Originally Posted by
Wycombe
....a good few of those served from LGW before, of course.
Of course they were, at one point LGW offered more destinations to the USA than LHR did.
Of those routes mentioned by user _aax1 they were previously served from LGW by,
Cleveland (Continental)
Nashville (American)
New Orleans (British Airways)
Pittsburgh (British Airways, US Airways)
St. Louis (British Caledonian, TWA Trans World Airlines)