The most cost-effective way to go to Bilbao centre from the Bilbao cruise port is by metro. Neguri metro station is about 20 minutes walking (1,5 kilometer) away from your cruise ship. It’s a pleasant walk on a nice promenade along the pier and some monumental houses.
How do I get to the metro station from the cruise port in Bilbao (Getxo)?
Once you disembarked, leave the cruise terminal (small building) area. In front of you is a small Marina. Go to the left. At the roundabout turn right and follow the pier into the center of Getxo. You pass the Getxo Aquarium on your right. On your left you see some monumental houses and a small obelisk. At the roundabout go up to the left. Again you reach a small roundabout. Go straight (in the street of the gas station) After a few minutes you reach Neguri metro station on your right.
Take a metro to Moyua which is the same square as where the shuttle buses arrive. You will only pay about €2 per person one-way. You will want to use the “Ercilla Guggenheim” exit. The second right (Alameda Recalde) will take you to the Guggenheim Museum. A tourist office is located there.