via Athens by road
The drive down from Venizelos airport in Athens to the southern Peloponnese has been improved dramatically by the construction of the Athens ring-road and improvements to various segments of the motorway south of Corinth. If you are heading to Kalamata, this drive now takes less than three hours. It is another hour south to Kardamyli/Stoupa. Tolls will cost around 15 euros one way. At Tripolis, there is the option to turn off to head to Gythio to enter the Mani this way.
via Kalamata by air
Kalamata is an international airport- check your countries airlines and travel companies for details.
A taxi from the airport to Kardamyli/Stoupa is about 70 euros and takes just over an hour. The taxi rank always has drivers waiting for fares.