL12:16 amLambert-St Louis
$339
American Airlines
Sep 11
STL11:01 amLambert-St Louis
11h 22m
2 stops
RAP9:23 pmRapid City
Sep 14
RAP6:07 pmRapid City
5h 20m
1 stop
STL12:27 amLambert-St Louis
$374

Delta flights from St. Louis to Rapid City

Our best Delta deals on St. Louis to Rapid City flight tickets
Delta
Jul 11
STL5:36 pmLambert-St Louis
5h 50m
1 stop
RAP10:26 pmRapid City
Jul 14
RAP2:31 pmRapid City
8h 22m
2 stops
STL11:53 pmLambert-St Louis
$514
Delta
Jun 26
STL11:18 amLambert-St Louis
4h 01m
1 stop
RAP2:19 pmRapid City
Jun 28
RAP2:59 pmRapid City
7h 57m
2 stops
STL11:56 pmLambert-St Louis
$724
Delta
Jun 28
STL6:30 amLambert-St Louis
10h 18m
2 stops
RAP3:48 pmRapid City
Jun 30
RAP6:48 amRapid City
9h 35m
2 stops
STL5:23 pmLambert-St Louis
$793

momondo 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, momondo users made 832,500 searches. Data last updated June 23, 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

Tue 9/22

5:43 am-9:47 am

1 stop5h 04m

Rapid City

Fri 10/2

6:07 pm-12:27 am

1 stop5h 20m

$309

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Mon 7/6

7:07 am-12:11 pm

1 stop6h 04m

Rapid City

Mon 7/20

4:55 pm-11:58 pm

1 stop6h 03m

$324

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 7/7

6:55 am-11:14 am

1 stop5h 19m

Rapid City

Sat 7/11

3:26 pm-12:16 am

1 stop7h 50m

$339

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 7/23

5:10 am-9:19 am

1 stop5h 09m

Rapid City

Wed 7/29

5:53 pm-11:57 pm

1 stop5h 04m

$354

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 8/19

10:53 am-5:53 pm

2 stops8h 00m

Rapid City

Thu 9/3

11:22 am-4:34 pm

1 stop4h 12m

$359

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sun 7/5

1:38 pm-7:24 pm

1 stop6h 46m

Rapid City

Sat 7/11

6:00 am-12:11 pm

1 stop5h 11m

$360
Quickest round-trip

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sun 7/5

1:38 pm-5:12 pm

1 stop4h 34m

Rapid City

Sat 7/11

6:00 am-12:11 pm

1 stop5h 11m

$366

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Wed 7/8

5:10 am-9:19 am

1 stop5h 09m

Rapid City

Sat 7/11

6:00 am-12:11 pm

1 stop5h 11m

$369

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 9/11

11:01 am-9:23 pm

2 stops11h 22m

Rapid City

Mon 9/14

6:07 pm-12:27 am

1 stop5h 20m

$374

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 7/23

5:10 am-9:19 am

1 stop5h 09m

Rapid City

Mon 7/27

5:53 pm-11:57 pm

1 stop5h 04m

$379

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Rapid City from

How to get the cheapest flight ticket from St. Louis to Rapid City

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Rapid City?

What is the cheapest month to fly to Rapid City?

The month of February is, on average, the cheapest month to fly to Rapid City from St. Louis, with most prices found around $289. If you aren’t able to travel to Rapid City during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $293.

When to book flights from St. Louis to Rapid City

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Rapid City according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Rapid City (STL to RAP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Rapid City

Fastest flight time

4h 24m

Direct flights

None
The fastest flight from St. Louis to Rapid City takes 4h 24m
There are no direct flights from St. Louis to Rapid City. There are no popular flight routes from St. Louis to Rapid City.
Search flight deals

Frequently asked questions about flying from St. Louis to Rapid City

  • How far is Lambert-St Louis to Rapid City by plane?

    There are 772.0 mi between Lambert-St Louis and Rapid City. Flights usually cover this in 4h 24m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Rapid City Airport?

    Prices for flights from Lambert-St Louis Airport to Rapid City Airport were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Rapid City Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Rapid City Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Rapid City Airport.

  • What documentation or ID do you need to fly to Rapid City Airport?

    The necessary travel and health documents for your Rapid City Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Rapid City?

Best airlines flying from St. Louis to Rapid City

Compare and see reviews for airlines that fly from St. Louis to Rapid City with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $248Free CancellationRating
7.8
8,424 reviews
Search Delta flights
American AirlinesPriceFrom $248Free CancellationRating
7.1
11,745 reviews
Search American Airlines flights
United AirlinesPriceFrom $268Free CancellationRating
7.4
9,875 reviews
Search United Airlines flights

Traveling to a place near Rapid City?

Book flights to Rapid City if you plan to visit one of these locations
Deadwood
Keystone
Sturgis
Custer
Spearfish
Wall
Hill City
Hot Springs

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Rapid City?

It is quick and easy to find St. Louis to Rapid City flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Rapid City that suits you.

Can I find flights from St. Louis to Rapid City with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Rapid City flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Rapid City?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Rapid City.

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Of course. momondo tracks the price of St. Louis to Rapid City flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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