I have been canceled due to "Air traffic control" AKA Fog twice. I had to drive to my destination of Redding CA upon arrival and upon departure was held or delayed one hour so in turn missed my connection. Now I have to fly from SFO to Chicago and then home to Dallas. RED EYE.....No apology, I am very disappointed with customer service and I will NEVER choose this airline ever again. I do fly weekly for work - normally Southwest. United does not hold a candle to SWA. You stink and you can keep it. I'll never fly you again!