Want to know about Lufthansa cancel within 24 hours ? You may cancel your ticket within 24 hours of making your reservation, yes. One justification to stop taking flights could be the recent pandemic. Political and medical issues can also have an impact on your choice. You may also cancel your reservations with Lufthansa for the following reasons like Numerous changes in the travel plan,Loss in the family of the flyer,Personal issues,Natural disasters etc.