https://www.lakeviewlifestyle.com/wp-content/uploads/formidable/9/%E3%80%90airlines-faq%E3%80%91-what-happened-to-hainan-airlines.pdf
https://officialarilinecancellation.zohodesk.com/portal/en/kb/articles/does-british-have-24-free-cancellation-british-airways-call
https://officialarilinecancellation.zohodesk.com/portal/en/kb/articles/does-british-have-24-free-cancellation-british-airways-s-24-hour-rule
https://officialarilinecancellation.zohodesk.com/portal/en/kb/articles/british-airways-s-24-hour-rule-does-british-have-24-free-cancellation
https://officialarilinecancellation.zohodesk.com/portal/en/kb/articles/overall-call-does-british-have-24-free-cancellation
https://officialarilinecancellation.zohodesk.com/portal/en/kb/articles/24-hour-refund-guarantee-does-not-apply-call-does-british-have-24-free-cancellation
https://officialarilinecancellation.zohodesk.com/portal/en/kb/articles/then-realize-they-need-to-adjust-dates-does-british-have-24-free-cancellation