https://forums.p-insurgence.com/t/full-list-of-delta-lines-customer-care/48557
https://www.flightsim.com/forums/topic/64545-list-of-delta-airlines%C2%AE-usa-support-phone-numbers-usa-comprehensive-2025-contact-guide/
https://www.flightsim.com/forums/topic/64542-list-of-american-airlines%C2%AE-usa-support-phone-numbers-usa-comprehensive-2025-contact-guide/
https://www.flightsim.com/forums/topic/64543-list-of-united-airlines%C2%AE-usa-support-phone-numbers-usa-comprehensive-2025-contact-guide/
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