I've been playing around with the GCM and the *A .pdf timetable, as well as with the 'Flight Search' and 'Destinations' tools on the *A website.
It looks to me like NRT-YVR (4674) is the shortest *A non-stop trans-Pac. Yes? NRT-HNL-SFO (3819+2399=6218) breaks it up. Is there a shorter two-flight solution? ANC would be a good stopping point but there aren't any flights coming into ANC from the west. Is there any three-flight routing where the longest leg is less than 3819?
Similarly, I found LHR-YHZ (2857) as the shortest *A trans-Lant. Anything else? There don't even seem to be any likely stops between Europe and the east coast of North America: KEF is actually out of the way, and in any case there's no service (on *A) between there and NA.
Natal in Brazil (NAT) and Dakar (DKR) are both *A cities and the GCM distance is only 1870, but somehow I don't think that route is coming any time soon -- the Flight Search tool can't even construct an itinerary with connections!
Sunday morning musings...
cheers,
Henry