https://collaboratory.gse.upenn.edu/sites/default/files/webform/Full-List-Of-American-Airlines-Customer-Service-24-7-Live-Person-Support-Numbers-A-Complete-G-Uide.pdf https://collaboratory.gse.upenn.edu/sites/default/files/webform/Full-List-Of-United-Airlines-Customer-Service-24-7-Live-Person-Support-Numbers-A-Complete-G-Uide.pdf https://collaboratory.gse.upenn.edu/sites/default/files/webform/Air-Canada-Customer-Usa-Contact-Numbers-A-Simple-Step-Guide_0.pdf https://collaboratory.gse.upenn.edu/sites/default/files/webform/Alaska-Air-Customer-Servicetm-Usa-Directly-Contact-Numbers-In-Detail-Guide.pdf https://collaboratory.gse.upenn.edu/sites/default/files/webform/Alaska-Airlines-Customer-Usa-Contact-Numbers-A-Simple-Step-Guide.pdf