Join Date: Mar 2004
Location: NYC, ROC, HNL, PEN, BKK, KUL, SIN (check out http://my.flightmemory.com/kkua)
Programs: DL Diamond charter member; 2 million miler (45% from NWA, 2MM achieved 5/2018)
Posts: 682
The most efficient would be AMS with only a MCT (minimum connecting time) of 50 minutes. Then followed by CDG because everything is under SkyTeam roof. The Heathrow connection involves arriving in LHR-4 and departing LHR-3. The MCT for this is usually 120 minutes, and my layover is 3 hrs.