Mojno li viejat iz Ameriki v drugyu stranu so student visa, F-1?

Если Виза F-1 НЕ просрочена в пасспорте и она многоразовая ( multi ) и если есть Виза в страну куда едете ( если только с Вашим паспортом виза в эту страну не требуеться ) - то да.
Алекс.

Yes, F1 is multiple entry, unless annonated in the visa (very rare, but sometimes. Usually you will see "M" which means multiple.)

ONE IMPORTANT NOTE!: You must get the back of your I-20 signed by your school before you leave. If you do not have a signed I-20 for re-entry, you will not be allow back! So that means you have to go to the international office before you leave. They usually want to see proof your will return, eg: roundtrip air tickets.

Copied from another public forum

Thanks