How can they can compete against UA since UA doesnt fly JFK-LHR anymore?
No they don't, but effective October 1'st they do fly EWR-LHR using their new subsidiary Continental.
How can they can compete against UA since UA doesnt fly JFK-LHR anymore?
Yes, Mr Pedantic, we all know that. Anyone who's passed thru JFK has seen the downsized T8 instead of the much larger terminal that was part of the original design. Nevertheless, the building might be expanded.
When construction workers add square footage to a building, it typically results in "expansion" of the building, regardless of whether or not the additional space was part of the original design.