Madrid to Porto distance

Madrid to Porto by road

The fastest driving route is 555 km (345 mi) long and takes about 6 hr 20 min without stops or traffic. It runs mostly on the A4 (215 km), the A-6 (110 km), and the N-122 (73.1 km).

Of the 555 km, 334 km are in Spain and 221 km are in Portugal. That’s an average of 88 km/h (55 mph). Spain’s traffic authority (DGT) recommends a break every two hours or 200 km: with 3 stops of 20 minutes, the trip takes about 7 hr 20 min. The time is OSRM’s estimate with OpenStreetMap data: no traffic and speeds somewhat below the limits, so real trips can differ.

Straight-line distance and bearing

In a straight line, the shortest distance over the Earth’s surface, Madrid and Porto are 423 km (263 mi) apart. That’s the geodesic on the WGS84 ellipsoid, the distance “as the crow flies”.

The road is 31% longer: for every 100 km in a straight line you drive 131. That’s a big detour: the fastest route strays quite far from the straight line. Of the 10 cross-border pairs in this series, it ranks 5th for detour (the average is 31%).

From Madrid, Porto lies to the west (bearing 283°), and from Porto, Madrid lies to the east. The straight line reaches Porto on a bearing of 279°: on a sphere the bearing keeps changing along the way, which is why the shortest route looks slightly curved on a flat map.

Halfway between Madrid and Porto

Halfway along the straight line, 211 km (131 mi) from each city, is the point 40.8100° N, 6.1380° W. It falls near San Muñoz (Salamanca, pop. 192), 3.2 km away. The nearest town of 20,000 people or more is Salamanca (pop. 146,110), 43.6 km away.

By road, the halfway point is 278 km (173 mi) from each city, near Muelas del Pan (Zamora, pop. 592), 3.3 km away. The nearest town of 20,000 people or more is Zamora (pop. 59,815), 21.4 km away. The two midpoints are 81.7 km apart: if you want to meet halfway, the one on the road is the useful one.

Time difference and flight

Porto is 1 hour behind Madrid all year (Western European Time versus Central European Time): when it’s 12:00 in Madrid, it’s 11:00 in Porto.

No flight time is given: under 500 km (311 miles) in a straight line, time at the airport outweighs time in the air.

The two cities

Madrid has 3.5 million people (INE population register, January 1, 2025) and Porto 252,687 people (GeoNames).