Home to pretty treasures, Volos is Greece's best kept secret. A gripping city on its own right, Delphi also deserves a visit. Delphi is bestowed with interesting set of attractions like Ruins Of Delphi, Delphi Archaeological Museum, Mount Parnassus. Also, to reach Volos, you'll have to take a flight to Delphi; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. A holiday in Volos can generally be of 1-2 days.
Yes,it is that simple really! Enjoy your trip! Keep travelling!