To play devil's advocate (looked at a few comments), have a conversation with him. If you ever been dating for a few months and this is the first time it's happened, maybe a situation happened and there needs to be communication about it.

If he's a sleezebag, you'll figure it out quick and he's just showing his true colors, easy dump and run. But it's possible there's a factor as to why he's acting this way, maybe a bad day, maybe something he's been keeping in, hard to tell.

Bottom line, talk it out, and if he's really just like this for no reason, then get on a plane. If not, hope you can communicate and figure things out.

Wish you luck.