If I use a GUF2 via TA to upgrade a return trip LHR-LAS in CW to F, will I have to pay any extra taxes or surcharges? On the BA calculator it is higher for first...
you pay the same extra taxes/fees/charges that you would do if applying the GUF with ba directly. Having said that a LHR-LAS rtn should have the same taxes/fees/charges in CW and F so you should have to pay much if anything for that upgrade. Where are you seeing higher TFC in F?