One tradition, mentioned in the non-canonical Acts of Thomas, is that St Thomas was the apostle to India. Perhaps as a result of this writing, the indigenous church of Kerala has a tradition that St. Thomas sailed there to spread the Christian faith. He landed at the ancient port of Muziris then went to Palayoor, which was a Hindu priestly community at that time. He left Palayoor for the southern part of what is now Kerala State, where he established churches at Kodungallur, Kollam, Niranam, Nilackal (Chayal), Kokkamangalam, Kottakkayal (Paravoor), Palayoor (Chattukulangara) and Thiruvithancode Arappally.

Another tradition, mentioned by Origen in the third century is that Thomas was the apostle to the Parthians.

Neither of these traditions has any credible evidence to support it. We do not know where Thomas went.