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

Denver, CO (DEN) to Chicago, IL (MDW) flight delay odds

72.1% of 2,312 official scheduled DEN-to-MDW flights arrived on time; 16.3% arrived at least 30 minutes late and 1.9% 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
72.1%arrived on time
16.3%30+ min late
1.9%cancelled
2,312scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.0%all scheduled flights
120+ minutes late2.7%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+10.5 mincompleted flights

Which departure time was most reliable for DEN to MDW?

Among qualifying DEN-to-MDW departure window results, Early morning had the highest on-time rate: 90.8% of 607 flights. Evening was lowest at 48.7% across 604 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning60790.8%3.6%1.8%
Late morning38581.3%7.5%2.1%
Afternoon67272.3%15.0%1.8%
Evening60448.7%34.1%1.8%
Night4452.3%43.2%2.3%

Which weekday was most reliable for DEN to MDW?

Among qualifying DEN-to-MDW weekday results, Wednesday had the highest on-time rate: 79.5% of 303 flights. Thursday was lowest at 65.9% across 346 flights.

DayFlightsOn time30+ minCancelled
Monday36572.6%16.7%0.3%
Tuesday31678.2%13.3%0.9%
Wednesday30379.5%10.6%2.6%
Thursday34665.9%20.2%2.3%
Friday36671.9%15.6%2.5%
Saturday25672.3%16.4%2.3%
Sunday36066.1%20.3%2.2%

Which airline was most reliable for DEN to MDW?

Among qualifying DEN-to-MDW airline results, Southwest Airlines had the highest on-time rate: 72.2% of 2,218 flights. Frontier Airlines was lowest at 69.1% across 94 flights.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines2,21872.2%16.1%1.9%
Frontier Airlines9469.1%21.3%1.1%

Which month was most reliable for DEN to MDW?

Among qualifying DEN-to-MDW month results, January 2026 had the highest on-time rate: 85.9% of 156 flights. June 2026 was lowest at 59.7% across 201 flights.

MonthFlightsOn time30+ minCancelled
July 202529962.5%24.4%2.7%
August 202522464.7%21.9%0.4%
September 202520378.8%12.3%0.0%
October 202521483.6%11.2%0.0%
November 202518778.1%9.1%7.0%
December 202519570.3%16.4%1.0%
January 202615685.9%8.3%0.0%
February 202613877.5%13.0%0.7%
March 202617166.1%15.2%4.7%
April 202616173.3%15.5%3.1%
May 202616374.2%14.7%0.6%
June 202620159.7%25.4%2.0%

What drove DEN to MDW delay minutes?

Late aircraft was the largest recorded DEN-to-MDW delay category, accounting for 47.7% of 34,169 BTS-attributed delay minutes during July 2025–June 2026.

Airline36.2%
Late aircraft47.7%
National airspace14.7%
Weather1.3%
Security0.1%
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.