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
Don't even think about transferring between LGA and JFK. From GRR, look at nonstops to DL hubs/gateways that have nonstops to NRT. My guess is that GRR-DTW-NRT-HKG or GRR-MSP-NRT-HKG will be your best choices. Two stops.