https://foreverpontiac.com/forums/topic/21758-united-airlines%C2%AE%EF%B8%8F-customer-service%E2%84%A2%EF%B8%8F-usa-contact-numbers-a-complete-2025-guide/ https://forums.homedialysis.org/t/united-airlines-customer-service-usa-contact-numbers-complete-2025-guide/10927