With Qatar Airways, online flight cancellation is hassle-free. If you want to modify your flight, see Qatar Airways cancellation policy and read it. The airline’s 24-hour cancellation policy allows passengers to change their flight reservations made with Qatar Airways up to 24 hours after making the purchase. Additionally, Qatar Airways will reimburse the entire cost of your ticket if you placed your reservation a week or more before the day of your journey. Qatar Airways has the right to modify its 24-hour cancellation policy at any time.