Cheap Flights from St Louis to Rapid City Regional

Compare St Louis to Rapid City Regional flight deals

Find the cheapest month or even day of the year to fly to Rapid City Regional

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Flight deals from St Louis Airport to Rapid City Regional Airport

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Rapid City Regional Airport? If you want to travel next month, return fares start from R 4,689. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Rapid City Regional

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Rapid City Regional flights are currently cheapest in March.

St Louis to Rapid City Regional: Alternative routes

Compare routes from St Louis to Rapid City below. You may find an airport to fly into that's cheaper, faster, or easier than Rapid City Regional.

St Louis to Rapid City: Flight information

The things to know before you go.
Cheapest flight foundR 3,430
Cheapest month to flyMarch

Finding cheap flights from St Louis to Rapid City Regional: Frequently asked questions

The best price we found for a return flight from St Louis to Rapid City Regional is R 4,689. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Rapid City Regional. But we found flights with one or more stops from R 4,689.
As of March 2026, there are no flights flying from St Louis to Rapid City Regional.
The cheapest month to fly from St Louis to Rapid City Regional is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Rapid City Regional Airport on Wednesday, 22 April 2026.
No airlines currently offer direct flights between St Louis Airport and Rapid City Regional Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Rapid City Regional but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Rapid City is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, American Airlines offers the cheapest flight tickets to Rapid City Regional.

Travelling from Lambert-St. Louis International Airport (STL) to Rapid City Regional Airport (RAP): what you need to know

  • Leave enough time to catch your STL to RAP flight. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.

  • During popular months like July, you'll want to get to the airport well in advance. Arrive two hours before domestic departures and four hours ahead for an international flight when you fly during a high season in general.

  • Think about adding a stopover when booking your ticket from Lambert-St. Louis International Airport to Rapid City Regional Airport. Simply uncheck 'Direct flights only' to break up your journey, or perhaps see a new city along the way. Here's where you can stop between STL and RAP:

    • Minneapolis-St. Paul International Airport

    • Denver International Airport

    • O'Hare International Airport

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Rapid City Regional Airport (RAP)

  • R 3,430 is currently the best price for a one-way Lambert-St. Louis International Airport to Rapid City Regional Airport flight. A return flight starts at R 4,689. These prices may change depending on availability.

  • Don't wait until the last moment. You're more likely to find cheap tickets from STL to RAP if you book ahead. Airlines often offer some amazing early bird rates.

  • The 'Whole month' search tool shows you the cheapest flights from Lambert-St. Louis International Airport to Rapid City Regional Airport across the entire month. It's an easy way to find a bargain if your travel plans aren't set in stone.

  • You don't need to check back in every day to find out if fares have gone down when you create a Price Alert. We'll let you know the moment the price changes on cheap flights from STL to RAP.

  • Tailor your flights with filters. Choose your ideal arrival and departure times, total journey duration and airlines. You can also sort the results by 'Fastest,' 'Cheapest' or 'Best' flights from Lambert-St. Louis International Airport to Rapid City Regional Airport.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Rapid City Regional Airport (RAP)

  • Consider staying at La Quinta Inn & Suites by Wyndham Rapid City after your Lambert-St. Louis International Airport to Rapid City Regional Airport flight. It's only a short drive from RAP and a comfortable option if you'd like to get some rest right away.

  • Grab a Rapid City Regional Airport rental car and explore Rapid City and beyond with your own wheels. Avis, Alamo and Enterprise are top outlets to choose from here.

  • To secure the best deal, reserve your vehicle from Rapid City Regional Airport at least a couple of weeks ahead. Prices typically go up closer to the day of travel.

Getting from Rapid City Regional Airport (RAP) to central Rapid City

  • The street address for RAP is 4550 Terminal Road, Suite 102.

  • Rapid City Regional Airport is roughly 18 kilometres from the centre of Rapid City. The drive time takes around 20 minutes.

When to fly to Rapid City Regional Airport (RAP)

  • August is the most popular month for flights from Lambert-St. Louis International Airport to Rapid City Regional Airport. For a quieter experience, go to Rapid City in February.

  • Lock in your flight from Lambert-St. Louis International Airport to Rapid City Regional Airport for July if you'd like to go to Rapid City during its warmest month. Expect temperatures of between 14ºC (57ºF) and 32ºC (90ºF).

  • If you'd rather travel in cooler conditions, search for a cheap ticket from STL to RAP in February. Average temperatures are between -16ºC (3ºF) and 7ºC (45ºF) then.

Explore more of United States

  • Fort Collins is just one of the many cities in United States waiting to be explored after you've seen Rapid City. Around 418 kilometres away to the south, its best attractions include Jack Lantern's Northern Colorado Corn Maze, Fort Collins Country Club and State Fort Collins.

  • Thornton is another essential stop in United States and is around 483 kilometres south of Rapid City. No trip is complete without experiencing Margaret W Carpenter Recreation Centre, Thorncreek Golf Course and Avaya.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.