MDW (Chicago) to ATL (Atlanta) flights arrive on time 82% of the time. The most reliable airline on this route is Delta Air Lines at 87%. The average delay is 69 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated July 2026.MDW → ATL
MDW (Chicago) to ATL (Atlanta)
MDW → ATL on-time performance by month
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This route is on time most of the time. About 82% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Delta Air Lines is significantly more reliable on this route at 87% on time vs Frontier Airlines at 70%.
Airline Comparison
Delta Air Lines leads at 87% on time; Frontier Airlines trails at 70%.
Accurate?
Good to know
Departing from MDW
80% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at ATL
80% on timeWhen flights into ATL are late, the average delay is 72 minutes. Build buffer if you have ground plans.
If connecting at ATL: 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 MDW? 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.