Https://www.mrbusiness.ca/articles/full-list-of-united-airlines-customer-service%E2%84%A2-usa-contact-numbers-a-step-by-step-guide-2641 https://www.mrbusiness.ca/articles/full-list-of-united-airlines-customer-service%E2%84%A2-usa-contact-numbers-a-step-by-step-guide-2641