What is the cheapest month to fly from Saint Louis to Rapid City?

Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Saint Louis (STL) to Rapid City (RAP), with fares starting from $391.

What is the lowest current fare from STL to RAP?

The lowest currently-listed fare from Saint Louis (STL) to Rapid City (RAP) is $391 on 2026-08-21.

Is there a direct flight from Saint Louis to Rapid City?

There is currently no non-stop service from STL to RAP. Most travellers connect through a hub airport. See our route page for current stopover options.

Cheap flights from Saint Louis to Rapid City

Cheapest current fares: $391 in August 2026 on connecting flights.

Last updated August 11, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Saint Louis (STL) to Rapid City (RAP). Refreshed daily.

Saint Louis (STL) → Rapid City (RAP)

August 2026 $391

Frequently asked questions

What is the cheapest month to fly from Saint Louis to Rapid City?

Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Saint Louis (STL) to Rapid City (RAP), with fares starting from $391.
What is the lowest current fare from STL to RAP?

The lowest currently-listed fare from Saint Louis (STL) to Rapid City (RAP) is $391 on 2026-08-21.
Is there a direct flight from Saint Louis to Rapid City?

There is currently no non-stop service from STL to RAP. Most travellers connect through a hub airport. See our route page for current stopover options.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.