Spain · Regional bus rules
Can my dog travel on CRTM interurban buses in Madrid region?
Checked · Official source ↗
No. Your dog has to fit in a closed carrier.
What this means for you: The green interurban buses are carrier only, so the Madrid region for a big dog is the Cercanías — free, muzzled, on a lead — and the metro where it reaches. The Sierra towns on the Cercanías lines are reachable; the bus-only villages aren’t, unless you’re happy with a taxi for the last stretch.
The rule, line by line
What CRTM interurban buses actually say.
- Who gets on
- Small domestic animals in a suitable receptacle, carried by their owner, as long as they don’t bother anyone by smell or noise. Article 25.d of the Reglamento de Viajeros del Transporte Interurbano.
- Who doesn’t
- Any dog outside a receptacle — whatever its size, whatever the line.
- How much
- Free in a carrier.
- Where they ride
- In the receptacle.
- Never, whatever the size
- Anything not in a receptacle.
- Where this applies
- Comunidad de Madrid — the green interurban buses — the regional bus network. City networks and trains in the area are below. Double-check who actually runs your service.
- Assistance dogs
- Guide and assistance dogs ride free everywhere with their identification, and the carrier rules don’t apply to them.
Inside the region — city buses, metro, train
Dogs on the Metro and the Cercanías
The regional bus is one rule; each city network and train operator inside the region is another. 2 of the 3 networks below take a big dog — muzzled, on a short lead, and usually outside rush hours.
Where a big dog rides — muzzled, on a short lead
There are two networks where the idea is the same: lead, off the seats, and you clean up. Muzzles and fares vary, so read the row.
One microchipped dog per person, muzzled, on a lead no longer than 50 cm, in the last carriage, off the seats. Not on weekdays 07:30–09:30, 14:00–16:00 and 18:00–20:00; no time limits at weekends, on holidays, or in July and August.
One pet per passenger, no weight limit, free — dogs on a lead and muzzled; local restrictions can apply.
Where it’s carrier only
One network. A dog that fits in a closed bag or basket on your lap rides. A dog on a lead doesn’t, however calm.
Small pets in a suitable carrier, as published. The 2019 dog-card scheme for dogs on a lead isn’t documented anywhere we can find.
Checked 14 September 2026. Local rules change more often than the area rule — recheck the week you travel.
Your next step
So what do you do instead?
Three alternatives, in the order I’d try them.
- Choose a location that’s serviced by a train.Ideally a station in the town itself, not a railhead half an hour out. Look at the walk from platform to front door before you book — a dot on the map isn’t the same as an easy last connection with a big dog.
- Walk it.Under about 3 km on a proper path, walking usually beats the alternatives — and it’s the one option nobody can refuse you.
- Book a taxi, an Uber, or a private car service.Check they take dogs, and book before you go. Turning up at a rank with a 30 kg dog and no arrangement is where these trips actually fall apart.