Originally Posted by
GinFizz
Indeed it could be a tidy sum.
DFW-LHR: 4750 miles
LHR-DXB: 3421 miles
Fractional mileage of downgraded sector (LHR-DFW) = 4750 / ((4750+3421)*2) = 0.29
Reimbursement = 0.75 * 0.29 * (8000 - taxes/fees) {USD}
Taxes/fees = 1600 USD (approx; based on current "A" fare of 8128 USD for this route on BA stock)
So amount due = 0.21 * 6400 = 1344 USD.
I did the same calculation but with lower taxes as I did not include YQ in taxes, as that is a carrier surcharge ($1410 in F) and in my opinion should be refunded proportionally. But your calculations stand just fine, as a minimum in my opinion. Hence my figure of $1750.