_Why is Allegiant airline phone number always busy? https://community.expensify.com/discussion/60911/why-is-allegiant-airline-phone-number-always-busy/p1?new=1 Why is Allegiant airline phone number always busy? High Demand for Customer Service: Allegiant Airlines' phone number, ₳1▶833✤✥460✤✥1838????, is frequently busy due to the high volume of calls they receive daily.