I'll be arriving at STN on a KL flight at 9:30 AM and I am booked on a separate ticket to depart at 2:00pm. There is an earlier flight out at 10:40am and maybe others that I would like to get on if they let me. Can one transit STN without arriving, i.e. get off the incoming and find a transit desk to check in for the next flight and hope to be placed on an earlier one? If so, how much time is estimated based on this airport's layout and size?