For 2024 Pilgrims: €50,- donation = 1 year with no ads on the forum + 90% off any 2024 Guide. More here. (Discount code sent to you by Private Message after your donation)
It seems like internorte.pt does not show results from Santiago to Porto anymore.
If booking directly with ALSA still brings problems, you can try booking with Busbud.
In addition to ALSA, Flixbus is currently offering this route.
Other options would be car-sharing platform BlaBlaCar or taking...
This site is run by Ivar at in Santiago de Compostela.
This site participates in the Amazon Affiliate program, designed to provide a means for Ivar to earn fees by linking to Amazon