https://www.devex.com/people/does-alaska-still-have-free-cancellation-2267236
https://www.devex.com/people/what-is-the-cancelation-policy-for-lufthansa-2267240
https://www.devex.com/people/does-delta-have-a-cancellation-policy-2267209
https://www.devex.com/people/does-british-airways-have-a-free-cancellation-policy-2267274