Quick rules for flying with pet in carry-on and checked baggage. Verdicts and conditions across the major aviation regions below.
TSA doesn't regulate pets — airlines do. Most US carriers allow small dogs/cats in cabin in a soft carrier under the seat (max ~43×30×19 cm / 17×12×7 in) for $95–150 one-way. Larger pets go in the cargo hold (extra fees, more risk). Snub-nosed breeds (Bulldogs, Pugs, Persian cats) banned from cargo by most airlines due to breathing risks. Health certificate required for most flights.
Most EU airlines allow cats and small dogs in cabin (max 6–8 kg combined with carrier), in approved carrier under seat. EU Pet Passport required for travel within EU. Larger pets travel as cargo.
STRICT — pets CANNOT fly into the UK in the cabin from anywhere except Ireland (only assistance dogs allowed). Pets arriving in the UK must travel as manifest cargo on approved routes under the Pet Travel Scheme (microchip, rabies vaccine, EU Animal Health Certificate or GB Pet Passport).
Most LATAM carriers (LATAM, Aeroméxico, Avianca, Copa, GOL) allow small cabin pets ($60–200). Health certificate from licensed vet required, typically within 10 days of travel. Some Caribbean destinations require quarantine. Brazil requires Animal Health Certificate (CVI).