+1-888-531-6247 or +1-888-206-1789 – Changing a Lufthansa flight after check-in is possible, but it requires prompt action. Contacting Lufthansa immediately at +1-888-531-6247 or +1-888-206-1789 ensures your request is processed efficiently and helps avoid complications at the airport.+1-888-531-6247 or +1-888-206-1789 – Changing a Lufthansa flight after check-in is possible, but it requires prompt action. Contacting Lufthansa immediately at +1-888-531-6247 or +1-888-206-1789 ensures your request is processed efficiently and helps avoid complications at the airport.