Can My Pet Fly? A Veterinary Fitness to Fly Guide for International Travel
Most healthy dogs and cats can fly internationally without significant problems. But there are medical and physical conditions that make air travel genuinely inappropriate for certain animals – and some conditions where the risk is real but manageable with the right preparation. This guide helps you assess where your pet sits on that spectrum.
Why Fitness to Fly Matters
The conditions in an aircraft cargo hold – reduced oxygen levels, lower atmospheric pressure (equivalent to approximately 8,000 feet altitude), temperature variation and the stress of noise and movement – place measurable physiological demands on an animal. For a healthy adult dog or cat, these demands are manageable. For an animal with a compromised respiratory system, heart condition, or other health vulnerability, the same conditions can become dangerous.
Airlines increasingly request a vet fitness certificate for pets travelling as cargo. Many also have specific mandatory refusal criteria. Understanding these helps you plan honestly.
Conditions That May Prevent Flying
Brachycephalic Obstructive Airway Syndrome (BOAS) Flat-faced breeds (pugs, French bulldogs, English bulldogs, Persian cats, etc.) have structurally compromised airways. The reduced oxygen pressure in a cargo hold, combined with heat and stress, creates a significantly elevated risk of respiratory distress. Many airlines ban brachycephalic breeds from cargo hold travel entirely, or apply seasonal and route restrictions.
If your brachycephalic pet has had corrective surgery (nostril widening, soft palate resection), an updated post-operative vet assessment can document improved fitness. This may or may not change the airline’s position.
Heart disease Dogs and cats with diagnosed heart conditions – including dilated cardiomyopathy (DCM), hypertrophic cardiomyopathy (HCM in cats), or significant murmur grades – face elevated risk during the reduced-oxygen phase of flight. Your cardiologist or vet should be consulted about whether the specific severity of the condition makes travel inadvisable.
Respiratory disease Active pneumonia, tracheobronchitis, laryngeal paralysis or other respiratory conditions make cargo travel high risk. Treatment and a clearance assessment should precede any booking.
Recent surgery Animals that have recently undergone surgery (particularly abdominal, thoracic or orthopaedic procedures) should not fly without specific veterinary clearance. The timing recommendation varies by procedure.
Pregnancy (third trimester) As covered in the pregnant dog travel guide, airlines typically refuse animals in late pregnancy.
Age extremes Very young animals (typically under 8 weeks for puppies, under 12 weeks for kittens) are not accepted for cargo travel by most airlines due to physiological vulnerability. Very old animals with multiple health conditions may be assessed case by case.
Seizure disorders A dog or cat with uncontrolled epilepsy or a history of stress-triggered seizures is at elevated risk during travel. Discuss with your vet whether medications used for seizure control are compatible with travel, and whether the trip is advisable.
What a Fitness Assessment Involves
A vet fitness assessment typically includes:
- Full physical examination
- Auscultation of heart and lungs
- Assessment of gait and musculoskeletal health
- Review of current medications
- Assessment of temperament and anxiety levels
- Temperature tolerance check (especially for brachycephalic or double-coated breeds)
The resulting certificate confirms the animal is fit to travel, notes any relevant health information and is signed by the vet. This document is separate from the official health certificate required by customs – it is a welfare document for the airline.
If Your Pet Cannot Fly
If your vet advises against flying, options include:
- Sea freight (container or RORO vessel pet services on selected routes): removes altitude-related concerns but adds journey time
- Delay travel until health improves and medical clearance is obtained
- Overland transport where the route allows it
- Rehoming in the current country and adoption of a new pet at the destination: not a preferred option but sometimes the most genuinely welfare-focused choice
Sources: IATA Live Animals Regulations (LAR) 50th Edition; British Veterinary Association guidance on fitness to fly; BSAVA guidelines on brachycephalic breeds; RCVS guidance on travel fitness certification.