Https://collaboratory.gse.upenn.edu/sites/default/files/webform/air-canada-airlines-customer-services-usa-contact-number-full-2025-support-contact-guide_0.pdfhttps://collaboratory.gse.upenn.edu/sites/default/files/webform/air-canada-airlines-customer-services-usa-contact-number-full-2025-support-contact-guide_0.pdf https://collaboratory.gse.upenn.edu/sites/default/files/webform/air-canada-airlines-customer-services-usa-contact-number-full-2025-support-contact-guide_0.pdf