Spain with a dog by train, ferry & bus

What the 40 kg rule really means

The old shorthand—‘Spain only allows dogs up to 10 kg in a carrier’—is now out of date for Renfe. But the replacement shorthand—‘all big dogs can take every Spanish train’—is also wrong.

Large-dog places are a specific add-on with limited capacity. Renfe offers it on eligible AVE, Avlo, Larga Distancia, Avant and Media Distancia trains, and on AVE International only while travelling within Spain. Trains with connections and trains using alternative or replacement transport are excluded, and train+bus combined tickets do not accept pets at all. The dog option has to actually appear when you book the exact train, and on some trains or ticket types it won’t.

Capacity is tight: a maximum of one large dog per passenger and two large dogs per train, in one designated carriage. Potentially dangerous breeds, dogs under one year old and females in heat are excluded from the up-to-40 kg product. Renfe also publishes lead, muzzle and document conditions.

Booking a large dog

Search the exact journey, confirm that the up-to-40 kg option appears, and add it before buying the human ticket. The large-dog add-on must be bought no later than 24 hours before departure, and only two large dogs travel on each train.

A large dog does not simply become ordinary luggage. Follow the instructions for arrival and the designated carriage or seating area. The dog needs a non-extendable lead no longer than 1.5 m and a muzzle in the station and while boarding and disembarking; Renfe currently says the muzzle can be removed during the journey as long as the dog stays on the lead in its place.

• Check every train in a connection, not only the longest leg.
• Keep vaccination, identification and any required declarations accessible.
• Recheck the booking shortly before travel because equipment or departure changes can affect the allocated pet place.

Ferries to Spain’s islands with a dog

The island crossings are genuinely workable with a large dog — the key is booking the right on-board space. Baleària carries dogs of any size to the Balearics in pet-friendly cabins or ventilated deck kennel houses, with a pet-friendly seat option for pets up to 8 kg including the carrier; the dog gets its own boarding pass and animals may never stay in the vehicle. Armas Trasmediterránea sells pet cabins from €25 per pet (two pets up to 30 kg each) alongside ship kennels with no weight limit.

Trasmed's Balearic sailings take up to two pets in a pet-friendly cabin with no weight limit, pets up to 8 kg including the carrier in the pet seating area, or any-size pets in video-monitored kennels; pets need their own ticket and may not stay in the vehicle. The Canaries are the friendliest of all: Fred. Olsen Express seats a dog of any weight beside you on a secured Pet Sofa from €7, or in exterior Pet Rooms with a camera from €3. On the strait, DFDS (the former FRS routes) requires every dog to wear a muzzle and lead throughout the crossing, and dogs over 6 kg travel in the luggage area, terrace or ship kennels rather than the lounges.

• Book the pet space in the same booking as your own ticket; pet places are limited per sailing.
• Carry the dog’s health card; Ceuta and Melilla crossings need an EU pet passport and an authorized entry point.
• Never plan on leaving the dog in the car — Baleària prohibits it outright.

Why coaches remain the trap

Spain’s coach network reaches many places the railway does not, but national coach policies commonly restrict ordinary pets to small animals in carriers and may place them in a dedicated hold. For many dogs that simply doesn’t work.

Plan rail-first, then check the exact regional or city operator for any remaining road leg. Do not assume ALSA’s rules, or Renfe’s, apply to every Spanish bus.

Cities and the last mile

Madrid and Barcelona metros allow dogs under detailed rules that include time restrictions, designated areas, short leads and muzzles. City buses can be more restrictive, so the trip from station to accommodation needs checking for each type of transport.

Cercanías and Rodalies are often the most useful car-free extension because dogs travel free. They can open up coastal and suburban destinations without relying on a national coach.