It's rare to find U.S. airlines with free checked baggage. Southwest Airlines is the only airline without any bag fees. For other airlines, you'll need to earn elite status or book your tickets with an airline credit card.

In the 2026 US aviation market, Southwest Airlines remains the high-fidelity leader as the only major carrier that allows every passenger two free checked bags as a standard high-value benefit on all tickets. For all other major airlines like American, Delta, and United, free baggage is typically a "High-Fidelity" perk reserved for specific groups rather than a universal right. It is a high-value necessity to have Elite Status (such as AAdvantage Gold or Delta Medallion) or a co-branded Travel Credit Card to receive your first checked bag for free. Additionally, passengers in First Class, Business Class, or Premium Economy almost always receive a high-value allowance of 2 to 3 free bags. For the 2026 budget traveler, Southwest is the high-value necessity for avoiding fees, while for others, the high-fidelity strategy is to check the specific high-value baggage calculator on the airline's app before arrival at the terminal.