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

San Jose, CA (SJC) to Chicago, IL (MDW) flight delay odds

82.2% of 538 official scheduled SJC-to-MDW flights arrived on time; 7.6% arrived at least 30 minutes late and 0.4% 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 SIGNALLower disruption
82.2%arrived on time
7.6%30+ min late
0.4%cancelled
538scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late1.3%all scheduled flights
120+ minutes late0.4%all scheduled flights
Diverted1.1%did not reach as scheduled
Average arrival-0.3 mincompleted flights

Which departure time was most reliable for SJC to MDW?

Among qualifying SJC-to-MDW departure window results, Night had the highest on-time rate: 94.1% of 118 flights. Late morning was lowest at 70.6% across 187 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning18790.4%2.1%0.5%
Late morning18770.6%12.3%0.5%
Night11894.1%4.2%0.0%

Which weekday was most reliable for SJC to MDW?

Among qualifying SJC-to-MDW weekday results, Saturday had the highest on-time rate: 91.8% of 61 flights. Monday was lowest at 75.0% across 84 flights.

DayFlightsOn time30+ minCancelled
Monday8475.0%15.5%0.0%
Tuesday8179.0%8.6%0.0%
Wednesday7887.2%7.7%0.0%
Thursday8481.0%7.1%0.0%
Friday8381.9%6.0%0.0%
Saturday6191.8%1.6%1.6%
Sunday6782.1%4.5%1.5%

Which airline was most reliable for SJC to MDW?

Only Southwest Airlines met the SJC-to-MDW airline threshold: 82.2% of 538 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines53882.2%7.6%0.4%

Which month was most reliable for SJC to MDW?

Among qualifying SJC-to-MDW month results, February 2026 had the highest on-time rate: 100.0% of 19 flights. May 2026 was lowest at 66.7% across 57 flights.

MonthFlightsOn time30+ minCancelled
July 20258073.8%11.2%1.2%
August 20255578.2%10.9%0.0%
September 20255286.5%0.0%0.0%
October 20253293.8%3.1%0.0%
November 20253090.0%0.0%0.0%
December 20253196.8%0.0%0.0%
February 202619100.0%0.0%0.0%
March 20265286.5%7.7%1.9%
April 20265685.7%5.4%0.0%
May 20265766.7%22.8%0.0%
June 20266078.3%8.3%0.0%

What drove SJC to MDW delay minutes?

Airline was the largest recorded SJC-to-MDW delay category, accounting for 43.3% of 3,131 BTS-attributed delay minutes during July 2025–June 2026.

Airline43.3%
Late aircraft37.0%
National airspace18.6%
Weather1.1%
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.