Is a 2½ hr layover in Atlanta long enough?

ATL · The William B Hartsfield Atlanta International · Atlanta, United States
Probably Enough
More than enough for any connection. You could visit the airport's art installations along the underground walkway.
Concourses
7
Max Transit
15m
Avg. Security
10m
Primary Hub
Delta Air Lines
Domestic → Domestic
35min
Domestic → International
40min
International → Domestic
85min
International → International
90min
AD PLACEMENT — CONTEXTUAL
Delta connections between Concourses A–B rarely need more than 20 minutes — 45 is comfortable.
International arrivals in Concourse F require customs — budget 85+ minutes for any domestic connection.
Sit near the front of your inbound flight — every minute counts on tight connections.
TSA PreCheck at the main checkpoint is typically under 5 minutes.
The Plane Train is faster than walking for anything more than one concourse away.
12a6a12p6p12a
Low risk
Moderate
High risk
Tight connections are safer outside peak hours. Morning rush (6–9a), midday (11a–2p), and evening (4–8p) are highest risk.
The Plane Train automated people mover runs underground between all seven concourses, departing every 1–2 minutes. A full end-to-end ride takes about 10 minutes. Walking between adjacent concourses takes roughly 10 minutes via the underground walkway. International arrivals in Concourse F must clear U.S. customs and immigration before connecting to any other concourse — there is no sterile transit option.
Is 2½ hours enough for a layover at ATL?

More than enough for any connection. You could visit the airport's art installations along the underground walkway.

AD PLACEMENT — BEFORE FOOTER