You 're in Greece and wanna visit Larissa?
You can reach Larissa by three ways. Train, bus or car. Larissa is 354 klm from Athens by car it's about 3:45 hours, by bus or train is about 4 hours to 4 hours and 30 mins. From Thessaloniki is 156 klm by car and aproximately 1:20 hours, with bus is about 1:30 hours and by train it varies from 1:10 to 1:45 hours.
You can get a bus from Liosion bus station in Athens.
Athens to Larissa
Larissa to Athens
04:00 (except Saturday and Sunday)
17:00 D (only Friday and Sunday)
All buses have free wifi, D = double decker bus
More information at the official website http://www.ktellarisas.gr or call at 00302410567600
Larissis Train Station in Athens is the station where all trains depart and there you must go to get a train to Larissa. You can find the time tables for trains from Athens to Larissa in the official website where you can also book tickets on line.
Thessaloniki to Larissa
Larissa to Thessaloniki
**except Saturday and Sunday
All busses have free wifi visit htpp://www.ktellarisas.gr or call 00302410567600
For more information
Again if you would like to travel from Thessaloniki to Larissa by train you can visit the official website of OSE for timetables and ticket prices.