Originally Posted by blaggerman
Immigration preclearance saves time. Customs preclearance saves no time (it will actually add at least an hour to the min connection time in DUB) unless the passenger is connecting to another flight in the US. I can't imagine too many passengers connecting in DUB and again in the US.
I read a review from someone on the first BA flight between London City and New Nork via Shannon, and they said it knocked off 15 minutes from the usual Heathrow-JFK trip. The fact that the government went out of their way in arranging so many meetings with US senators and representatives to come to an agreement on CBP speaks for itself. As thick as our government is, why would they spend millions on putting full CBP in place for Dublin and Shannon if it has no benefits and adds at least an hour onto the journey as you claim? Sorry but what you're saying makes no sense...