Originally Posted by
milepig
I’m on the SEA ORD red eye tonight (739) and in checking flight status I noticed that the bird arrives at 10:20 this morning. They leave a 739 apparently sitting around SEA for 13 hours. Is there some reason beyond they can’t fill it? There are all sorts of routes they can fit into those 13 hours.
SEA is a line maintenance station for United, so it's possible that work is scheduled during the aircraft's ground time. Besides that, aircraft in all fleets have extended ground sits every day throughout the system, especially at this time of year when demand is generally at its lowest.