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: 100,368
If you use pay with miles for any part of a ticket, no matter how small, you WILL NOT earn any miles on the ticket. If you are FO, it will not be eligible for a "domestic" upgrade. (These are treated as award tickets, even if you use miles to reduce the price by just a little bit.)