If you are asking about pilot base rotations... no. SEA does AMS/CDG/LHR consistently, (FCO/BCN/FRA for FO's occasionally). I believe DTW does FRA/MUC/AMS/CDG. ATL does pretty much all of Europe AMS/CDG/BCN/ATH/FRA/TLV etc.

If you are asking about where they depart from... BOS/ATL/DTW/MSP/SLC/LAX/SEA/PDX