Originally Posted by
Viajero
I think the OP is saying that a fully booked 10 month long trip can only be booked 2 months before first flight; in that sense he's right.
True, but it would still be possible to book each individual flight 330 days out. So there should be no issues with A availability at short notice. (Unless you would need to make last minute changes)
Flights for christmas can easily booked now, and A availability shouldn't be a problem.