Originally Posted by
gardengirl
Is it the difference of our US airports with Concourses as opposed to Heathrow with Terminals?
Not really. LHR is just a big spread out place with different terminals being built and rebuilt at different times, for different airlines.
In the US: LAX has multiple terminals that aren't connected airside. So does JFK, and LGA. ORD's international terminal is a completely separate building from the primary domestic terminals. DCA has multiple concourses that are not connected behind security (although all in the same building). There are other examples.