Guided Updated detail to know how do I speak to a live person at Allegiant Air Travelers should Dial the Allegiant Air Customer Service number 1-702-505-8888 to speak with their representative. Now you must follow IVR instructions which are explained here. You should Press 1 for the selection of your Preferred Language. Press 2 to book new reservations for domestic and international flights to different locations. Press 3 to change or cancel the existing itinerary. Press 4 to report the problem related to Airline Services. Press 5 to speak with the customer service representative. It would be great if passengers waited a few minutes to connect with them once the call was associated with the support team member in this way a new traveler can resolve stuck issue of how do I speak to a live person at Allegiant Air?.. You are allowed to share the necessary information related to the problem to get it resolved.