Originally Posted by
kranabargar
UA 922 on 8/29 suffered almost 10 hour delay. The EWR to LHR morning flight became a night flight yet again. This seems to be a fairly common occurrence. UA web site says reason is delayed inbound flight, but I don't buy that - inbound arrived 39 minutes early (which was still hours after 922 was scheduled to depart).
I'm assuming you are talking UA922 departing on August 28th, not the 29th. Today's flight left on time (ish) and is en-route.
The delayed flight was originally supposed to use aircraft N647UA. N647UA must have a mechanical issue because according to flightaware it's been at EWR with the 24th. It was swapped to N646UA which is why the flight status shows the "inbound" flight arriving early but after the original departure time.
United's flights to London cannot land after 23:30. If this flight is delayed and cannot arrive prior to the night curfew it has to wait, hence the long delay. N646UA arrived into EWR at 13:36 which was to late to depart and arrive before the curfew.