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

Los Angeles, CA (LAX) to Washington, DC (IAD) flight delay odds

85.7% of 2,454 official scheduled LAX-to-IAD flights arrived on time; 8.1% arrived at least 30 minutes late and 0.7% 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
85.7%arrived on time
8.1%30+ min late
0.7%cancelled
2,454scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.1%all scheduled flights
120+ minutes late1.5%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival-4.1 mincompleted flights

Which departure time was most reliable for LAX to IAD?

Among qualifying LAX-to-IAD departure window results, Late morning had the highest on-time rate: 87.8% of 384 flights. Evening was lowest at 70.6% across 51 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning49380.7%11.2%1.4%
Late morning38487.8%6.5%0.3%
Afternoon65987.4%7.3%0.5%
Evening5170.6%25.5%0.0%
Night86787.2%6.7%0.7%

Which weekday was most reliable for LAX to IAD?

Among qualifying LAX-to-IAD weekday results, Tuesday had the highest on-time rate: 89.2% of 342 flights. Wednesday was lowest at 83.6% across 335 flights.

DayFlightsOn time30+ minCancelled
Monday36785.8%7.1%0.3%
Tuesday34289.2%5.8%0.3%
Wednesday33583.6%10.4%0.3%
Thursday36688.0%6.3%0.5%
Friday35583.9%9.0%1.4%
Saturday32383.9%10.2%0.3%
Sunday36685.2%8.2%1.6%

Which airline was most reliable for LAX to IAD?

Among qualifying LAX-to-IAD airline results, United Airlines had the highest on-time rate: 86.2% of 2,319 flights. Alaska Airlines was lowest at 76.0% across 50 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines2,31986.2%7.8%0.7%
American Airlines8577.6%12.9%0.0%
Alaska Airlines5076.0%14.0%0.0%

Which month was most reliable for LAX to IAD?

Among qualifying LAX-to-IAD month results, October 2025 had the highest on-time rate: 95.0% of 202 flights. July 2025 was lowest at 68.8% across 221 flights.

MonthFlightsOn time30+ minCancelled
July 202522168.8%20.8%1.4%
August 202519885.9%8.1%0.5%
September 202517490.8%4.0%0.6%
October 202520295.0%2.0%1.0%
November 202519883.8%8.6%0.0%
December 202521585.6%5.6%0.5%
January 202617478.7%12.1%4.0%
February 202615888.0%7.0%0.0%
March 202618475.0%16.8%0.0%
April 202622594.2%3.1%0.0%
May 202625290.5%4.4%0.0%
June 202625389.7%6.3%0.8%

What drove LAX to IAD delay minutes?

Late aircraft was the largest recorded LAX-to-IAD delay category, accounting for 40.3% of 18,689 BTS-attributed delay minutes during July 2025–June 2026.

Airline39.4%
Late aircraft40.3%
National airspace20.2%
Weather0.0%
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.