ATL (Atlanta) to ORD (Chicago) flights arrive on time 75% of the time. The most reliable airline on this route is SkyWest Airlines at 88%. The average delay is 75 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated October 2026.ATL → ORD
ATL (Atlanta) to ORD (Chicago)
ATL → ORD on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is delayed fairly often. About 75% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
SkyWest Airlines is significantly more reliable on this route at 88% on time vs Frontier Airlines at 66%.
Airline Comparison
SkyWest Airlines leads at 88% on time; Frontier Airlines trails at 66%.
Accurate?
Good to know
Departing from ATL
81% on timeExpect ~17 min sitting on the taxiway after your gate pushes back. ATL has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at ORD
77% on timeWhen flights into ORD are late, the average delay is 79 minutes. Build buffer if you have ground plans.
If connecting at ORD: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what SkyWest Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of ATL? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated October 2026. Source: Bureau of Transportation Statistics.