https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/full-list-of-qatar-airways-customer-contact-numbers-in-usa-the-detailed-guide.pdf https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/full-list-of-british-airways-customer-contact-numbers-in-usa-the-detailed-guide.pdf https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/full-list-of-air-canada-customer-contact-numbers-in-usa-the-detailed-guide.pdf