I'm doing some searching for milage availability, am I right in thinking the only way to do it is book my miles on the VA site, and if I click dates and anytime within 5 weeks and nothing comes back then that means there's nothing available? However I should keep checking in case something comes up!
In theory, you are correct. But it can sometimes be worth calling FC; I recently needed to change a reward flight from Atlanta to come back from Miami and the online search showed no PE for the Saturday I wanted but FC were able to do it for me, and refunded 20k miles as we were now coming back before peak season started.
Maybe a change is different to a new booking?