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

Los Angeles, CA (LAX) to Chicago, IL (MDW) flight delay odds

Historically, 78.0% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,328 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
78.0%arrived on time
10.7%30+ min late
0.5%cancelled
1,328scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.0%all scheduled flights
120+ minutes late0.8%all scheduled flights
Diverted0.8%did not reach as scheduled
Average arrival+3.6 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 morning41789.7%3.1%0.7%
Late morning20170.1%13.4%0.0%
Afternoon29562.7%19.7%1.0%
Evening5048.0%40.0%0.0%
Night36585.5%6.6%0.3%

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
Monday20374.9%14.3%0.5%
Tuesday19281.8%11.5%0.0%
Wednesday18485.9%6.0%0.0%
Thursday19874.2%13.6%0.5%
Friday20575.6%13.7%0.5%
Saturday16182.6%1.9%0.6%
Sunday18572.4%11.9%1.6%

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 Airlines1,32878.0%10.7%0.5%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202514680.1%13.0%0.0%
August 202512180.2%7.4%0.8%
September 202511689.7%4.3%0.0%
October 202511978.2%9.2%0.0%
November 202510678.3%7.5%1.9%
December 202511579.1%12.2%0.0%
January 20269784.5%10.3%0.0%
February 20268483.3%6.0%0.0%
March 202610562.9%13.3%3.8%
April 202610372.8%13.6%0.0%
May 202610674.5%13.2%0.0%
June 202611071.8%17.3%0.0%

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.

Airline44.1%
Late aircraft39.1%
National airspace16.1%
Weather0.7%
Security0.0%
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.