https://www.emutalk.net/threads/united-airlines-international-customer-service-phone-number-and-support.60548/

https://www.perio.org/wp-content/uploads/ninja-forms/40/How-to-Call-Southwest-Airlines-Customer-Service-Full-Step-By-Step.pdf

https://www.emutalk.net/threads/united-airlines-group-booking-phone-number-reserve-discounted-group-tickets.60560/

https://www.perio.org/wp-content/uploads/ninja-forms/40/How-to-Speak-Southwest-Airlines-Customer-Service-13-Ways-That-Actually-Work.pdf

https://www.emutalk.net/threads/how-to-book-united-airlines-group-flights-and-contact-group-booking-helpline.60574/