Spain · Regional bus rules
Can my dog travel on Bizkaibus in Bizkaia?
Checked · Official source ↗
No. Bizkaibus only take animals under 8 kg.
What this means for you: Bizkaibus is the provincial network — Bilbao to the coast, the airport, the valleys — and it stops at 8 kg. A big dog does Bizkaia on Euskotren (Bilbao to Bermeo, to Donostia) and the Cercanías; the metro is still carrier only until its announced change is approved.
The rule, line by line
What Bizkaibus actually say.
- Who gets on
- Dogs and cats up to 8 kg in a closed cage or carrier, on any line. Article 16 of the conditions of use.
- Who doesn’t
- Anything over 8 kg; anything outside a carrier.
- How much
- Free.
- Where they ride
- In the carrier.
- Never, whatever the size
- Dogs over 8 kg.
- Where this applies
- Bizkaia provincial 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 Euskotren, the Cercanías and the Metro
The regional bus is one rule; each city network and train operator inside the region is another. 2 of the 4 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.
Pets may accompany you when they’re neither dangerous nor a nuisance. Not on Euskotren’s buses or replacement buses.
One pet per passenger, no weight limit, free — dogs on a lead and muzzled; local restrictions can apply.
Where it’s carrier only
Two networks. A dog that fits in a closed bag or basket on your lap rides. A dog on a lead doesn’t, however calm.
Current conditions (2024): a dog on a lead in your arms, or inside a carrier; cats always in a carrier; microchip required. A rule for dogs over 8 kg was announced on 19 June 2026 and applies once Article 18 is approved.
Announced, not yet in force.
Small domestic animals in a carrier; no weight published.
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.