Originally Posted by
carsnoceans
Based on above, upgrade should cost carrier surcharge difference for two segments should be $280 (for one person). However, BA agent says $560. This leads me to believe, they are calculating surcharge on entire trip (aka all 4 sectors, not just the two specific sectors with availability at present.
Whether i will be required to pay a surcharge again, when CW availability opens for other two segements (ie, LAx-lhr, del-lhr) - is the big question.
Try another call centre, e.g. UK. You should be paying around $280 if you UuA a LHR-DEL leg and LHR-LAX leg.
If you UuA any additional legs beyond those two you will pay the extra surcharge per leg.