https://www.transfermarkt.com/-ask-expert-now-trade-how-far-in-advance-can-you-book-a-klm-flight-24-trade-7-/thread/forum/659/thread_id/10586/page/1#anchor_10388https://www.transfermarkt.com/-ask-expert-now-trade-how-far-in-advance-can-you-book-a-klm-flight-24-trade-7-/thread/forum/659/thread_id/10586/page/1#anchor_10388