What did he do after he got off the plane? Well, I guess that would depend on whether there was someone there to meet him, and a whole bunch of other factors, wouldn't it? If he got on knowing he didn't have his wallet, one would have to assume he had in mind something to do about it when he arrived at his destination....otherwise, why would he even go there?

The whole thing sounds like a moderately good premise for a comedy film, actually....as a way of starting it off.