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

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Rockford (RFD) to Louisville (SDF), with fares starting from $151.

What is the lowest current fare from RFD to SDF?

The lowest currently-listed fare from Rockford (RFD) to Louisville (SDF) is $151 on 2026-05-30.

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: $151 in May 2026 on connecting flights.

Last updated May 26, 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)

May 2026 $151
June 2026 $171

Frequently asked questions

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

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Rockford (RFD) to Louisville (SDF), with fares starting from $151.
What is the lowest current fare from RFD to SDF?

The lowest currently-listed fare from Rockford (RFD) to Louisville (SDF) is $151 on 2026-05-30.
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.