Considering the Hotel Luxembourg in Thessaloniki?
A VT member wrote the following comment about visiting Thessaloniki:
InterCity / InterCity Express to Athens by skg-traveller
There are two daily services to and from Athens with InterCity Express trains. They're the best trains in Greece as they're fast and clean. The trip to Athens takes about 4 hours and 15 minutes and the train stops only in Larissa and Lianokladi stations. All ICE trains are air conditioned and have restaurants.
It costs about 48 euros for second class and 56 euros for first class.
There are also four InterCity trains to and from Athens. They're also fast (the trip takes about 4 hours and 45 minutes) but their quality isn't as good as with InterCity Express trains. They're also air conditioned and have restaurants.
The tickets cost about 35 euros for second class and 42 euros for first class.