Originally Posted by
San Gottardo
For departures they may. Also to use the DL Lounge. Not unheard of that in the US planes arrive at one terminal (with CBP) and then get towed to another for departure. Look at Chicago for instance (all international arrivals in T5, but AA and UA and LH départ from other terminals). Or some flights at SFO (Alaska Airlines from/to Mexico). Etc.
Being able to use the Delta Club would be nice, the old Virgin Clubhouse that AF uses isn't even open right now and even when it was, it was gloomy and had bad food.