There are a few stops on the way into Oxford city before
the bus terminal at Gloucester Green – stay on the bus
till you reach the terminal (unless you've arranged
accommodation yourself which is closer to an earlier stop).
For those staying in college accommodation, you will
probably need to take a taxi (walk through the alley on
the right of the shops and there's a taxi rank across the
square) Oxford, Keeble College.
If you're arriving into one of the other London airports you
should enquire at the Information Desk about the best way.
It will probably mean travelling into central London and taking either a train from Paddington Station or a bus
from Victoria Station.