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

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

74.5% of 6,964 official scheduled LAX-to-ORD flights arrived on time; 15.1% arrived at least 30 minutes late and 1.7% 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
74.5%arrived on time
15.1%30+ min late
1.7%cancelled
6,964scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.0%all scheduled flights
120+ minutes late4.1%all scheduled flights
Diverted0.8%did not reach as scheduled
Average arrival+10.9 mincompleted flights

Which departure time was most reliable for LAX to ORD?

Among qualifying LAX-to-ORD departure window results, Early morning had the highest on-time rate: 87.2% of 1,668 flights. Afternoon was lowest at 64.6% across 1,657 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,66887.2%6.5%0.9%
Late morning1,30368.9%19.9%1.4%
Afternoon1,65764.6%21.5%2.2%
Evening74273.9%18.5%1.1%
Night1,59476.6%12.0%2.4%

Which weekday was most reliable for LAX to ORD?

Among qualifying LAX-to-ORD weekday results, Tuesday had the highest on-time rate: 80.2% of 980 flights. Sunday was lowest at 70.1% across 1,026 flights.

DayFlightsOn time30+ minCancelled
Monday1,04072.3%16.5%1.6%
Tuesday98080.2%11.4%0.9%
Wednesday93475.3%14.6%1.5%
Thursday1,02776.0%13.4%1.9%
Friday1,04075.9%14.1%2.0%
Saturday91772.1%16.4%2.0%
Sunday1,02670.1%19.2%1.9%

Which airline was most reliable for LAX to ORD?

Among qualifying LAX-to-ORD airline results, United Airlines had the highest on-time rate: 79.4% of 3,380 flights. Frontier Airlines was lowest at 58.1% across 227 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines3,38079.4%11.0%0.7%
American Airlines3,05170.6%18.4%2.3%
Spirit Airlines24074.2%15.0%4.2%
Frontier Airlines22758.1%29.1%4.8%
Delta Air Lines6665.2%25.8%0.0%

Which month was most reliable for LAX to ORD?

Among qualifying LAX-to-ORD month results, February 2026 had the highest on-time rate: 83.4% of 453 flights. March 2026 was lowest at 66.1% across 549 flights.

MonthFlightsOn time30+ minCancelled
July 202568874.0%15.4%3.6%
August 202566871.6%16.0%1.9%
September 202561481.4%11.1%0.2%
October 202556480.5%11.2%0.2%
November 202558468.5%17.6%3.8%
December 202556972.1%16.7%1.2%
January 202646375.6%13.6%1.7%
February 202645383.4%9.1%0.0%
March 202654966.1%20.2%3.1%
April 202655275.9%13.6%1.3%
May 202660176.7%14.3%0.7%
June 202665971.2%20.3%1.8%

What drove LAX to ORD delay minutes?

Late aircraft was the largest recorded LAX-to-ORD delay category, accounting for 43.1% of 137,932 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.0%
Late aircraft43.1%
National airspace25.1%
Weather1.7%
Security0.2%
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.