Originally Posted by
14940674
A passenger's luggage does not reach the airline until CBP has processed the passenger, so the airline will not have to offload the bags of tardy passengers.
All U.S. airport gates can accommodate domestic arrivals. Domestic baggage claim could become more congested, but gate space would not be a constraint on preclearance flights.
The luggage in Dublin and Shannon is already in the airline's control when the pax is shown a photo of it. Do you mean no baggage is loaded onto the aircraft until the final passenger has been screened onto the airplane. Iirc BA1 passengers have a suboptimal routing through terminal 7 in JFK prior to being released. Would it be possible to route all LHR originating passengers that way? Given the higher level of non VWP pax through LHR, connecting times might need to increase for those flights to take account of the additional processes.