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

Raleigh/Durham, NC (RDU) to Washington, DC (IAD) flight delay odds

85.5% of 1,293 official scheduled RDU-to-IAD flights arrived on time; 7.7% arrived at least 30 minutes late and 1.2% 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
85.5%arrived on time
7.7%30+ min late
1.2%cancelled
1,293scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.9%all scheduled flights
120+ minutes late2.7%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+1.5 mincompleted flights

Which departure time was most reliable for RDU to IAD?

Among qualifying RDU-to-IAD departure window results, Late morning had the highest on-time rate: 92.8% of 361 flights. Afternoon was lowest at 76.1% across 318 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning33488.9%3.3%1.8%
Late morning36192.8%3.9%0.6%
Afternoon31876.1%11.3%2.5%
Evening28082.5%13.6%0.0%

Which weekday was most reliable for RDU to IAD?

Among qualifying RDU-to-IAD weekday results, Saturday had the highest on-time rate: 92.7% of 150 flights. Sunday was lowest at 81.2% across 192 flights.

DayFlightsOn time30+ minCancelled
Monday18981.5%11.1%2.1%
Tuesday19087.4%5.8%1.1%
Wednesday18787.7%7.5%0.0%
Thursday19285.4%6.8%1.6%
Friday19383.9%9.3%1.0%
Saturday15092.7%4.0%0.0%
Sunday19281.2%8.3%2.6%

Which airline was most reliable for RDU to IAD?

Among qualifying RDU-to-IAD airline results, United Airlines had the highest on-time rate: 86.3% of 1,080 flights. Republic Airways was lowest at 81.2% across 213 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,08086.3%6.9%1.4%
Republic Airways21381.2%11.7%0.5%

Which month was most reliable for RDU to IAD?

Among qualifying RDU-to-IAD month results, April 2026 had the highest on-time rate: 92.9% of 113 flights. December 2025 was lowest at 78.3% across 120 flights.

MonthFlightsOn time30+ minCancelled
July 20257879.5%7.7%6.4%
August 202510884.3%8.3%0.0%
September 202513992.1%5.8%0.7%
October 202511988.2%4.2%0.0%
November 202511883.1%5.9%0.8%
December 202512078.3%10.8%0.0%
January 20269379.6%5.4%5.4%
February 20269290.2%3.3%2.2%
March 202611580.9%13.9%0.9%
April 202611392.9%4.4%0.0%
May 202611290.2%8.0%0.0%
June 20268682.6%15.1%1.2%

What drove RDU to IAD delay minutes?

Late aircraft was the largest recorded RDU-to-IAD delay category, accounting for 47.9% of 13,602 BTS-attributed delay minutes during July 2025–June 2026.

Airline19.5%
Late aircraft47.9%
National airspace21.1%
Weather11.5%
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.