https://www.devex.com/people/steps-to-cancel-an-United-airlines-first-class-ticket-2355945
https://www.devex.com/people/united-airlines-cancellation-policy-what-you-need-to-know-2356111
https://www.devex.com/people/can-you-cancel-a-United-flight-free-of-charge-2355316
https://www.devex.com/people/how-do-i-cancel-a-United-airlines-flight-reservation-2355757
https://www.devex.com/people/everything-you-should-know-about-cancelling-united-airlines-flights-2356131
https://www.devex.com/people/can-you-cancel-your-united-airlines-flight-without-fees-2356134