Next month I have a flight out of Heathrow T3 at 11.30am. Due to where I live, I'm going to have to travel down the night before. The latest I'm going to be able to arrive is about 3am - 8 and a half hours before my flight. Is this too long to be hanging around? What time will I be able to start checking in?
I'm basically trying to work out if waiting in the airport for that long is a realistic option, or if I need to be booking a hotel instead.