How about if airlines instead offer a refund or voucher to scared white people who are afraid to share a flight with a brown person and decide to get off the plane?
It's not always white vs other. You can find this kind if fear in India (where you have violent clashes pretty frequently). Are you saying somehow Americans are better than other people and somehow therefore should be other than human? I know we should all strive to be better people. Looking at things along stark racial lines is not always helpful. Treating a subgroup of people as the Other is not particularly a "white" thing. It happens to all people --travel a bit. We should expect more from all people.
And the existence of racism on the other side of the planet does not somehow diminish or excuse or modulate how racism occurs in the USA.