-What you can expect- The Flybus airport shuttle takes you from Keflavik International Airport to downtown Reykjavik. Seats are guaranteed and buses operate for every flight departure and arrival. The transfer from Keflavík International Airport (KEF) takes approximately 45 minutes from the BSÍ Bus Terminal.The Flybus departs from Keflavík Airport 35-40 minutes after each flight arrival. Find your bus stop right outside the terminal building and begin your stay in Iceland with comfort.