The are 2 different ways across 2 unique modes of transportation to help you travel from Alsasua to Vitoria-Gasteiz. Train from Alsasua to Vitoria-Gasteiz, it will get you there soon enough!
The trip to Vitoria-Gasteiz is an excellent trip for the day or a nice trip for the weekend from Alsasua. The cheapest way to get from Alsasua to Vitoria-Gasteiz is $14 and the quickest way takes just 1 hour 15 minutes with the train. The earlier you can book your trip to Vitoria-Gasteiz, the better.
While buses have recently gotten bad coverage because of cleanliness of bus stations or winter time accidents, they are can be very convenient for travel. The best part about traveling by bus to Vitoria-Gasteiz is that it can be very cheap. That's because they usually have basic accomodations - WiFi and a restroom. Some of the Alsasua/Vitoria-Gasteiz buses' coverage has been overstated. The real thing to consider when taking a bus from Alsasua is to consider the time of travel and the density of the cities that you're traveling to. If you are traveling by bus between Alsasua and Vitoria-Gasteiz during high traffic times, you can expect to have your trip altered significantly due to traffic. Further, if you are traveling during winter, the bus schedule might be thrown off due to inclimate winter weather. Be sure to plan accordingly!
The plus side of taking the train from Alsasua to Vitoria-Gasteiz? The accomodations, scenery, and lack of Vitoria-Gasteiz traffic can usually be on point. Moreover, you can usually expect your average concessions - such as food and drinks. Most trains have WiFi these days as well. The worst part about trains are the price. While the train to Vitoria-Gasteiz is often cheaper than flying, they are generally more expensive than buses. Train prices are usually set and do not vary as much as bus prices or flights or so the likelihood of finding discounts is pretty rare.