ATL (Atlanta) to MDW (Chicago) flights arrive on time 79% of the time. The most reliable airline on this route is Delta Air Lines at 83%. The average delay is 66 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated July 2026.ATL → MDW
ATL (Atlanta) to MDW (Chicago)
ATL → MDW on-time performance by month
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This route is on time most of the time. About 79% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Delta Air Lines is significantly more reliable on this route at 83% on time vs Frontier Airlines at 65%.
Airline Comparison
Delta Air Lines leads at 83% on time; Frontier Airlines trails at 65%.
Accurate?
Good to know
Departing from ATL
80% 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 MDW
80% on timeWhen flights into MDW are late, the average delay is 58 minutes. Build buffer if you have ground plans.
If connecting at MDW: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Delta Air Lines 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 July 2026. Source: Bureau of Transportation Statistics.