The most convenient and fastest way +̳1̳ ̳8̳8̳8̳ ̳(̳5̳5̳6̳)̳ ̳8̳0̳6̳8̳ to speak to someone at Frontier Airlines is by calling their customer service number at +̳1̳ ̳8̳8̳8̳ ̳(̳5̳5̳6̳)̳ ̳8̳0̳6̳8̳ . Alternatively, you can start a chat conversation online for assistance. https://www.tripadvisor.com/ShowTopic-g1-i10702-k15077439-Frontier_Air_Help_Contact_by_Phone_Email_or_Chat-Air_Travel.html