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

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

Historically, 73.5% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,501 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
73.5%arrived on time
16.5%30+ min late
2.3%cancelled
1,501scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.7%all scheduled flights
120+ minutes late5.7%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+14.6 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning72884.3%8.4%1.5%
Afternoon4276.2%4.8%0.0%
Evening36550.1%35.1%3.0%
Night36674.9%15.3%3.3%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday21474.3%16.4%4.2%
Tuesday21873.9%11.5%2.3%
Wednesday21377.0%15.5%1.9%
Thursday21470.1%18.7%2.3%
Friday21275.9%16.5%0.5%
Saturday21574.4%16.7%0.5%
Sunday21568.8%20.0%4.2%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,48073.4%16.6%2.2%
Republic Airways2181.0%9.5%4.8%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202512450.0%33.9%6.5%
August 202512459.7%26.6%0.8%
September 202512271.3%16.4%0.0%
October 202512472.6%17.7%0.0%
November 202511765.8%23.9%1.7%
December 202512575.2%17.6%0.0%
January 202612477.4%11.3%6.5%
February 202611279.5%9.8%7.1%
March 202612475.0%14.5%1.6%
April 202612089.2%8.3%0.0%
May 202613587.4%5.9%2.2%
June 202615077.3%12.7%1.3%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline17.5%
Late aircraft28.0%
National airspace41.8%
Weather12.7%
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.