What if your flight is delayed for a while? I wouldn’t risk it, because the transfer time is really quite short, and flights can be delayed very often. I called taxis Kos from the airport on the GetTransfer website and the driver immediately met us with a nameplate and took us to the hotel. You can immediately pay for the transfer on the website so as not to waste time paying the driver later. I advise you to indicate your situation in the comments to the booking and that you will need to get to the ferry port very quickly, so that the driver is aware in advance. I hope you will have time and your flight will not be delayed. I wish you good luck!