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

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

83.1% of 1,293 official scheduled IAD-to-RDU flights arrived on time; 9.0% 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
83.1%arrived on time
9.0%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 late5.0%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+4.7 mincompleted flights

Which departure time was most reliable for IAD to RDU?

Among qualifying IAD-to-RDU departure window results, Early morning had the highest on-time rate: 90.7% of 322 flights. Evening was lowest at 77.0% across 317 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning32290.7%3.4%0.0%
Afternoon31785.2%7.6%1.6%
Evening31777.0%14.8%0.9%
Night33779.8%10.1%2.4%

Which weekday was most reliable for IAD to RDU?

Among qualifying IAD-to-RDU weekday results, Tuesday had the highest on-time rate: 88.9% of 190 flights. Thursday was lowest at 79.2% across 192 flights.

DayFlightsOn time30+ minCancelled
Monday18480.4%13.0%1.1%
Tuesday19088.9%5.8%0.5%
Wednesday19284.9%8.9%1.0%
Thursday19279.2%9.4%1.6%
Friday19383.9%11.4%0.0%
Saturday15085.3%6.0%2.7%
Sunday19279.7%7.8%2.1%

Which airline was most reliable for IAD to RDU?

Among qualifying IAD-to-RDU airline results, United Airlines had the highest on-time rate: 84.0% of 1,080 flights. Republic Airways was lowest at 78.9% across 213 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,08084.0%8.1%1.1%
Republic Airways21378.9%13.6%1.9%

Which month was most reliable for IAD to RDU?

Among qualifying IAD-to-RDU month results, May 2026 had the highest on-time rate: 90.2% of 112 flights. March 2026 was lowest at 75.7% across 115 flights.

MonthFlightsOn time30+ minCancelled
July 20257979.7%10.1%5.1%
August 202510786.0%8.4%0.9%
September 202514087.1%5.7%0.7%
October 202511984.9%7.6%0.0%
November 202511882.2%5.1%0.8%
December 202512076.7%12.5%0.0%
January 20269383.9%8.6%6.5%
February 20269184.6%7.7%1.1%
March 202611575.7%18.3%0.9%
April 202611387.6%7.1%0.0%
May 202611290.2%6.2%0.0%
June 20268676.7%11.6%1.2%

What drove IAD to RDU delay minutes?

Airline was the largest recorded IAD-to-RDU delay category, accounting for 39.2% of 14,436 BTS-attributed delay minutes during July 2025–June 2026.

Airline39.2%
Late aircraft33.4%
National airspace13.4%
Weather14.0%
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.