Is there a standardized rate for excess baggage with all international carriers for international travel? Or is the rate flexible on carrier/sector/booking class etc? How do airlines calculate the amount, and do they calculate the whole amount (i.e. often airlines are liberal, but if someone has excess luggage, will every singly Kilo be calculated, or is there some more liberal regime).
Is it possible to receive a waiver if Airlines are contacted well in advance..
In this particular case, a friend of mine is tavelling GF DEL-LHR and wants to know the rate he would have to pay at the airport for his excess luggage.. any information on this is highly appreciated!