Yes, you can absolutely walk between all terminals and concourses at Hartsfield-Jackson Atlanta International Airport (ATL). While the "Plane Train" is the fastest way to move, a subterranean pedestrian mall (level 0) connects all concourses (T, A, B, C, D, E, and F). Walking from Concourse A to Concourse F takes approximately 35 minutes, while moving between adjacent concourses typically takes about 5 to 10 minutes. In 2026, this walkway is highly recommended for travelers with long layovers, as it features moving sidewalks, permanent art exhibits, and historical displays about the city of Atlanta. Note that while you can walk between all concourses after security, moving between the Domestic and International terminals before security still requires a shuttle bus, as they are located on opposite sides of the massive airfield and are not connected by a public pre-security walkway.