Originally Posted by terenz
If I am not mistaken, all the U.S. airlines (other than AA) using LGW generally use a remote satellite in the South terminal, and arriving/departing pax are not segregated. In such a case, she could always wait in the gate area IF your flight is scheduled to arrive (or at least leave from) that satellite, and you aren't concerned about your bags.
Delta and AA use the north terminal
Continental use pier 2 (gates 11-30) south terminal
Northwest use pier 3 Satellite (gates 31-38) south terminal
US use a mix of piers 2 and 3 south terminal
You cant wait in the Satellite as an arriving passenger