If you can find a network that uses the same LTE bands, it's possible. But Verizon uses different bands than pretty much anyone else. Then you've got the whole CDMA part of the phone that kicks in when you don't have LTE coverage, and that's not going to work out at all since pretty much any other carrier around the world that has LTE will have GSM for 3G, not CDMA. And even if they have CDMA, it's pretty safe to say that you won't get it working.
So, unless you knew exactly what you're getting into, I'd say that you probably shouldn't count on it.