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

Atlanta, GA (ATL) to Washington, DC (IAD) flight delay odds

74.8% of 3,979 official scheduled ATL-to-IAD flights arrived on time; 16.4% arrived at least 30 minutes late and 2.0% 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
74.8%arrived on time
16.4%30+ min late
2.0%cancelled
3,979scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.6%all scheduled flights
120+ minutes late4.1%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+14.0 mincompleted flights

Which departure time was most reliable for ATL to IAD?

Among qualifying ATL-to-IAD departure window results, Early morning had the highest on-time rate: 85.1% of 503 flights. Night was lowest at 63.1% across 612 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning50385.1%8.0%2.0%
Late morning73681.7%9.6%1.8%
Afternoon1,40273.6%18.0%1.8%
Evening72673.0%17.6%1.7%
Night61263.1%26.6%3.1%

Which weekday was most reliable for ATL to IAD?

Among qualifying ATL-to-IAD weekday results, Thursday had the highest on-time rate: 79.5% of 594 flights. Friday was lowest at 68.6% across 608 flights.

DayFlightsOn time30+ minCancelled
Monday61073.4%16.4%2.1%
Tuesday55177.1%16.9%0.9%
Wednesday52678.5%15.2%0.2%
Thursday59479.5%13.3%0.7%
Friday60868.6%19.9%2.5%
Saturday47878.9%13.4%2.3%
Sunday61269.4%19.1%4.9%

Which airline was most reliable for ATL to IAD?

Among qualifying ATL-to-IAD airline results, United Airlines had the highest on-time rate: 80.9% of 1,099 flights. Frontier Airlines was lowest at 61.6% across 640 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines2,21975.5%14.7%2.7%
United Airlines1,09980.9%13.3%0.5%
Frontier Airlines64061.6%28.0%2.2%
Republic Airways2185.7%9.5%0.0%

Which month was most reliable for ATL to IAD?

Among qualifying ATL-to-IAD month results, April 2026 had the highest on-time rate: 83.6% of 354 flights. July 2025 was lowest at 58.4% across 353 flights.

MonthFlightsOn time30+ minCancelled
July 202535358.4%28.0%4.0%
August 202534473.5%19.8%0.6%
September 202531582.9%12.1%0.0%
October 202533479.9%12.6%0.3%
November 202532274.5%17.4%2.5%
December 202532167.3%21.5%2.2%
January 202628169.8%12.8%6.4%
February 202626282.8%10.3%1.9%
March 202630669.6%19.6%3.3%
April 202635483.6%9.3%1.1%
May 202640679.1%15.3%1.2%
June 202638176.4%16.8%1.3%

What drove ATL to IAD delay minutes?

Airline was the largest recorded ATL-to-IAD delay category, accounting for 41.0% of 74,150 BTS-attributed delay minutes during July 2025–June 2026.

Airline41.0%
Late aircraft34.0%
National airspace18.6%
Weather6.5%
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.