Https://amtrakoig.gov/sites/default/files/webform/foia_form/_sid_/united-airlines%C2%AE%20usa-customer-service-number-the-complete-2025-guide.pdf https://amtrakoig.gov/sites/default/files/webform/foia_form/_sid_/united-airlines%C2%AE%20usa-customer-service-number-the-complete-2025-guide.pdf