Emirates, the Dubai-based airline, has a cancellation policy that allows passengers to cancel their flights under certain conditions. The specific details of the policy may....
https://www.airlines-policy.com/how-to-cancel-emirates-flight-ticket

Under the Aegean Airlines cancellation policy, passengers may be subject to cancellation fees based on the fare type and timing of the cancellation. Refund eligibility....
https://www.airlines-policy.com/how-do-i-cancel-aegean-ticket

As per United Airlines cancellation policy, United Airlines allows its passengers to cancel their United Airlines flights up to 24 hours prior to departure without....
https://www.airlines-policy.com/how-to-cancel-flight-in-united-airlines