United States
https://central.xero.com/s/question/0D58V00009SHsUBSA1/how-early-to-check-in-for-flight-to-%F0%9D%93%92%F0%9D%93%AA%F0%9D%93%B7%F0%9D%93%AA%F0%9D%93%AD%F0%9D%93%AA
https://central.xero.com/s/question/0D58V00009SHppwSAD/when-can-i-check-in-online-for-%F0%9D%93%90%F0%9D%93%B2%F0%9D%93%BB-%F0%9D%93%92%F0%9D%93%AA%F0%9D%93%B7%F0%9D%93%AA%F0%9D%93%AD%F0%9D%93%AA
https://central.xero.com/s/question/0D58V00009SHpptSAD/when-can-you-check-in-for-a-%F0%9D%95%8C%F0%9D%95%9F%F0%9D%95%9A%F0%9D%95%A5%F0%9D%95%96%F0%9D%95%95-flight
https://central.xero.com/s/question/0D58V00009SHmwOSAT/how-long-before-a-%F0%9D%95%83%F0%9D%95%A6%F0%9D%95%97%F0%9D%95%A5%F0%9D%95%99%F0%9D%95%92%F0%9D%95%9F%F0%9D%95%A4%F0%9D%95%92-%F0%9D%95%97%F0%9D%95%9D%F0%9D%95%9A%F0%9D%95%98%F0%9D%95%99%F0%9D%95%A5c
https://central.xero.com/s/question/0D58V00009SHm4GSAT/how-long-before-a-%F0%9D%95%83%F0%9D%95%A6%F0%9D%95%97%F0%9D%95%A5%F0%9D%95%99%F0%9D%95%92%F0%9D%95%9F%F0%9D%95%A4%F0%9D%95%92-%F0%9D%95%97%F0%9D%95%9D%F0%9D%95%9A%F0%9D%95%98%F0%9D%95%99%F0%9D%95%A5c