We are going to Vancouver and San Francisco this summer to see friends and are just about to buy our flights. Should we pay extra to fly direct and non-stop or is for eg a 4 hour stop over in Chicago a welcome break? The kids will be nearly 5 and nearly 2 when we fly and we are not forking out for an extra seat for the little un. And if you had the choice between BA and United - who would you fly with? Unfortunately we will be flying in the cheap seats...