Choosing the airline you want to choose for your positioning flight can make the difference between an almost seamless connection or a sense of déjà vu, where you`ll have to do the entire check-in process at the airport again. This means that you have to land, go to the luggage storage to collect your luggage, return to the departure lane, check your luggage again and return through security. If your international flight departs from a major airport like JFK, LAX or O`Hare, you`ll also need to catch a train between the terminals with all your luggage (except you can`t do it yet in O`Hare). Air France and KLM have signed an agreement with greek regional airline Sky Express. Under this agreement, these three airlines can strengthen their commercial cooperation between Paris, Amsterdam and the Greek islands. If separate tickets are issued in separate PNR, the customer`s baggage is checked in to the final destination of the American 001 ticket. The customer is responsible for the baggage charges related to the second ticket when the baggage is checked in again with oneworld. This may include leaving the security zone to claim the luggage and check it again. International flights may require customs clearance and re-inspection from the other airline to the final destination. In the cases mentioned below, when more than one ticket is presented, Delta will continue to drop off baggage from the point of departure to the destination. With this new agreement, Air France and KLM customers now benefit from 24 new routes in Greece from Paris-Charles de Gaulle and Amsterdam-Schiphol for the continuation of the journey from Athens – Alexandroupolis, Astypalaia, Kefalonia, Chios, Corfu, Kythira, Ioannina, Heraklion, Kalymnos, Karpathos, Kos, Ikaria, Chania, Lemnos, Milos-Plaka, Mykonos, Mytilene, Naxos, Paros, Samos, Santorini, Skiathos, Syros and Zakynthos. . .