I'm afraid you're out of luck for the immediate future.
Even for me as an EU resident, to run down there involves pain-in-the-ass paperwork and constant testing I needed a 72 hours-old-or-less PCR test on a computer-legible QR form even to board the plane down there, and another 48-hours-old-or-less negative test to be allowed to fly back to Germany. I also had to bring (but wasn't asked for) an invitation from the office I was visiting to show why my presence was needed physically. Once there, I was allowed to move around fairly freely, but I was still advised against visiting my favorite shopping spots, especially the Mercat Boqueria.
As fate would have it, while I was there, I did run into an old American acquaintance. He is from New York, but married to a Swiss citizen, which was his free ticket to a Schengen area residence permit. They had visited Barcelona a few years back, and were so blown away that they decided to move there. They both speak rudimentary Castilian, and are taking courses in Catalan. They both work for an American company that doesn't really care where in Europe they are based, although giving up Switzerland as a place to reside is a major move. There are plenty of people in Spain that would give their left feet for fluency in the Zürich dialect, and a steady job there (or anywhere in Switzerland) with a residence permit.
For now, anyway, the usually crowded city of Barcelona was relatively empty. Instead of the usual 45 minutes necessary to get to the airport by taxi, it was only 25 minutes, and you don't have to wait for anything--IF it's open. The usual throng of Pakistani street hustlers have disappeared, but by the same token, comparatively few places among the thousands of wonderful cafés and tapes places are open.
One of the main hindrances of my usual frequent trips down there is that the flight schedule has been so curtailed that the days when I could fly down there in the morning and back in the evening are temporarily gone. The 6 AM flight down there from here is gone, and the 10:30 AM flight only operates one day a week now. The evening flight back at 7:30 PM has disappeared altogether, and I have to spend the night and fly back the next day at 12:45 noon.
I figure a few more months at least before you can book your trip with a reasonable expectation of being able to actually leave on the flights you have booked.
Still, these things sometimes change on a dime, so keep up with advisories from the Spanish Health Ministry and the State Department. A simple permission to fly there won't be much fun if they make you quarantine for two weeks before you are allowed to even leave your hotel room. You'll get here/there eventually, don't give up! And once you do, you'll see that it was worth the wait. Barcelona is absolutely one of my favorite cities in all the world. Knowing I can leave my house any time, and be sitting at one of my favorite cafés/tapes places at the Plaça de la Catedral or the Sagrada Familia four hours later is one of the main reasons I didn't pressure MY wife to come live there.
= new reply since forum marked as read
