LHR-SFO is supplemented by LGW-OAK (and LGW-SJC)
LAS I believe but I haven't kept up to date with that route.
Don't forget LHR-EWR and LCY-JFK to add to LHR/LGW-JFK.
LHR-YYZ, DME, MIA (and LGW-FLL), IAH, PHX, PHL, HND/NRT, PVG, SIN, BOM, DEL, MAA?, SEA (and YVR but that's a bit of a trek from SEA) are others