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

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

71.3% of 6,961 official scheduled ORD-to-LAX flights arrived on time; 17.6% arrived at least 30 minutes late and 1.6% 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
17.6%30+ min late
1.6%cancelled
6,961scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.9%all scheduled flights
120+ minutes late4.2%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+12.8 mincompleted flights

Which departure time was most reliable for ORD to LAX?

Among qualifying ORD-to-LAX departure window results, Early morning had the highest on-time rate: 81.4% of 1,751 flights. Evening was lowest at 59.2% across 1,703 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,75181.4%9.4%1.9%
Late morning1,10676.1%14.7%0.7%
Afternoon1,89172.3%18.1%0.8%
Evening1,70359.2%25.6%2.2%
Night51062.2%23.3%3.1%

Which weekday was most reliable for ORD to LAX?

Among qualifying ORD-to-LAX weekday results, Tuesday had the highest on-time rate: 75.7% of 967 flights. Sunday was lowest at 66.9% across 1,036 flights.

DayFlightsOn time30+ minCancelled
Monday1,04070.4%18.7%1.4%
Tuesday96775.7%14.7%1.0%
Wednesday93872.9%17.2%1.2%
Thursday1,03073.3%15.3%2.0%
Friday1,03370.8%16.4%1.6%
Saturday91769.2%19.0%1.6%
Sunday1,03666.9%21.8%2.1%

Which airline was most reliable for ORD to LAX?

Among qualifying ORD-to-LAX airline results, United Airlines had the highest on-time rate: 75.9% of 3,380 flights. Delta Air Lines was lowest at 60.6% across 66 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines3,38075.9%14.8%0.7%
American Airlines3,05266.9%20.1%2.3%
Spirit Airlines23571.9%17.9%3.4%
Frontier Airlines22863.2%22.4%4.8%
Delta Air Lines6660.6%25.8%0.0%

Which month was most reliable for ORD to LAX?

Among qualifying ORD-to-LAX month results, September 2025 had the highest on-time rate: 81.0% of 616 flights. June 2026 was lowest at 62.0% across 658 flights.

MonthFlightsOn time30+ minCancelled
July 202568765.9%20.7%3.6%
August 202566471.1%18.2%1.7%
September 202561681.0%11.4%0.3%
October 202556572.6%13.8%0.0%
November 202558875.0%15.5%3.6%
December 202556866.5%20.1%1.6%
January 202646369.8%17.1%1.1%
February 202645178.7%13.5%0.0%
March 202654972.3%16.6%2.9%
April 202655164.2%23.4%1.5%
May 202660178.5%13.0%0.5%
June 202665862.0%25.8%1.7%

What drove ORD to LAX delay minutes?

Late aircraft was the largest recorded ORD-to-LAX delay category, accounting for 42.2% of 137,149 BTS-attributed delay minutes during July 2025–June 2026.

Airline32.7%
Late aircraft42.2%
National airspace16.8%
Weather8.1%
Security0.1%
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.