Originally Posted by Leezyjet
So if pax A turns up with 50kgs excess bagagge, it isn't costing the airline any more to carry it as the fuel has already been planned in most instances and this is also offset by the fact that pax B,C,D or E might have less than the allowance anyway.
So not talking bollocks at all. After nearly 10 years of load planning flights, I have a good idea how the system works.
Yes you are. Regardless of whether the fuel was planned or not, basic physics shows that fuel is burnt to carry weight. So your extra 5 Kgs of baggage does have a cost. It may not affect the already planned fuel, but the unburnt fuel not used is cumulative across all the pax with the extra 5 Kgs and will eventually reduce the fuel uplift needed for a future sector. Conversly, burning extra fuel for you 5 Kgs must at some point in the future increase the fuel uplift required.