Originally Posted by
mec72
LHR-SNN-JFK would have zero appeal for me.
It wouldn't be via SNN - the only reason it currently goes that way is because the A318 can't get out of LCY with a full enough fuel tank to make it over the Atlantic. As some have mentioned, the benefit of the pre-clearance is minimal for frequent travellers who have Global Entry, and now most ESTA-users also have a much faster experience. At some point there is talk of adding a pre-clearance area at LHR (either T5C or when they get round to building it, T5D/T3A), which coupled with Crossrail, will kill off CWLCY for good, if that hasn't already done the job.