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

Las Vegas, NV (LAS) to Chicago, IL (ORD) flight delay odds

75.0% of 5,297 official scheduled LAS-to-ORD flights arrived on time; 15.6% arrived at least 30 minutes late and 1.2% 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
75.0%arrived on time
15.6%30+ min late
1.2%cancelled
5,297scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.1%all scheduled flights
120+ minutes late3.5%all scheduled flights
Diverted0.7%did not reach as scheduled
Average arrival+8.7 mincompleted flights

Which departure time was most reliable for LAS to ORD?

Among qualifying LAS-to-ORD departure window results, Early morning had the highest on-time rate: 85.6% of 1,089 flights. Afternoon was lowest at 64.0% across 1,709 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,08985.6%7.6%1.0%
Late morning1,06180.2%12.0%0.7%
Afternoon1,70964.0%22.9%1.2%
Evening52570.3%21.3%1.3%
Night91379.6%12.5%2.3%

Which weekday was most reliable for LAS to ORD?

Among qualifying LAS-to-ORD weekday results, Tuesday had the highest on-time rate: 81.5% of 728 flights. Monday was lowest at 70.6% across 803 flights.

DayFlightsOn time30+ minCancelled
Monday80370.6%20.2%1.7%
Tuesday72881.5%10.9%0.5%
Wednesday69677.3%14.8%0.7%
Thursday76675.2%15.1%1.2%
Friday81070.7%17.8%1.2%
Saturday68577.1%14.3%1.2%
Sunday80973.8%15.6%2.0%

Which airline was most reliable for LAS to ORD?

Among qualifying LAS-to-ORD airline results, Spirit Airlines had the highest on-time rate: 82.3% of 266 flights. Frontier Airlines was lowest at 65.2% across 184 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines2,33078.5%13.9%0.4%
American Airlines1,84873.9%16.7%2.3%
Southwest Airlines66965.5%20.0%0.3%
Spirit Airlines26682.3%8.3%1.5%
Frontier Airlines18465.2%21.7%4.3%

Which month was most reliable for LAS to ORD?

Among qualifying LAS-to-ORD month results, February 2026 had the highest on-time rate: 84.3% of 394 flights. March 2026 was lowest at 67.5% across 489 flights.

MonthFlightsOn time30+ minCancelled
July 202547969.5%19.4%1.7%
August 202548575.7%13.6%2.1%
September 202548177.1%15.2%0.6%
October 202548278.0%14.9%0.0%
November 202539071.8%19.5%2.6%
December 202535975.2%17.3%0.8%
January 202635677.8%13.5%0.6%
February 202639484.3%8.9%0.0%
March 202648967.5%19.2%3.1%
April 202650473.0%14.9%1.6%
May 202648378.5%12.6%0.0%
June 202639573.2%18.5%1.8%

What drove LAS to ORD delay minutes?

Late aircraft was the largest recorded LAS-to-ORD delay category, accounting for 41.7% of 95,919 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.6%
Late aircraft41.7%
National airspace30.2%
Weather1.5%
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.