https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/Full-List-of-Qatar-Airways-Customer-Contact-Numbers-in-USA-The-Ultimate-Detailed-Guide.pdf https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/Full-List-of-British-Airways-Customer-Contact-Numbers-in-USA-The-Ultimate-Detailed-Guide_0.pdf https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/Full-List-of-Air-Canada-Customer-Contact-Numbers-in-USA-The-Ultimate-Detailed-Guide.pdf