The KLM Airlines Athens Office  Customer Contact Centre online page, or use their 24/7 social media and messaging channels.Airlines might offer different extra services to help make your trip easier and more comfortable.Airport Transfer Services tell you about ways to get from the airport to nearby places.Lounge Access lets passengers who qualify know about airport lounges, what they offer, and how to get in.Priority Boarding helps certain travelers get on the plane earlier and save time waiting.Upgrade Services explain how you can move to a better class of seating, including who can do it, how available it is, the costs involved, and the rules.These services may not be available on all flights, and their availability depends on the airline, the route, the type of ticket, your membership status, and the airport.