Hi...new to the forum and VisaJourney has been an immense help in our endeavor!!! My wife is here in the US, she came from the Philippines on a K-1 Visa, we recently got married and have filed all the papers (and a whole lotta money!) for AOS. We would like to take a honeymoon to someplace in the Caribbean. Does anyone know if there is anywhere beyond Florida that entry, then re-entry to the US is permitted in our situation? I understand that US citizens do not need a passport to enter Puerto Rico, but of course she is not a citizen yet. We submitted an I-131, but by the time we receive approval it may already be warm here in upstate NY! Any suggestions or facts are appreciated.

K-1 cannot leave the country until after filing for AOS(I-485) and AP (I-131), and have AP document in hand, AP can take 90 days or so to get.

The Caribbean is not in the USA. Consider other DOMESTIC destinations, like Florida, Hawaii.

I always wonder why US citizens are not interested in showing the recent immigrant to the USA places in the country that they are immigrating to.

I was in the same position, you are allowed only one entry in to the United states, the territories are not covered in this case.
My wife and I ended driving to The Keys instead.

I did apply for an advance parole for my wife to travel back to Russia. It only took 22 days.
I attached a letter explaining the reason why she had to return.

Ah, well, but Puerto Rico is also domestic travel. Puerto Ricans are all USC by birth and it's in a sort of half-a-state, half-independent status.

So going to Puerto Rico shouldn't be a problem.

I believe the US Virgin Islands (St Thomas) is US territory. Might be worth looking into the document requirements.