What is the cheapest month to fly from Rockford to Sioux Falls?

Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Rockford (RFD) to Sioux Falls (FSD), with fares starting from $345.

What is the lowest current fare from RFD to FSD?

The lowest currently-listed fare from Rockford (RFD) to Sioux Falls (FSD) is $345 on 2026-08-21.

Is there a direct flight from Rockford to Sioux Falls?

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

Cheap flights from Rockford to Sioux Falls

Cheapest current fares: $345 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 Rockford (RFD) to Sioux Falls (FSD). Refreshed daily.

Rockford (RFD) → Sioux Falls (FSD)

August 2026 $345

Frequently asked questions

What is the cheapest month to fly from Rockford to Sioux Falls?

Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Rockford (RFD) to Sioux Falls (FSD), with fares starting from $345.
What is the lowest current fare from RFD to FSD?

The lowest currently-listed fare from Rockford (RFD) to Sioux Falls (FSD) is $345 on 2026-08-21.
Is there a direct flight from Rockford to Sioux Falls?

There is currently no non-stop service from RFD to FSD. 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.