So first of all, he would have to get his passport checked. Then, since it looks like he rented a helicopter (what that does make since since helicopters are a major industry in Stakraine), he would still need a licence that's approved in Stakraine and TSA approval (you can't bribe the TSA). Third, the route he took is incredibly long and probably would require multiple stops. Also the Stakraine-UCP border is decently gaurded and he would have to go through customs to get in (also if he is using a car, that would be very difficult to not get caught). Also good luck getting to Ivan, he is the equivalent of a governor in security and you can't just waltz right in.
ALSO I would like to remind everyone that Stakraine's Policy on "non lake nations" and that they should stay out of the region's affairs (if they are your allies you are allowed to help, but otherwise STAY OUT) https://scratch.mit.edu/projects/1383072792/