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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: 100,403
Sometimes a cheap RT in business class costs less that one way in business class and the other direction in premium economy on the same flights for the same dates.
Also, some airlines offer RT award tickets that cost fewer miles than two OWs etc.