KEF-HEL-SIN-SYD-AKL-DFW-BOS-ORD-SEA-JNU-SEA-BOS-MAD-MUC, PRG-HEL-KEF
I am Boston based, so really three trips here. Lots of trouble finding D class availability between Europe and SYD. Originally had to start KEF-LHR-BLR-SYD, but HEL-SIN opened up before I ticketed.