The way I understand it is that they can offer any amount they want to get volunteers. But if they want to involuntarily bump someone, they have to pay at leas

The way I understand it is that they can offer any amount they want to get volunteers. But if they want to involuntarily bump someone, they have to pay at least four times the one-way fare that passenger paid, up to $1,350. So bumping the person that paid the least for their ticket would mean they have to pay them the least.