Actually my irregular ops experience with WN is hands down much better than US. In fact, in 1 day, 12 hrs. at the airport, 10 due to US (and still waiting for a refund 2 mos. later). I bought a WN ticket, then weather came in, I decided to change to the next day, no problem, which flight would you like....no there are no fees, anything else we can do for you.....words US doesn't understand anymore.