The airport in Madurai is the nearest airport to Thekkady. Madurai airport is far away 136 km from here. The airport is well connected to major Indian cities like Chennai, Ahmedabad, Mumbai, Coimbatore, and Delhi. International flights are also operated from the Madurai airport.
If you find it difficult to find a flight to Madurai, then the Cochin Airport (Nedumbassery Airport) which is around 190 km from Thekkady is your next best option. The Cochin Airport is well connected with not only Indian cities but also with some international destinations as well, which include countries from the gulf. Once you reach the airport (either Madurai or Cochin), you can easily hire a cab or take a state transport bus to Thekkady.