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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
You can add low Y to a low C ticket without being charged more miles, but adding medium Y to a low C ticket normally results in DL adding the miles required for medium domestic coach to the miles for the international low BE.