https://amtrakoig.gov/sites/default/files/webform/foia_form/_sid_/%E3%80%9024×7-help%E3%80%91is-delta-support-24-hours.pdf
https://amtrakoig.gov/sites/default/files/webform/foia_form/_sid_/%E3%80%90-air-france-gide%E3%80%91what-number-is-1-800-237-2747.pdf
https://amtrakoig.gov/sites/default/files/webform/foia_form/_sid_/%E3%80%90delta-service-24×7%E3%80%91what-is-the-24-hour-rule-for-delta.pdf
https://amtrakoig.gov/sites/default/files/webform/foia_form/_sid_/%E3%80%90airlines-service-24×7%E3%80%91how-do-i-connect-to-air-france.pdf
https://customerservice24x7help.zohodesk.com/portal/en/kb/articles/lufthansa-update-24×7-what-is-the-24-hour-rule-for-lufthansa-28-8-2025-1
https://customerservice24x7help.zohodesk.com/portal/en/kb/articles/lufthansa-update-24×7-what-is-the-24-hour-rule-for-lufthansa-28-8-2025
https://customerservice24x7help.zohodesk.com/portal/en/kb/articles/lufthansa-update-24×7-what-is-the-24-hour-rule-for-lufthansa
https://customerservice24x7help.zohodesk.com/portal/en/kb/articles/airlines-policy-delta-airlines-customer-service
https://customerservice24x7help.zohodesk.com/portal/en/kb/articles/service-care-delta-airlines-customer-service
https://officialairlinesservicesdeskcom.zohodesk.com/portal/en/kb/articles/1-866-838-4934-delta-airlines-check-in-28-8-2025
https://officialairlinesservicesdeskcom.zohodesk.com/portal/en/kb/articles/1-866-838-4934-delta-airlines-check-in-28-8-2025-2