Starting on August 1, 2024, dogs entering or returning to the United States that have been only in dog rabies-free or low-risk countries in the past 6 months must meet the following requirements: be healthy, have a microchip, be at least 6 months old and complete the CDC Dog Import Form
You can get the instructions to fill this form at the CDC Import Form instructions
Starting on August 1st, bookings for transporting animals in the hold will no longer be accepted on flights to or from the USA. Domestic animals and assistance dogs will only be permitted in the cabin.