I think it should be. It is an industry where the weight of the goods is very closely tied to the cost, which isn’t really the case for car or train travel (obv

I think it should be. It is an industry where the weight of the goods is very closely tied to the cost, which isn’t really the case for car or train travel (obviously weight is a factor but 30 lbs plus or minus isn’t changing the cost to get you there by 10-20%). They already weigh your bags and charge you based on that (usually $30 for anything under 50 lbs and something like $70 for over 5o lbs). I think the backlash to them charging extra if you and your total bags comes in “overweight” would be too high to work. Even if people weren’t offended, you wouldn’t really be able to have a good idea how much extra you’d be hit with until you were at the gate. But if they did some sort of discount refund or maybe a voucher for future flights, that might work. Start weighing the checked bags and noting the exact weight (instead of just over-under 50 lbs) and then stepping on a scale with your carryon luggage (with no outward display) and totaling them. If you are under the average, you get a voucher credited to your account on a sliding scale by how much you are under. If you are over the average or you choose not to be weighed, nothing changes and you have only paid the full fare like normal.