We're looking to fly out to SFO in September/October time in business class to use up the 75k miles we've built up over the last couple of years before it goes over to BA.

I've got that KVS tool but not finding anything. We're going from MAN originally but I've been looking from FRA because tax is more here I believe?

I've literally gone through all of September and half of October looking for a single seat and not found anything. I've found a few in March time so I don't know if it's because availability isn't released yet or if it's all gone?

If people can suggest alternative routings etc. I don't mind doing the legwork with the KVS tool, we're happy to fly to somewhere in Europe first but would probably be fine booking from a UK airport too if needs be.