My husband and I were fortunate enough to travel to Spain in November, 2021 after 3 previously-scheduled trips were canceled. We hit a “sweet spot” where travel in Spain seemed reasonably safe without too many complications. We had to show our Covid vaccination cards when we checked in with Delta Airlines and our QR code when we arrived in Madrid, but otherwise, no one asked to see either for the remainder of our trip.
The weather was warm enough that we were able to dine outside for many of our meals. We easily adapted to Spanish dining tradition by having a larger meal for lunch and a lighter tapas-style meal for dinner. We took the train between each city and booked tickets in advance.
Many people wore masks - even outside. It was the beginning of the holiday season and we noticed that restaurants and bars were really crowded in the evenings and people were not masked inside. We are not surprised by the high Covid numbers in Spain now (late December, 2021).
About one week in advance, we made an online booking for the return-flight Covid testing at Democratest on Gran Via 6 in Madrid - we received our negative results within a couple of hours.
Itinerary: (We kept it simple):
Flight into Madrid and train directly to Cordoba (AVE high speed train took 2 hours - booked in advance).
Cordoba - 4 nights
Cadiz - 4 nights
Seville - 5 nights
Vitoria-Gasteiz - 4 nights
Madrid - 4 nights