Https://www.minimania.com/msgThread/129403/1/1/United_Customer_Service_USA_Directly_Contact_Numbers_-_In_Detail https://www.minimania.com/msgThread/129406/1/1/Lufthansa_Airlines_USA_Contact_Numbers__Complete_2025_Support_Guide https://www.minimania.com/msgThread/129408/1/1/Frontier_Airlines_USA_Contact_Numbers_A_Official_Guide https://www.minimania.com/msgThread/129412/1/1/Full_Lis... https://www.minimania.com/msgThread/129406/1/1/Lufthansa_Airlines_USA_Contact_Numbers__Complete_2025_Support_Guide