The Most Important Decision: Cabin or Cargo?
Flying with a pet starts with one fundamental question: can your pet fly in the passenger cabin, or must it go in the cargo hold? The answer depends almost entirely on the pet's size and weight — and it has enormous implications for your pet's safety and stress levels.
In-cabin: Your pet travels in an approved carrier under the seat in front of you. Generally limited to cats and small dogs weighing under 8 kg (17.6 lbs) combined with the carrier.
Cargo (checked pet): Your pet travels in the pressurized but unstaffed cargo hold. Larger animals, or any breed considered high-risk by the airline, must go this route.
In-Cabin Pet Rules: What Every Airline Requires
Regardless of airline, the following rules are nearly universal for in-cabin pets:
- Carrier must fit under the seat — typically 45 × 35 × 20 cm (18 × 14 × 8 inches)
- Combined weight limit: Usually 6–10 kg (carrier + pet together). Check your specific airline.
- Only one pet per passenger (some airlines allow two small pets in one carrier)
- Health certificate: Most airlines require a vet-issued certificate dated within 10 days of travel
- Booking required in advance: Pet spots are limited per flight — never assume you can just show up
Which Airlines Are Most Pet-Friendly? (2026)
Best for In-Cabin Pets
JetBlue (US): Among the most pet-friendly US carriers. $125 each way (as of 2026). Weight limit 20 lbs + carrier. Cats and dogs only.
Air France: Allows cats and dogs in-cabin up to 8 kg. Reasonable €100 fee. Good breed restrictions policy.
KLM: Similar to Air France — 8 kg limit in-cabin. €200–€400 fee depending on destination.
Lufthansa: In-cabin up to 8 kg, €70–€100 within Europe. One of the more affordable European options.
United Airlines: Cats and dogs only, 20 lbs limit. $150 each way. Available on most (but not all) routes.
Most Restrictive
British Airways: Does NOT allow pets in the cabin on any flights. All pets must travel as cargo or with a specialist pet freight company.
Ryanair/EasyJet (budget EU): Pets not allowed in the cabin at all. Certified assistance/guide dogs are the only exception.
Qantas: Very restrictive. Most international Qantas routes do not accept pets even in cargo from overseas (strict Australian biosecurity).
Breed Restrictions: The "Snub-Nose" Problem
Many airlines restrict brachycephalic breeds (flat-faced dogs and cats) due to breathing risks at altitude and during temperature changes. This is especially important for cargo travel:
Common restricted dog breeds:
- Bulldogs (English, French, American)
- Pugs
- Shih Tzus
- Boston Terriers
- Boxers
Common restricted cat breeds:
- Persians
- Himalayans
- Exotic Shorthairs
Some airlines ban these breeds in cargo entirely. Others accept them in-cabin only. A few ban them from all air travel. Always check with your specific airline before booking.
Documentation You Will Need
| Document | When Needed | Notes |
|---|---|---|
| Health certificate | Almost always | Issued by licensed vet, usually within 7–10 days of travel |
| Vaccination records | International travel | Rabies vaccination required for most countries |
| Microchip documentation | EU travel, Australia, others | ISO standard microchip |
| Import permit | Some countries | Check destination country requirements |
| USDA endorsement | US-origin international | Required by many countries for US-issued certificates |
Cost Breakdown: What You Will Actually Pay
In-cabin pet fees per flight (one way, typical 2026 ranges):
- US domestic: $95–$150
- US to Canada/Mexico: $100–$200
- Transatlantic/transpacific: €75–€500 (varies widely)
Cargo pet fees depend on route, weight, and carrier. Expect $200–$800+ for international cargo shipping.
Tips for a Smooth Pet Flight
- Book the pet spot when you book the ticket — flight pet allowances fill up
- Train your pet with the carrier weeks before travel — familiar smells reduce stress
- Do not feed your pet for 4–6 hours before the flight — reduces nausea
- Exercise your pet thoroughly before departing — tired pets sleep on planes
- Line the carrier with an unwashed piece of your clothing — your scent is calming
- Avoid sedation unless explicitly recommended by your vet — sedation affects breathing at altitude
Use the pet policy calculator to check your airline's exact rules, fees, and carrier size limits before you book.