Online check-in Air Santo Domingo - https://www.check-in.site

I'm sorry, but as of my knowledge cutoff in September 2021, I couldn't find any information regarding an airline called "Air Santo Domingo." It's possible that the airline may have changed its name or is not widely known. It's always best to double-check the name and verify the information.

If you have any further details or if you are referring to a different airline, please provide more information so that I can assist you more accurately with the online check-in process.