American Airlines said yesterday it will add four flights to London in a shift to London Heathrow Airport from Gatwick Airport.

American, the largest US carrier, said it would operate up to 20 daily round trips between the United States and London, including a new route between New York and London's Stansted Airport beginning on October 28.

The airline currently has 16 daily roundtrip flights to London, and three to Gatwick.

American said it would fly to Heathrow from Dallas and Raleigh-Durham, North Carolina, starting in March 2008. It will keep one Dallas-Gatwick flight.