So in the last arc of Action Comics, before the reboot, Lex goes batshit again and gains ultimate power. He sucks Supes through some dimensional portal to a Phantom Zone doorway 6500 Ly from Earth.
Back at the Sun, the other Supers throw down with Doomsday. During that two minute interval and after beating Lex up, Kal rushes back to Earth.
Basically, Supes crossed 6500 Ly in two minutes.
6500(60*60*24*365)=204,984,000,000 light-seconds.
204984000000/(60*2)=1,708,200,000c
Kinda just to corroborate my earlier calc.
