Some of the destinations listed above, such as Mexico City, are no longer operated by the 747. I don't think I've missed any but based on the September/October schedule the destinations look like this...

AUS - Austin
BOS - Boston
ORD - Chicago
DFW - Dallas
DEN - Denver
LAS - Las Vegas
LAX - Los Angeles
MIA - Miami
JFK - New York
PHL - Philidelphia
PHX - Phoenix
SAN - San Diego
SFO - San Francisco
SEA - Seattle
YVR - Vancouver
IAD - Washington

KWI - Kuwait City
RUH - Riyadh

ACC - Accra
CPT - Cape Town
JNB - Johannesburg
LOS - Lagos
NBO - Nairobi

The winter schedule will come into action at the end of October and so someone may be able to advise better of what will be happening come December.