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

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

Historically, 72.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,312 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

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

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.