I may have mentioned coming back through JFK … my wife and I were chatting about the very long walk we had to get to our gate. I think that was my longest walk in any airport.
However, if you come into ATL in Terminal E from out of the US, that also is a long walk as Customs is only in Terminal F and you can’t access the Plane Train.
Haneda had a long walk too. We had to retrieve our luggage at JFK and recheck it. That is normal I guess.