https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/full-list-of-southwest-airlines-customer-contact-numbers-in-usa-the-detailed-guide.pdf https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/full-list-of-alaska-airlines-customer-service-usa-contact-numbers-a-step-by-step-guide.pdf https://ppf.ucsf.edu/sites/ppf.ucsf.edu/files/webform/full-list-of-british-airways-customer-service-usa-contact-numbers-a-step-by-step-guide.pdf