
Spain by Bus, Train or Plane: Which Wins on Each Route
Spain has both the most extensive high-speed rail network in Europe and one of the cheapest long-distance bus networks. Which one to take is not a general preference — it flips route by route, and mostly on how far ahead you are booking.

The main routes compared
| Route | AVE | Bus | Take |
|---|---|---|---|
| Madrid → Barcelona | 2h30, €30–90 | 7–8h, €20–35 | Train |
| Madrid → Seville | 2h30, €30–75 | 6h, €20–30 | Train |
| Madrid → Valencia | 1h40, €25–60 | 4h, €15–28 | Train |
| Madrid → Granada | 3h20, €35–70 | 5h, €20–35 | Either |
| Seville → Granada | 3h, €30–45 | 3h, €25–35 | Bus |
| Seville → Lagos (PT) | no rail | 4h, €20–30 | Bus |
| Barcelona → Valencia | 3h, €25–45 | 4h30, €20–30 | Train |
The pattern: the AVE wins wherever the line is genuinely high-speed — the radial routes out of Madrid — and the bus wins where it is not, notably between Andalusian cities and anywhere crossing into Portugal.
The booking window matters more than the mode
Renfe fares are dynamic and climb steeply. A Madrid–Barcelona ticket at €30 booked six weeks ahead is €90 the week before. Buses barely move.
So the honest rule is: book AVE three to six weeks ahead and it beats everything; leave it late and the bus wins.
Look also at Ouigo and Avlo, the low-cost high-speed operators now running the Madrid–Barcelona, Madrid–Valencia and Madrid–Seville corridors. Same tracks, same stations, restrictive luggage rules, fares often half the standard AVE.

Buses, which are better than their reputation
ALSA dominates the intercity network, with regional operators filling in. Coaches are modern, air conditioned and comfortable, with reclining seats on long routes.
Two genuine advantages beyond price:
They reach places the railway does not. The white villages of Andalusia, much of Extremadura, and the Portuguese border crossings are bus-only.
They are flat-priced. A last-minute bus costs roughly what an advance bus costs, which makes them the right choice for an improvised trip.
Flying
Worth it for two cases only.
The islands. Balearics and Canaries — flying is the only practical option and fares from the mainland are low, often €30–70.
Very long mainland diagonals, such as Barcelona to Seville, where the rail journey exceeds five hours.
For Madrid–Barcelona, flying is slower once you count two airport transfers and security, and the train station is in the middle of both cities.

Local transport
City metros and buses are inexpensive: a single is typically €1.50–2.50, and multi-trip cards cut that substantially. Barcelona's T-casual gives ten journeys for around €12.55; Madrid's Metrobús card is similar.
Spanish cities are compact enough that walking covers most of a visit, and the metro is for the airport and outer districts.
The practical summary
Book the AVE three to six weeks out for the radial routes from Madrid and it is both fastest and cheapest. Use ALSA for Andalusian city pairs, anything crossing to Portugal, and last-minute travel. Fly only to the islands. And check Ouigo and Avlo on the big corridors before paying full AVE prices.