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

Chicago, IL (MDW) to San Diego, CA (SAN) flight delay odds

71.3% of 1,079 official scheduled MDW-to-SAN flights arrived on time; 15.6% arrived at least 30 minutes late and 1.3% 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
71.3%arrived on time
15.6%30+ min late
1.3%cancelled
1,079scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.5%all scheduled flights
120+ minutes late1.3%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+8.5 mincompleted flights

Which departure time was most reliable for MDW to SAN?

Among qualifying MDW-to-SAN departure window results, Early morning had the highest on-time rate: 85.1% of 342 flights. Late morning was lowest at 62.2% across 180 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning34285.1%6.1%0.3%
Late morning18062.2%19.4%1.1%
Afternoon21768.7%21.2%0.9%
Evening30566.9%18.0%2.0%

Which weekday was most reliable for MDW to SAN?

Among qualifying MDW-to-SAN weekday results, Wednesday had the highest on-time rate: 78.9% of 147 flights. Thursday was lowest at 68.7% across 166 flights.

DayFlightsOn time30+ minCancelled
Monday16669.3%15.7%1.8%
Tuesday15072.0%14.7%0.7%
Wednesday14778.9%10.2%1.4%
Thursday16668.7%20.5%1.8%
Friday16871.4%14.9%1.2%
Saturday13369.9%15.8%1.5%
Sunday14969.1%16.8%0.7%

Which airline was most reliable for MDW to SAN?

Only Southwest Airlines met the MDW-to-SAN airline threshold: 71.3% of 1,079 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines1,07971.3%15.6%1.3%

Which month was most reliable for MDW to SAN?

Among qualifying MDW-to-SAN month results, January 2026 had the highest on-time rate: 83.6% of 67 flights. June 2026 was lowest at 48.5% across 103 flights.

MonthFlightsOn time30+ minCancelled
July 20259373.1%17.2%1.1%
August 20258877.3%6.8%2.3%
September 20258674.4%15.1%0.0%
October 20258983.1%6.7%0.0%
November 20258674.4%12.8%3.5%
December 20259169.2%23.1%0.0%
January 20266783.6%10.4%0.0%
February 20266677.3%12.1%0.0%
March 202610270.6%17.6%2.9%
April 202610367.0%16.5%1.0%
May 202610566.7%18.1%1.0%
June 202610348.5%25.2%2.9%

What drove MDW to SAN delay minutes?

Late aircraft was the largest recorded MDW-to-SAN delay category, accounting for 36.4% of 13,411 BTS-attributed delay minutes during July 2025–June 2026.

Airline36.3%
Late aircraft36.4%
National airspace25.4%
Weather0.9%
Security1.0%
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.