Https://collaboratory.gse.upenn.edu/sites/default/files/webform/full-list-of-united-airlines-customer-service-247-live-person-support-numbers-a-complete-guide.pdf https://collaboratory.gse.upenn.edu/sites/default/files/webform/full-list-of-united-airlines-customer-service-247-live-person-support-numbers-a-complete-guide.pdf https://collaboratory.gse.upenn.edu/sites/default/files... https://collaboratory.gse.upenn.edu/sites/default/files/webform/full-list-of-united-airlines-customer-service-247-live-person-support-numbers-a-complete-guide.pdf