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

Baltimore, MD (BWI) to Chicago, IL (MDW) flight delay odds

73.7% of 1,844 official scheduled BWI-to-MDW flights arrived on time; 15.6% arrived at least 30 minutes late and 2.1% 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
73.7%arrived on time
15.6%30+ min late
2.1%cancelled
1,844scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.2%all scheduled flights
120+ minutes late3.1%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+9.6 mincompleted flights

Which departure time was most reliable for BWI to MDW?

Among qualifying BWI-to-MDW departure window results, Early morning had the highest on-time rate: 89.4% of 425 flights. Night was lowest at 51.9% across 156 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning42589.4%4.7%0.9%
Late morning24082.5%8.8%2.1%
Afternoon51675.0%14.5%2.1%
Evening50761.7%25.2%2.0%
Night15651.9%28.2%5.8%

Which weekday was most reliable for BWI to MDW?

Among qualifying BWI-to-MDW weekday results, Tuesday had the highest on-time rate: 77.6% of 246 flights. Monday was lowest at 69.2% across 289 flights.

DayFlightsOn time30+ minCancelled
Monday28969.2%18.7%2.4%
Tuesday24677.6%11.4%0.8%
Wednesday24377.4%13.6%1.6%
Thursday27374.0%16.8%1.1%
Friday28972.3%15.2%2.4%
Saturday21875.7%14.7%2.8%
Sunday28671.3%17.8%3.5%

Which airline was most reliable for BWI to MDW?

Among qualifying BWI-to-MDW airline results, Southwest Airlines had the highest on-time rate: 74.0% of 1,760 flights. Frontier Airlines was lowest at 66.7% across 84 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,76074.0%15.3%2.1%
Frontier Airlines8466.7%21.4%2.4%

Which month was most reliable for BWI to MDW?

Among qualifying BWI-to-MDW month results, September 2025 had the highest on-time rate: 85.6% of 181 flights. July 2025 was lowest at 59.4% across 187 flights.

MonthFlightsOn time30+ minCancelled
July 202518759.4%27.8%4.3%
August 202518373.2%18.0%0.5%
September 202518185.6%8.3%0.6%
October 202518476.6%9.8%0.0%
November 202515974.8%11.3%6.3%
December 202513863.8%21.7%1.4%
January 202612781.9%7.9%3.9%
February 202611778.6%9.4%3.4%
March 202612564.8%21.6%4.0%
April 202613281.1%9.1%0.8%
May 202614079.3%12.9%0.0%
June 202617167.8%25.7%1.2%

What drove BWI to MDW delay minutes?

Late aircraft was the largest recorded BWI-to-MDW delay category, accounting for 49.6% of 27,754 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.3%
Late aircraft49.6%
National airspace18.7%
Weather5.2%
Security0.2%
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.