Understanding cabin baggage rules for major US low-cost airlines

Navigating cabin baggage policies for low-cost airlines in the U.S. can be complex, as each airline has different rules. This overview highlights the baggage restrictions for five major carriers: Spirit, Allegiant, Frontier, Southwest, and Avelo. Spirit Airlines allows one free personal item with specific size limits and charges for carry-on bags. Allegiant and Frontier have similar policies, permitting one free personal item and charging for carry-ons, with weight limits in place. Southwest Airlines stands out by allowing both a free carry-on and personal item. Avelo Airlines also permits one free personal item and charges for carry-ons, with weight restrictions. Travelers should check each airline's specific rules to avoid extra fees.