If you can get the dates you want at that price (I'm assuming £800 each? then I would say book them now, the reward flight and mile + money options go quite quickly especially for school holidays. You would be looking at that price for economy at least any time during the school holidays. We fly PE now as the legroom in economy just doesnt work for hubby with bad back and knees and as he has to drive the other end it is better to pay more and be comfortable we have found.