The KTEL buses from Athens to Nafplio are inexpensive (about €15), modern, comfortable, efficient and frequent, at least one per hour from the Kifisson Bus Terminal. The trip takes just over 2 hours.
Monday
06:15 (Z) - 08:00 - 09:30 - 10:30 - 11:30 - 12:30 - 14:00 (Z) - 15:30 - 16:30 - 17:30 - 18:30 - 20:00 - 21:30 (G)
Tuesday to Thursday
06:15 (Z) - 08:00 - 09:30 - 11:00 - 12:30 - 14:00 (Z) - 15:30 - 16:30 - 17:30 - 18:30 - 20:00 - 21:30 (G)
Friday
06:15 (Z) - 08:00 - 09:30 - 11:00 - 12:30 - 13:30 - 14:30 (Z) - 15:30 - 16:30 - 17:30 - 18:30 - 19:30 - 20:30 - 21:30 (Z)
Saturday
07:30 (Z) - 08:30 - 09:30 - 10:30 - 11:30 - 12:30 - 14:00 (Z) - 15:30 - 17:00 - 18:30 - 20:00 - 21:30 (Z)
Sunday and Holiday
07:30 (Z) - 09:00 - 10:30 - 12:00 - 13:30 - 15:00 (Z) - 16:30 - 17:30 - 18:30 - 19:30 - 21:00 - 22:30 (Z)