BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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LAS→IAD

Las Vegas, NV (LAS) to Washington, DC (IAD) flight delay odds

86.2% of 1,109 official scheduled LAS-to-IAD flights arrived on time; 7.5% arrived at least 30 minutes late and 0.5% 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 SIGNALLower disruption
86.2%arrived on time
7.5%30+ min late
0.5%cancelled
1,109scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.4%all scheduled flights
120+ minutes late1.4%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival-6.2 mincompleted flights

Which departure time was most reliable for LAS to IAD?

Among qualifying LAS-to-IAD departure window results, Early morning had the highest on-time rate: 90.0% of 361 flights. Afternoon was lowest at 82.8% across 366 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning36190.0%4.2%0.3%
Afternoon36682.8%9.3%0.5%
Night38285.9%8.9%0.8%

Which weekday was most reliable for LAS to IAD?

Among qualifying LAS-to-IAD weekday results, Tuesday had the highest on-time rate: 91.8% of 146 flights. Sunday was lowest at 80.5% across 164 flights.

DayFlightsOn time30+ minCancelled
Monday15989.9%7.5%0.0%
Tuesday14691.8%2.7%0.0%
Wednesday15686.5%9.6%0.0%
Thursday16384.0%9.8%0.6%
Friday16784.4%6.6%0.6%
Saturday15487.0%7.8%0.6%
Sunday16480.5%7.9%1.8%

Which airline was most reliable for LAS to IAD?

Among qualifying LAS-to-IAD airline results, United Airlines had the highest on-time rate: 87.7% of 1,011 flights. Frontier Airlines was lowest at 70.4% across 98 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,01187.7%6.0%0.6%
Frontier Airlines9870.4%22.4%0.0%

Which month was most reliable for LAS to IAD?

Among qualifying LAS-to-IAD month results, October 2025 had the highest on-time rate: 94.6% of 93 flights. June 2026 was lowest at 72.2% across 90 flights.

MonthFlightsOn time30+ minCancelled
July 202512377.2%15.4%0.0%
August 202511986.6%10.1%0.0%
September 20259094.4%1.1%0.0%
October 20259394.6%2.2%0.0%
November 20258986.5%7.9%0.0%
December 20259290.2%5.4%0.0%
January 20269185.7%5.5%4.4%
February 20267493.2%2.7%0.0%
March 20268182.7%9.9%1.2%
April 20268190.1%4.9%1.2%
May 20268684.9%7.0%0.0%
June 20269072.2%13.3%0.0%

What drove LAS to IAD delay minutes?

Airline was the largest recorded LAS-to-IAD delay category, accounting for 45.2% of 7,412 BTS-attributed delay minutes during July 2025–June 2026.

Airline45.2%
Late aircraft31.5%
National airspace22.9%
Weather0.4%
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.