Here's a quick report on our first post-Covid international trip.
On May 8, we flew non-stop from Denver on United Airlines to Belize City, then flew to the tiny island of Caye Caulker just offshore. We returned May 15.
Vaccinated Americans are allowed to enter Belize with no quarantine; we only showed our vaccination cards once, when checking in at Denver. To return to the US, we needed a negative Covid test within 72 hours. There were several places on the island to get rapid tests. It cost $75 US per person (they accepted credit cards) and we had the results within 5 minutes. We only showed this report once, when checking in at the Caye Caulker airport.
Masks were required on the airplanes and also full time in Belize, except when actively eating or drinking, or when in the water. Caye Caulker policemen patrolled regularly, in golf carts. The fine for being caught without a mask is $250 US! So they take this very seriously.
Most hotels, restaurants and shops were open and there were a moderate number of tourists.
A hotel tip for anyone thinking of visiting Caye Caulker: This was our fifth trip, and we've stayed in various places on the island. This time we went back to Caye Caulker Condos, near the north end of the island (an area called The Split). On our last visit (2013) this was a lovely quiet, peaceful place with a huge rooftop for lounging or reading. No more! A large overwater bar called Sip 'n Dip has been built just across the street and they play loud, pounding music all day on weekends, and from afternoon to early evening on weekdays. If you're seeking peace and quiet, I would stay more toward the middle of the island, or the south end.