Casalarreina is strategically located, meaning that reaching the municipality is simple and fast.
Coming by car is a great choice due to the fast connection of Casalarreina with Bilbao, Burgos-Madrid, Logroño and Zaragoza-Barcelona via the AP-68 road which passes through the municipality. It is also worth highlighting that the N-124 passes through the town, which in turn is close to the N-232.
Also especially important is the network of regional roads, such as the LR-111 and the N-120, which connect Casalarreina with nearby municipalities like Haro, Santo Domingo de la Calzada and Ezcaray.
Casalarreina can also be reached by train. The municipality of Haro is just 7km away, and it has good railway connections, being situated on one of the most important railway axes, the Bilbao-Zaragoza-Barcelona line.
There are several options for reaching the municipality by coach via routes offered by diverse companies operating in Northern Spain. Routes from different Spanish cities with stops in Casalarreina are as follows:
- Bilbao: LA UNIÓN ALAVESA
- Vitoria: ALSA
- Logroño: AUTOBUSES JIMENEZ
- Santander: ALSA
- Burgos: SOTO Y ALONSO (Logroño-Burgos route)
The closest airport to the municipality is Logroño, approximately 30 minutes away, which provides a fast connection to both Madrid and Barcelona. Also, Bilbao International Airport is a little more than 100km away, providing both domestic and international access to the municipality.