https://pressbooks.pub/travelservicemain/chapter/officialdealswhat-is-the-cheapest-day-to-buy-united-tickets/

https://www.alaskaeaf.org/forums/support-forum/9547bd8b-67e9-ef11-b542-000d3a304442

https://sangamhelpdesk.microsoftcrmportals.com/forums/support-forum/3ecfc48e-67e9-ef11-a4de-6045bdbeab55

https://mysupport.partech.com/forums/support-forum/af5fd78d-67e9-ef11-a4de-6045bdb35ea2

https://pressbooks.pub/travelservicemain/chapter/%e3%80%90best-time-to-buy%e3%80%91what-day-is-best-to-%ef%bd%82%ef%bd%8f%ef%bd%8f%ef%bd%8b-a-united-flight/

https://forums.windowscentral.com/threads/%F0%9D%90%82%F0%9D%90%9A%F0%9D%90%A7-%F0%9D%90%B2%F0%9D%90%A8%F0%9D%90%AE-%F0%9D%90%9C%F0%9D%90%9A%F0%9D%90%A7%F0%9D%90%9C%F0%9D%90%9E%F0%9D%90%A5-%F0%9D%90%9F%F0%9D%90%A8%F0%9D%90%AB-%F0%9D%90%9F%F0%9D%90%AB%F0%9D%90%9E%F0%9D%90%9E-%F0%9D%90%B0%F0%9D%90%A2%F0%9D%90%AD%F0%9D%90%A1-%F0%9D%90%81%F0%9D%90%AB%F0%9D%90%A2%F0%9D%90%AD%F0%9D%90%A2%F0%9D%90%AC%F0%9D%90%A1-%F0%9D%90%80%F0%9D%90%A2%F0%9D%90%AB%F0%9D%90%B0%F0%9D%90%9A%F0%9D%90%B2%F0%9D%90%AC.539306/