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

Houston, TX (HOU) to Chicago, IL (MDW) flight delay odds

71.4% of 1,834 official scheduled HOU-to-MDW flights arrived on time; 15.2% arrived at least 30 minutes late and 1.1% 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
71.4%arrived on time
15.2%30+ min late
1.1%cancelled
1,834scheduled 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 late1.9%all scheduled flights
Diverted0.7%did not reach as scheduled
Average arrival+11.5 mincompleted flights

Which departure time was most reliable for HOU to MDW?

Among qualifying HOU-to-MDW departure window results, Early morning had the highest on-time rate: 86.1% of 518 flights. Night was lowest at 60.9% across 138 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning51886.1%5.4%0.8%
Late morning20580.5%5.4%2.0%
Afternoon51262.5%21.7%1.0%
Evening46163.8%21.7%0.9%
Night13860.9%21.0%2.2%

Which weekday was most reliable for HOU to MDW?

Among qualifying HOU-to-MDW weekday results, Tuesday had the highest on-time rate: 78.5% of 260 flights. Sunday was lowest at 63.0% across 254 flights.

DayFlightsOn time30+ minCancelled
Monday27867.6%16.9%1.4%
Tuesday26078.5%10.4%0.0%
Wednesday25172.9%12.7%0.4%
Thursday27172.7%13.7%1.5%
Friday27669.6%18.8%1.8%
Saturday24475.8%12.3%1.6%
Sunday25463.0%21.3%0.8%

Which airline was most reliable for HOU to MDW?

Only Southwest Airlines met the HOU-to-MDW airline threshold: 71.4% of 1,834 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,83471.4%15.2%1.1%

Which month was most reliable for HOU to MDW?

Among qualifying HOU-to-MDW month results, September 2025 had the highest on-time rate: 88.3% of 163 flights. June 2026 was lowest at 49.7% across 169 flights.

MonthFlightsOn time30+ minCancelled
July 202518762.0%20.3%1.6%
August 202516776.0%16.2%1.8%
September 202516388.3%6.7%0.6%
October 202515479.2%9.1%0.0%
November 202514569.7%12.4%5.5%
December 202514477.1%8.3%0.0%
January 202612983.7%4.7%0.8%
February 202611677.6%9.5%0.9%
March 202616157.8%23.6%1.2%
April 202615072.0%14.7%0.0%
May 202614970.5%16.1%0.0%
June 202616949.7%34.3%0.6%

What drove HOU to MDW delay minutes?

Late aircraft was the largest recorded HOU-to-MDW delay category, accounting for 42.6% of 24,756 BTS-attributed delay minutes during July 2025–June 2026.

Airline34.7%
Late aircraft42.6%
National airspace18.2%
Weather4.2%
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.