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

Dallas, TX (DAL) to Chicago, IL (MDW) flight delay odds

Historically, 68.9% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,154 flights.

HISTORICAL ROUTE SIGNALVariable
68.9%arrived on time
18.6%30+ min late
1.9%cancelled
2,154scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.8%all scheduled flights
120+ minutes late2.8%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+13.5 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 morning48289.4%5.0%1.5%
Late morning37675.5%9.8%1.9%
Afternoon62465.1%19.6%2.1%
Evening48852.9%33.0%2.0%
Night18457.6%30.4%2.2%

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
Monday32966.9%20.1%1.5%
Tuesday31576.8%14.6%1.6%
Wednesday30675.5%14.7%0.3%
Thursday32364.7%19.2%0.9%
Friday32666.9%21.8%3.1%
Saturday23668.6%16.5%3.4%
Sunday31963.6%22.3%2.8%

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 Airlines2,15468.9%18.6%1.9%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202520263.4%24.3%2.0%
August 202519271.4%19.3%0.0%
September 202519077.4%13.2%0.0%
October 202519579.0%13.3%0.5%
November 202517768.9%14.7%5.6%
December 202519172.3%15.7%0.5%
January 202615673.1%12.8%4.5%
February 202613780.3%8.8%0.7%
March 202617160.2%24.0%1.8%
April 202617268.0%18.0%1.7%
May 202617661.9%21.0%3.4%
June 202619554.4%33.8%2.6%

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.

Airline29.5%
Late aircraft50.4%
National airspace15.6%
Weather4.2%
Security0.3%
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.