Originally Posted by
Clarkcc1
You do realize that if you connect in LHR you don't pay the tax right?? It is only if your outbound LHR-XXX doesn't start with YYY-LHR on the same itinerary.
Not true; there's quite a hefty connecting tax at LHR.
If you connect in LHR vs. going nonstop, you pay $82.70 in extra taxes on a roundtrip with the same base fare, no matter what class you fly in. It's called the United Kingdom Passenger Service Charge (UB). Plus, of course, you're transiting in connecting-hell LHR, the only airport in the world that makes you queue twice on a connection.
Source:
http://matrix.itasoftware.com/