Air France
Types of pet allowed: Small dogs and cats.
Maximum weight: 17 pounds including transport bag (guide dogs are authorized regardless of their weight); as of November 2017, crates are no longer allowed in the cabin, no matter their dimension.
Cost: $153.56 for flights departing from the U.S.
International?: Yes, but note that this airline does not accept pets in the business cabin on intercontinental flights. The pet must travel in the hold.
