Hi,
Is this correct: I would like to travel to Boston, MA, and while I'm there visit my family.
Is it correct to put another comma after the city abbreviation? In examples like this, commas before and after the MA are often omitted. Really, they should both be there. In fact, I'd say that, for good writing, you should say 'Maine' in full rather than the postal abbreviation.
In addition, you should put commas before and after the phrase 'while I'm there'. If you want to avoid so many commas, you could move the phrase to after the word 'family'. It reads better that way.
I would like to travel to Boston, MA, and visit my family while I'm there.
Best wishes, Clive