What is the cheapest month to fly from Rockford to Louisville?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Rockford (RFD) to Louisville (SDF), with fares starting from $192.

What is the lowest current fare from RFD to SDF?

The lowest currently-listed fare from Rockford (RFD) to Louisville (SDF) is $192 on 2026-09-10.

Is there a direct flight from Rockford to Louisville?

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

Cheap flights from Rockford to Louisville

Cheapest current fares: $192 in September 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 Louisville (SDF). Refreshed daily.

Rockford (RFD) → Louisville (SDF)

September 2026 $192
August 2026 $401

Frequently asked questions

What is the cheapest month to fly from Rockford to Louisville?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Rockford (RFD) to Louisville (SDF), with fares starting from $192.
What is the lowest current fare from RFD to SDF?

The lowest currently-listed fare from Rockford (RFD) to Louisville (SDF) is $192 on 2026-09-10.
Is there a direct flight from Rockford to Louisville?

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