SATA Air Acores flight from Flores to Corvo (full flight) 

Plane ticket was 39 Euros. I don't know how much the boat ticket cost - somewhere between 5 and 10 Euros, I think, but I am not sure.

@@windowseatplease 39 euros is not too bad considering there were only three people on the plane and it must have been an incredible experience. I imagine the boat only runs during the summer. The island of Corvo is tiny. I guess it is just the volcano crater. Flores is about four times larger and has the lake with the waterfall right behind it. I imagine you arrived first at Ponta Delgada or at Angra do Heroismo and then visited the different islands. You were lucky to have made that trip before the Pandemic started.

I'd left it too late: the boat was sold out when I tried buying a ticket two days before the trip. I took the boat back though.