Tululo Tres

For the Santiago concert, there are still tickets available at https://taquilla.servinova.com/entradas/main.php. That's the only ticket buying point for that concert. You've got to search for the Wilco concert, and then in the theatre screen there are more than 150 tickets still for sale in the "C" zone.

More dates for Spain: Santiago de Compostela (1 June). And probably they'll play 28 or 29 may some venue in Portugal