Originally Posted by
SFGuy37
I can’t use the SWU on a Y miles booking, and booking in J with miles is about 100K miles plus ex-LHR taxes of about $300 so not as good a return
If you fly from LHR (or most UK airports) in J you will pay the increased
UK APD no not matter if an award, upgrade or cash ticket. So ex LHR/UK real taxes are not part of equation. The BA/AA award surcharges are not taxes.