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Cheap flights from St. Louis to Rapid City from $203

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 6/10. 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
0 bags

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Find the cheapest flights from St. Louis to Rapid City

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
4:48 pm - 10:25 pm
STL
-
RAP
6h 37m
1 stop
United Airlines Logo
6:00 am - 12:07 pm
RAP
-
STL
5h 07m
1 stop
$329United Airlines
Wed, Jun 3 - Sat, Jun 6
Delta Logo
5:35 pm - 10:20 pm
STL
-
RAP
5h 45m
1 stop
Delta Logo
3:55 pm - 11:13 pm
RAP
-
STL
6h 18m
1 stop
$339Delta
Sat, Apr 25 - Wed, Apr 29
United Airlines Logo
6:00 am - 10:24 am
STL
-
RAP
5h 24m
1 stop
United Airlines Logo
6:00 am - 12:11 pm
RAP
-
STL
5h 11m
1 stop
$364United Airlines
Fri, May 29 - Sun, May 31
United Airlines Logo
9:00 am - 5:00 pm
STL
-
RAP
9h 00m
2 stops
United Airlines Logo
2:35 pm - 8:43 pm
RAP
-
STL
5h 08m
1 stop
$374United Airlines
Sat, May 9 - Sat, May 16
United Airlines Logo
6:30 am - 10:36 am
STL
-
RAP
5h 06m
1 stop
United Airlines Logo
8:25 am - 2:28 pm
RAP
-
STL
5h 03m
1 stop
$379United Airlines
Fri, Apr 24 - Sat, May 2
United Airlines Logo
11:15 am - 7:02 pm
STL
-
RAP
8h 47m
2 stops
United Airlines Logo
7:00 am - 1:08 pm
RAP
-
STL
5h 08m
1 stop
$380United Airlines
Sat, Apr 25 - Wed, Apr 29
United Airlines Logo
8:54 am - 1:08 pm
STL
-
RAP
5h 14m
1 stop
United Airlines Logo
1:00 pm - 10:45 pm
RAP
-
STL
8h 45m
2 stops
$384United Airlines
Fri, Apr 24 - Sat, May 2
American Airlines Logo
5:20 am - 12:38 pm
STL
-
RAP
8h 18m
1 stop
American Airlines Logo
11:53 am - 7:33 pm
RAP
-
STL
6h 40m
1 stop
$389American Airlines
Thu, Apr 23 - Sat, Apr 25
United Airlines Logo
1:18 pm - 6:24 pm
STL
-
RAP
6h 06m
1 stop
United Airlines Logo
1:33 pm - 9:22 pm
RAP
-
STL
6h 49m
1 stop
$409United Airlines
Tue, Aug 25 - Sat, Aug 29
United Airlines Logo
1:18 pm - 10:23 pm
STL
-
RAP
10h 05m
2 stops
United Airlines Logo
1:33 pm - 9:22 pm
RAP
-
STL
6h 49m
1 stop
$414United Airlines
Tue, Aug 25 - Sat, Aug 29

United Airlines flights from St. Louis to Rapid City

Our best United Airlines deals on St. Louis to Rapid City flight tickets
United Airlines
Jun 3
STL4:48 pmLambert-St Louis
6h 37m
1 stop
RAP10:25 pmRapid City
Jun 6
RAP6:00 amRapid City
5h 07m
1 stop
STL12:07 pmLambert-St Louis
$329
United Airlines
May 29
STL6:00 amLambert-St Louis
5h 24m
1 stop
RAP10:24 amRapid City
May 31
RAP6:00 amRapid City
5h 11m
1 stop
STL12:11 pmLambert-St Louis
$364
United Airlines
May 9
STL9:00 amLambert-St Louis
9h 00m
2 stops
RAP5:00 pmRapid City
May 16
RAP2:35 pmRapid City
5h 08m
1 stop
STL8:43 pmLambert-St Louis
$374

American Airlines flights from St. Louis to Rapid City

Our best American Airlines deals on St. Louis to Rapid City flight tickets
American Airlines
Apr 23
STL5:20 amLambert-St Louis
8h 18m
1 stop
RAP12:38 pmRapid City
Apr 25
RAP11:53 amRapid City
6h 40m
1 stop
STL7:33 pmLambert-St Louis
$389
American Airlines
Apr 14
STL3:38 pmLambert-St Louis
7h 20m
1 stop
RAP9:58 pmRapid City
Apr 20
RAP1:08 pmRapid City
5h 22m
1 stop
STL7:30 pmLambert-St Louis
$434
American Airlines
Aug 3
STL6:00 amLambert-St Louis
6h 14m
1 stop
RAP11:14 amRapid City
Aug 7
RAP6:10 pmRapid City
4h 41m
1 stop
STL11:51 pmLambert-St Louis
$489

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 April 13, 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

Wed 6/3

4:48 pm-10:25 pm

1 stop6h 37m

Rapid City

Sat 6/6

6:00 am-12:07 pm

1 stop5h 07m

$329

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 4/25

5:35 pm-10:20 pm

1 stop5h 45m

Rapid City

Wed 4/29

3:55 pm-11:13 pm

1 stop6h 18m

$339

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 5/29

6:00 am-10:24 am

1 stop5h 24m

Rapid City

Sun 5/31

6:00 am-12:11 pm

1 stop5h 11m

$364

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 5/9

9:00 am-5:00 pm

2 stops9h 00m

Rapid City

Sat 5/16

2:35 pm-8:43 pm

1 stop5h 08m

$374
Quickest round-trip

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 4/24

6:30 am-10:36 am

1 stop5h 06m

Rapid City

Sat 5/2

8:25 am-2:28 pm

1 stop5h 03m

$379

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Sat 4/25

11:15 am-7:02 pm

2 stops8h 47m

Rapid City

Wed 4/29

7:00 am-1:08 pm

1 stop5h 08m

$380

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Fri 4/24

8:54 am-1:08 pm

1 stop5h 14m

Rapid City

Sat 5/2

1:00 pm-10:45 pm

2 stops8h 45m

$384

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Thu 4/23

5:20 am-12:38 pm

1 stop8h 18m

Rapid City

Sat 4/25

11:53 am-7:33 pm

1 stop6h 40m

$389

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 8/25

1:18 pm-6:24 pm

1 stop6h 06m

Rapid City

Sat 8/29

1:33 pm-9:22 pm

1 stop6h 49m

$409

St. LouisRapid City

STL - RAP

STLRAP

Lambert-St Louis

Tue 8/25

1:18 pm-10:23 pm

2 stops10h 05m

Rapid City

Sat 8/29

1:33 pm-9:22 pm

1 stop6h 49m

$414

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.

How far in advance should I book a flight to Rapid City?

You are more likely to see cheaper flights to Rapid City from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Rapid City for around $361 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Rapid City from St. Louis for as low as $279 on momondo.

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 57m

Direct flights

None
The fastest flight from St. Louis to Rapid City takes 4h 57m
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 57m, 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
7.9
8,406 reviews
Search Delta flights
American AirlinesPriceFrom $248Free CancellationRating
7.1
11,569 reviews
Search American Airlines flights
United AirlinesPriceFrom $253Free CancellationRating
7.4
9,579 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
Hill City
Hot Springs
Wall

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.

I’m not ready to book a flight from St. Louis to Rapid City right now. Can momondo alert me if prices change?

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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