BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
MDW→MIA

Chicago, IL (MDW) to Miami, FL (MIA) flight delay odds

72.2% of 511 official scheduled MDW-to-MIA flights arrived on time; 16.8% arrived at least 30 minutes late and 1.2% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
72.2%arrived on time
16.8%30+ min late
1.2%cancelled
511scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.4%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+10.3 mincompleted flights

Which departure time was most reliable for MDW to MIA?

Among qualifying MDW-to-MIA departure window results, Late morning had the highest on-time rate: 81.9% of 94 flights. Afternoon was lowest at 59.8% across 82 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning21675.5%15.3%0.0%
Late morning9481.9%8.5%1.1%
Afternoon8259.8%25.6%0.0%
Evening11866.9%20.3%4.2%

Which weekday was most reliable for MDW to MIA?

Among qualifying MDW-to-MIA weekday results, Tuesday had the highest on-time rate: 85.4% of 41 flights. Saturday was lowest at 64.2% across 109 flights.

DayFlightsOn time30+ minCancelled
Monday7875.6%19.2%2.6%
Tuesday4185.4%2.4%0.0%
Wednesday4481.8%11.4%0.0%
Thursday7569.3%20.0%1.3%
Friday7574.7%16.0%0.0%
Saturday10964.2%21.1%1.8%
Sunday8968.5%16.9%1.1%

Which airline was most reliable for MDW to MIA?

Among qualifying MDW-to-MIA airline results, Frontier Airlines had the highest on-time rate: 73.4% of 64 flights. Southwest Airlines was lowest at 72.0% across 447 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines44772.0%15.9%1.1%
Frontier Airlines6473.4%23.4%1.6%

Which month was most reliable for MDW to MIA?

Among qualifying MDW-to-MIA month results, October 2025 had the highest on-time rate: 95.8% of 24 flights. August 2025 was lowest at 62.1% across 29 flights.

MonthFlightsOn time30+ minCancelled
July 20253971.8%17.9%0.0%
August 20252962.1%27.6%0.0%
September 20252580.0%16.0%0.0%
October 20252495.8%0.0%0.0%
November 20253976.9%10.3%7.7%
December 20254562.2%28.9%0.0%
January 20265162.7%23.5%0.0%
February 20263884.2%10.5%0.0%
March 20267967.1%19.0%2.5%
April 20265874.1%15.5%1.7%
May 20265379.2%13.2%0.0%
June 20263164.5%9.7%0.0%

What drove MDW to MIA delay minutes?

Late aircraft was the largest recorded MDW-to-MIA delay category, accounting for 36.9% of 7,049 BTS-attributed delay minutes during July 2025–June 2026.

Airline33.6%
Late aircraft36.9%
National airspace29.0%
Weather0.5%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.