Travel Outside the U.S. While on OPT – Can I re-enter the U.S.?
1. If your OPT application is pending and your I-20 has expired, it is not recommended to travel outside the U.S. Your re-entry may be denied. If you decide to travel, make sure that you take I-797 receipt notice.
2. If your OPT application is approved (and you have your EAD card), but [...]