Home to pretty treasures, Bielsko-biala is Poland's best kept secret. A gripping city on its own right, Krakow also deserves a visit. Attractions in Krakow include Main Market Square, Wawel Royal Castle, St Marys Basilica. Also, to reach Bielsko-biala, you'll have to take a flight to Krakow; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. Popular vacation packages of Bielsko-biala are of 1-2 days.
Yes,it is that simple really! Enjoy your trip! Keep travelling!