Rules for travelling with dogs on public transport in Spain vary widely depending on the operator and the city. Credit: Shutterstock/Ever Vera
Think your pup is a permanent “plus one”? In Spain, it’s not that simple. While the country is becoming increasingly pet-friendly, hopping on a train, bus, or metro with your dog can feel like solving a high-stakes puzzle. For many expats and travelers, the assumption that pets are either “all in” or “all out” leads to a rude awakening at the turnstile.
From Madrid’s strict rush-hour bans to the “no-paws-on-the-floor” rule in Bilbao, the regulations are a patchwork of local laws that could leave you stranded, or facing a surprise fine. Before you grab the leash, here is the essential breakdown of how to move around Spain without the headache.
Train travel tends to be the most pet-friendly
Rail travel is generally one of the easiest ways to move around Spain with a pet. On services operated by Renfe, small animals such as dogs, cats and ferrets are usually allowed on many trains if they travel inside an approved carrier.
For high-speed AVE and long-distance routes, pets typically must weigh under around 10 kilograms and remain inside the carrier for the duration of the trip. Some routes also allow larger dogs to travel under specific conditions, including a leash, muzzle and an additional pet ticket.
Commuter rail services tend to be more flexible. On many local trains, dogs may travel without a carrier, although they must remain on a leash and may be required to wear a muzzle depending on the operator’s rules.
Metro systems vary widely across Spanish cities
Metro networks in Spain often allow dogs, but conditions can differ significantly depending on the city.
On Metro de Madrid, for example, dogs are permitted but cannot travel during weekday rush hours. They must be kept on a short leash and wear a muzzle while inside the system.
In Barcelona Metro, dogs can travel outside peak weekday hours provided they are on a lead and wearing a muzzle. Animals inside a carrier are generally allowed without time restrictions.
Meanwhile, Metro de Bilbao applies stricter rules in some cases, requiring dogs to be carried in arms or transported inside a carrier so they do not touch the train floor.
These differences mean passengers travelling between cities should always check the local transport operator’s rules before boarding with a pet.
Buses are usually the strictest option
Bus travel tends to be the most restrictive form of public transport for animals in Spain. Many long-distance coach companies only allow small pets, and often only if they remain inside a carrier.
Operators such as ALSA generally permit animals under specific conditions, usually limiting travel to small pets and requiring advance booking. In many cases the animal must remain in an approved transport box throughout the journey. Larger dogs are rarely accepted on long-distance buses, although assistance dogs are always allowed under national accessibility rules.
Mallorca shows how rules can change within the same island
Mallorca offers a good example of how pet rules can change depending on the transport network.
In Palma, city buses operated by EMT allow dogs to travel under certain conditions, typically requiring a leash and muzzle if the animal is not inside a carrier. Rail and metro services on the island also permit dogs with similar restrictions.
However, the situation is different on the island’s interurban bus network, which connects towns outside the capital. These buses generally allow assistance dogs but do not accept ordinary pets in the passenger area. As a result, travellers may find that a dog can accompany them on one part of a journey but not on the next.
Common questions travellers ask about pets on public transport
Do dogs need their own ticket on trains in Spain?
On many long-distance train services, pets require a small additional ticket. Rules vary depending on the type of train and the size of the animal.
Are muzzles required on public transport?
Many metro systems and trains require dogs to wear a muzzle if they are travelling outside a carrier.
Can large dogs travel on public transport?
Large dogs are sometimes allowed on trains but are rarely permitted on buses unless they are assistance animals.
What travellers should check before bringing a pet on board
Because regulations vary so widely across Spain, passengers travelling with pets should always check the rules of the specific operator before starting a journey. While trains and metro networks often allow dogs with certain restrictions, buses remain far more limited.
Understanding these differences in advance can make travelling with a pet much easier and help avoid unpleasant surprises at the station or bus stop.