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

Philadelphia, PA (PHL) to Chicago, IL (MDW) flight delay odds

71.6% of 1,528 official scheduled PHL-to-MDW flights arrived on time; 16.5% arrived at least 30 minutes late and 1.6% 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
71.6%arrived on time
16.5%30+ min late
1.6%cancelled
1,528scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.6%all scheduled flights
120+ minutes late3.6%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+14.4 mincompleted flights

Which departure time was most reliable for PHL to MDW?

Among qualifying PHL-to-MDW departure window results, Early morning had the highest on-time rate: 87.0% of 392 flights. Evening was lowest at 47.4% across 424 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning39287.0%6.6%1.3%
Late morning21783.4%8.3%1.8%
Afternoon47875.5%13.6%1.7%
Evening42447.4%32.3%1.4%

Which weekday was most reliable for PHL to MDW?

Among qualifying PHL-to-MDW weekday results, Tuesday had the highest on-time rate: 80.8% of 219 flights. Sunday was lowest at 62.2% across 230 flights.

DayFlightsOn time30+ minCancelled
Monday23766.2%21.9%2.5%
Tuesday21980.8%10.0%0.9%
Wednesday21378.4%11.7%0.9%
Thursday22767.0%16.7%1.8%
Friday23575.3%14.5%0.4%
Saturday16772.5%15.0%3.0%
Sunday23062.2%24.3%1.7%

Which airline was most reliable for PHL to MDW?

Among qualifying PHL-to-MDW airline results, Frontier Airlines had the highest on-time rate: 76.9% of 78 flights. Southwest Airlines was lowest at 71.3% across 1,450 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,45071.3%16.4%1.5%
Frontier Airlines7876.9%17.9%2.6%

Which month was most reliable for PHL to MDW?

Among qualifying PHL-to-MDW month results, September 2025 had the highest on-time rate: 84.3% of 159 flights. July 2025 was lowest at 53.2% across 154 flights.

MonthFlightsOn time30+ minCancelled
July 202515453.2%33.1%2.6%
August 202515675.0%14.7%0.6%
September 202515984.3%8.2%0.0%
October 202515576.8%14.2%0.0%
November 202513672.1%11.8%5.9%
December 202512259.0%28.7%0.0%
January 20269672.9%15.6%3.1%
February 20268479.8%6.0%3.6%
March 20269361.3%21.5%3.2%
April 202611182.0%5.4%0.0%
May 202611973.9%15.1%0.0%
June 202614369.2%19.6%1.4%

What drove PHL to MDW delay minutes?

Late aircraft was the largest recorded PHL-to-MDW delay category, accounting for 47.3% of 27,573 BTS-attributed delay minutes during July 2025–June 2026.

Airline25.1%
Late aircraft47.3%
National airspace24.7%
Weather2.8%
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.