https://www.expat.com/en/forum/north-america/usa/1100343-talk-to-a-live-person-at-united-airlines-2025-customer-guide.html

https://www.independent.com/wp-content/uploads/ninja-forms/11/how-to-contact-united-airlines-international-customer-service-talk-to-a-real-person-fast.pdf

https://www.independent.com/wp-content/uploads/ninja-forms/11/united-airlines-customer-service-phone-number-speak-to-a-live-agent-at-1-844-243-6776.pdf

https://www.expat.com/en/forum/south-america/colombia/1100381-need-a-refund-contact-united-airlines-refund-customer-service-quickly.html

https://www.expat.com/en/forum/north-america/usa/1100413-how-to-contact-united-airlines-for-international-flight-support.html