Most airlines will allow your puppy to travel in the passenger cabin if you follow certain rules. For example, puppies in the passenger cabin must remain in a safe kennel that's placed under the seat in front of you. A kennel is actually a Pet carrier.
If you want your puppy to fly with you in the passenger cabin, make your reservations as early as possible. Airlines restrict the number of Pets allowed in the passenger cabin of each flight.
Once you call and reserve your puppy's space, you may pick up its ticket when you pick up yours. A ticket for your puppy in the passenger cabin will cost around $50 for a one-way trip.
In Europe make it 50 euros
http://www.virgin-express.com/en/traveltips/pets/
Guide dogs are free of charge.
Pet passports and other ID
All animals - human, feline or canine - must have a valid international passport to fly with us. Following recent EU regulation, pet passports must provide:
All the necessary information about the animal's health, including proof of anti-rabies vaccination/revaccination.
The passport should also feature the animal's clinical history so it can be used outside the EU too.
The animal must have a clearly readable tattoo or an electronic identification system (transponder).
Please note that for flights operated by codeshare partners other rules may apply
Please refer to your vet for further information on these requirements.
Passports in an hour
At Brussels International Airport (Zaventem), S.O.S. Vétérinaires offer a 'pet passport within the hour' service. Give them a call on +32(0)497/40.04.00 (24 hour hotline) or e-mail sos.veterinaires@proximus.be to order this service.