We had a strange experience on UA 294 yesterday from SEA to SFO. The passengers were all boarded and then the captain announced that we had to wait to have 9,000 lbs of fuel removed, because the plane was originally intended to fly to IAD. We sat on the plane for about 30 minutes before the fuel truck arrived. We almost missed our connecting flight and many others had tight connections well.

It amazes me that United didn't realize the fuel needed to be removed sooner and take action to preclude disrupting connections.