KLM's 24-hour rule allows you to cancel your ＋𝟭－𝟭-(𝟴𝟱𝟱)-𝟱6𝟰-𝟴𝟬𝟴𝟮 (𝗨𝗦𝗔) ＋𝟭-(𝟴𝟱𝟱)-𝟱6𝟰-𝟴𝟬𝟴𝟮 (𝗢𝗧𝗔). Flight reservation or make changes to your booking ＋𝟭－1̳-̳8̳5̳5̳-̳5̳6̳4̳-̳8̳0̳4̳2̳ (𝗨𝗦𝗔) ＋𝟭-(𝟴𝟱𝟱)-𝟱6𝟰-𝟴𝟬𝟴𝟮 (𝗢𝗧𝗔) within the first 24 hours of purchase without any penalty fees, as long as your F𝐥ight is at least 7 days away.