https://amtrakoig.gov/sites/default/files/webform/foia_form/_sid_/american-airlines-customer-service-usa-a-complete-guide-to-contact-numbers.pdf

https://www.aaalac.org/AAALAC/assets/File/mo_application_form/1754781904045_full-list-of-allegiant-airlines-customer-contact-numbers-in-usa-a-ultimate-step-by-step-guidee.pdf

https://www.aaalac.org/AAALAC/assets/File/mo_application_form/1754781628284_Allegiant-Airlines%C2%AE?-Customer%C2%AE?-USA-contact-Numbers-A-Step-By-Step-Guide-.pdf

https://www.aaalac.org/AAALAC/assets/File/mo_application_form/1754780087797_5-five-proven-methods-to-speak-to-live-agent-at-southwest-airline-a-complete-2025-guide.pdf

https://airwayshelpingagent.zohodesk.com/portal/en/kb/articles/united-economypolicy-what-is-the-cancellation-policy-for-united-basic-economy-full-details

https://www.aaalac.org/AAALAC/assets/File/mo_application_form/1754780329305_Delta-Airlines%C2%AE?-Customer%C2%AE?-USA-contact-Numbers-A-Step-By-Step-Guidee.pdf

https://www.wikiloc.com/walking-trails/united-r-2025-latest-airline-contact-numbers-usa-speak-directly-with-united-customer-care-225965795

https://www.aaalac.org/AAALAC/assets/File/mo_application_form/1754780329305_how-to-speak-to-a-live-agent-at-american-air-by-phone-email-chat-for-flight-booking-and-refund-supportt.pdf

https://www.wikiloc.com/hiking-trails/full-list-of-official-expedi-customer-contact-numbers-in-usa-2025-in-depth-guide-225965511

https://www.aaalac.org/AAALAC/assets/File/mo_application_form/1754780329305_how-to-speak-to-a-live-agent-at-united-air-by-phone-email-chat-for-flight-booking-and-refund-supportt.pdf