Where was Jesus before he went to Galilee in John 1:43?
The next day Jesus decided to go to Galilee. (John 1:43a, ESV)
In 1:35, Jesus was near John the Baptist. In 1:37, the two disciples follow Jesus to where he is staying. In 2:42, Jesus spoke to Peter.
Jesus went to Galilee.
Jesus called Philip. Philip was from Bethsaida (a town on the northern shores of Galilee), the city that Andrew and Peter were from (John 1:44).
Another way to ask the same question is, "Where did Jesus talk to Peter before 1:43?" Watching a Gospel of John film is what brought this up. The movie had Andrew meeting Peter when he landed a boat from a lake. The lake in that area with fish was the Sea of Galilee.