Check an extra bag: $480

Wow - now we know how British Airways is paying for the move to the new terminal at Heathrow. They’re charging up to 240 pounds ($480 at current exchange) for an extra checked bag - and the weight limit for the one you get is 23kg/50 lbs. You only get one carryon now at any British airport now too, so go light or go broke.

This policy takes effect in September. For the moment the highest extra bag fee is 120 pounds on long-haul flights.  

Once again, current developments are making light travel not just a wise option but an economic necessity.