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

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

75.1% of 2,346 official scheduled LAS-to-MDW flights arrived on time; 12.9% arrived at least 30 minutes late and 0.9% 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
75.1%arrived on time
12.9%30+ min late
0.9%cancelled
2,346scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.2%all scheduled flights
120+ minutes late1.6%all scheduled flights
Diverted0.7%did not reach as scheduled
Average arrival+5.9 mincompleted flights

Which departure time was most reliable for LAS to MDW?

Among qualifying LAS-to-MDW departure window results, Early morning had the highest on-time rate: 89.1% of 682 flights. Evening was lowest at 50.7% across 296 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning68289.1%4.5%0.9%
Late morning39177.5%9.0%0.3%
Afternoon61263.9%19.9%1.3%
Evening29650.7%31.1%1.0%
Night36584.9%6.0%0.5%

Which weekday was most reliable for LAS to MDW?

Among qualifying LAS-to-MDW weekday results, Saturday had the highest on-time rate: 80.3% of 264 flights. Thursday was lowest at 68.7% across 348 flights.

DayFlightsOn time30+ minCancelled
Monday35574.4%14.4%0.6%
Tuesday34179.5%8.5%0.3%
Wednesday33379.9%10.5%0.3%
Thursday34868.7%17.0%0.3%
Friday34969.9%16.9%2.3%
Saturday26480.3%9.1%1.1%
Sunday35674.7%12.6%1.1%

Which airline was most reliable for LAS to MDW?

Only Southwest Airlines met the LAS-to-MDW airline threshold: 75.1% of 2,343 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines2,34375.1%12.8%0.9%
Allegiant Air250.0%50.0%0.0%
Frontier Airlines1100.0%0.0%0.0%

Which month was most reliable for LAS to MDW?

Among qualifying LAS-to-MDW month results, August 2025 had the highest on-time rate: 82.9% of 216 flights. June 2026 was lowest at 63.0% across 200 flights.

MonthFlightsOn time30+ minCancelled
July 202525570.2%19.2%1.6%
August 202521682.9%10.2%0.9%
September 202521282.5%12.3%0.5%
October 202520978.0%10.5%0.0%
November 202517977.1%10.6%3.4%
December 202518678.0%7.5%0.0%
January 202616173.9%7.5%0.0%
February 202614180.1%7.1%0.0%
March 202619467.5%18.0%1.5%
April 202619377.7%8.3%1.0%
May 202620072.0%14.5%0.5%
June 202620063.0%24.0%0.5%

What drove LAS to MDW delay minutes?

Late aircraft was the largest recorded LAS-to-MDW delay category, accounting for 44.6% of 26,759 BTS-attributed delay minutes during July 2025–June 2026.

Airline42.9%
Late aircraft44.6%
National airspace11.7%
Weather0.6%
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.