Q: I need to know what time to book my return ticket home my interview at the embassy is at 9.30am.
A: Do not know which US embassy you are meaning. Or what the interview is for. I went down to London recently to the US Embassy there for a visa interview. I was there about 3 hours all told. As it had been a few years since I had been to London, I booked one of the short breaks. Got 2 nights B&B(hotel was only 15 ins walk from the embassy), return train fair, river cruise with dinner on board. Far better than all the rush of trying to do it all in one day.