I had figured that was what this was for:

U.S. - London
Award: Bonus miles
Dates: Travel between June 1, 2001 - August 15, 2001
Restrictions: US/Canada members only
Earn DOUBLE MILES when you fly round-trip to London on either AA or TWA! Just travel between June 1, 2001 and August 15, 2001, on a full-fare ticket (booked in F, J, Y, D or B) and you can earn double miles from AA or TWA's U.S. gateway cities to London Heathrow or Gatwick. To qualify, you must register prior to travel. Click LONDB to register.


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