Safe travels! klm allows passengers to check in online, via mobile, or at the airport. Online check-in opens 24 hours before your flight's scheduled departure and closes 1 hour before for domestic flights and 2 hours before for international flights 𝟏.𝟖𝟓𝟓.𝟖𝟑𝟖.𝟒𝟗𝟔𝟐. You can complete your...