Originally Posted by
sailingfun
I would double check your accuracy on this statement. The great circle route does put you into Russian airspace and the Northern pacific winds often push the optimum route even further north and deeper into Russia.
Tweek the route on GC mapper to SFO-NRT-BKK and it is 70 nm longer and avoids Russia
I did a bunch of SFO-SIN we usually did not go that far North