https://www.devex.com/people/does-United-have-a-24-hour-cancellation-policy-2349559
https://www.devex.com/people/understanding-southwest-airlines-ticket-cancellation-policies-2356596
https://www.devex.com/people/understanding-southwest-airlines-ticket-cancellation-policies-2356596
https://www.devex.com/people/guide-to-cancelling-an-united-airlines-reservation-2356042
https://www.devex.com/people/can-i-cancel-my-United-flight-without-penalty-2269643
https://www.devex.com/people/can-i-get-a-refund-on-my-United-flight-if-i-cancel-within-24-hours-2349588