If you are thinking seriously about going, don't wait. Seniority is everything in airline work. Everything. A year from now the hiring may stop. I know you don't think so, but a recession could change the whole picture. If you had a year's seniority a year from now and there were furloughs, you might find yourself a month on the job and then laid off. Not trying to win an argument with you. Just sketching a possible scenario. If you are planning on going, don't wait. Don't.