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

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

Historically, 72.5% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 5,297 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
72.5%arrived on time
17.5%30+ min late
1.3%cancelled
5,297scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.5%all scheduled flights
120+ minutes late3.6%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+10.5 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning1,22988.3%6.0%0.7%
Late morning1,08078.6%13.6%0.4%
Afternoon1,47570.2%19.3%1.0%
Evening1,19959.2%27.4%1.8%
Night31450.3%29.9%6.7%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday80967.7%20.9%1.6%
Tuesday72179.6%12.5%0.8%
Wednesday68176.4%14.7%0.3%
Thursday77972.5%17.5%1.3%
Friday80770.9%17.8%1.5%
Saturday70676.1%15.9%1.3%
Sunday79465.7%22.3%2.3%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines2,32879.0%13.0%0.4%
American Airlines1,85264.9%22.6%2.2%
Southwest Airlines67071.3%19.0%0.7%
Spirit Airlines26182.8%10.3%1.1%
Frontier Airlines18654.8%28.0%5.9%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202547566.7%20.4%1.5%
August 202548577.1%14.0%2.1%
September 202548178.4%13.7%0.6%
October 202548475.6%15.9%0.0%
November 202538978.4%13.4%2.6%
December 202535868.7%21.5%1.1%
January 202636072.5%18.3%0.8%
February 202639282.4%9.2%0.3%
March 202648769.6%18.9%3.3%
April 202650863.2%23.8%1.6%
May 202648271.6%19.5%0.0%
June 202639666.7%20.7%2.0%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline28.8%
Late aircraft45.9%
National airspace19.3%
Weather5.8%
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.