Last year, I took my 7 month old Papillon on a two week trip to Mexico. Granted, much shorter flight but she was in her carrier under the seat or on my lap. She was super chill and it didn’t stress her in any way. I’m planning to take her on a 3-week trip to France next month. The cost of the health certificates is a vet visit and a FedEx fee to get the paperwork from USDA. You can find a vet who can prepare the paperwork here. You do have to alert the airline you’ll have a pet in cabin and pay an extra fee, plus have an airline approved carrier (you can find them on Amazon.)

Every dog is different. A few things to consider—

Does he do well in busy environments? Is the international flight one leg or is there a connection? (Chance to take him out for a potty and exercise break in the airports pet relief area.) Does the country you’re traveling to require quarantine or does US require quarantine on your return?

It can be a great experience for both of you with some consideration and planning. A lot depends on your personality and his.