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

Newark, NJ (EWR) to Washington, DC (IAD) flight delay odds

72.1% of 1,502 official scheduled EWR-to-IAD flights arrived on time; 17.0% arrived at least 30 minutes late and 2.3% 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
72.1%arrived on time
17.0%30+ min late
2.3%cancelled
1,502scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.1%all scheduled flights
120+ minutes late4.5%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+12.5 mincompleted flights

Which departure time was most reliable for EWR to IAD?

Among qualifying EWR-to-IAD departure window results, Early morning had the highest on-time rate: 94.2% of 364 flights. Evening was lowest at 59.6% across 396 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning36494.2%1.6%2.2%
Late morning4388.4%9.3%0.0%
Afternoon36564.1%21.1%2.2%
Evening39659.6%25.8%2.8%
Night33469.5%20.1%2.4%

Which weekday was most reliable for EWR to IAD?

Among qualifying EWR-to-IAD weekday results, Saturday had the highest on-time rate: 80.0% of 215 flights. Sunday was lowest at 60.0% across 215 flights.

DayFlightsOn time30+ minCancelled
Monday21474.8%15.0%5.1%
Tuesday21977.2%13.7%1.8%
Wednesday21371.4%16.4%1.9%
Thursday21367.1%20.2%2.3%
Friday21374.2%16.0%0.5%
Saturday21580.0%14.0%0.5%
Sunday21560.0%24.2%4.2%

Which airline was most reliable for EWR to IAD?

Only United Airlines met the EWR-to-IAD airline threshold: 72.2% of 1,474 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines1,47472.2%17.1%2.2%
Republic Airways2867.9%14.3%7.1%

Which month was most reliable for EWR to IAD?

Among qualifying EWR-to-IAD month results, May 2026 had the highest on-time rate: 85.2% of 135 flights. July 2025 was lowest at 43.5% across 124 flights.

MonthFlightsOn time30+ minCancelled
July 202512443.5%36.3%8.9%
August 202512572.0%20.8%0.0%
September 202512275.4%18.9%0.0%
October 202512564.8%21.6%0.8%
November 202511768.4%20.5%2.6%
December 202512468.5%17.7%0.0%
January 202612475.8%12.1%4.8%
February 202611376.1%8.8%8.0%
March 202612370.7%18.7%0.8%
April 202612081.7%10.8%0.0%
May 202613585.2%6.7%1.5%
June 202615080.7%12.7%1.3%

What drove EWR to IAD delay minutes?

Late aircraft was the largest recorded EWR-to-IAD delay category, accounting for 44.5% of 28,578 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.7%
Late aircraft44.5%
National airspace25.1%
Weather3.6%
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.