The intercity coaches (“KTEL” buses) are by far the most convenient way to travel around Greece, as well as for intra-regional travelling. The bus that needs 4 hours to connect directly from Athens.
There is frequent bus service from Athens Liossion Station to Volos, as well as from Thessaloniki bus terminal “Macedonia” to Volos. Volos is also connected with daily direct routes frm Patras, Ioannina, Larissa, Trikala, Karditsa, Kozani and from many more places in continental Greece via Larissa. Interurban Bus Terminal is opposite the Volos Info Center near the City Hall, the Railway Station and the Port, on a major hub.
For more information on KTEL: https://ktelvolou.gr/en/home/