Changing Planes in London
The two principal airports for London are Heathrow and Gatwick Airports. British Airways' flights from U.S. arrive into and depart from Heathrow (Terminal 4) or Gatwick (North Terminal) - see U.S. cities with (H) or (G) in tables for British Airways. To change terminals between Gatwick and Heathrow Airports, allow a minimum of three hours to transfer (cost of airport transfer is not included in airfare).
Passengers traveling to Ireland or Scotland via London depart from Heathrow's Terminal 1. To transfer between Heathrow's Terminals 1 and 4, take a free shuttle bus and allow one hour.