Re the Concorde, these were the actual tax costs quoted for Joh and I on our roundtrip in JUNE.
Britain then (as now presumably) regarded a legal "stopover" as one that exceeds 24 hours. Concorde departed (then) LHR at 10.30am. Taxes per person on these tickets were $A94.40 as we cunningly gave ourselves 23.15 hours sleep/party time at LHR airport Hotel. Had our 'stay' in Britain exceeded 24 hours the taxes were $A361.60 a person. So, by arranging a short transit each direction
we saved $A534.40 or about $US280 in taxes alone on the exact same flights! The point 'cost' to fly JFK-LHR is the same as JFK-LHR-to anywhere else close in Europe that BA flies, and thus cuts a huge sum off taxes. (And takes you somewhere more interesting than London to boot!)
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Glen ~
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