MDW (Chicago) to MIA (Miami) flights arrive on time 76% of the time. The most reliable airline on this route is Southwest Airlines at 78%. The average delay is 81 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated March 2026.MDW → MIA
MDW (Chicago) to MIA (Miami)
MDW → MIA on-time performance by month
24
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is on time most of the time. About 76% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Southwest Airlines edges out Frontier Airlines on this route — 78% vs 71% on time.
Airline Comparison
Southwest Airlines leads at 78% on time; Frontier Airlines trails at 71%.
Accurate?
Good to know
Departing from MDW
78% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at MIA
76% on timeWhen flights into MIA are late, the average delay is 75 minutes. Build buffer if you have ground plans.
If connecting at MIA: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
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Data last updated March 2026. Source: Bureau of Transportation Statistics.