Allegiant Air Carry-on Luggage Rules
Allegiant Air's carry-on luggage policy allows each passenger to bring one personal item and one carry-on bag. The Allegiant Air carry-on baggage size limit is 22.0 × 16.0 × 10.0 in (approx 55 × 40 × 25 cm). The airline allows one personal item per passenger, such as a purse, small backpack, or laptop bag; the personal item size limit is 18.0 × 14.0 × 8.0 in (approx 45 × 35 × 20 cm).
While some sources mention a weight limit of -- for Allegiant Air carry-on baggage, other sources state that Allegiant Air does not specify a weight limit for carry-on bags. Regardless, you should be able to lift your carry-on into the overhead bin without assistance. Be sure to reserve your Allegiant Air baggage allowance in advance online, as fees increase at the airport.