Originally Posted by
docbert
Based on gcmap.com,
SFO-LHR or SFO-HKG are both within range of ETOPS 90 (ie, never more than 90 minutes from a suitable landing site).
Those aren't really polar routes. EWR-PEK (which I flew last year, on a UA 777) is an example of a polar route. Not ETOPS 90 or even 120, unless you deviate significantly from the great circle route.