A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
If you can do the trip so that your son's UM flights are all on the same carrier, it will be easier. Someone posted on FT several months ago about DL not accepting UMs if some Chinese partner airlines were involved because DL wasn't confident of the procedures.