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

Washington, DC (IAD) to Detroit, MI (DTW) flight delay odds

Historically, 75.4% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,096 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
75.4%arrived on time
17.2%30+ min late
1.6%cancelled
1,096scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.6%all scheduled flights
120+ minutes late5.6%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+16.5 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 morning29183.2%11.7%1.4%
Late morning15989.3%8.2%0.0%
Afternoon11570.4%20.9%1.7%
Evening45367.5%23.2%1.8%
Night7870.5%15.4%3.8%

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
Monday15370.6%19.0%2.0%
Tuesday14773.5%23.1%0.7%
Wednesday15373.9%19.0%0.7%
Thursday16083.1%11.2%1.9%
Friday16574.5%17.0%1.2%
Saturday15979.2%15.7%0.0%
Sunday15972.3%15.7%4.4%

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
SkyWest Airlines75474.4%18.7%1.3%
Republic Airways20976.1%13.4%2.4%
Delta Air Lines9479.8%14.9%2.1%
United Airlines3979.5%12.8%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20258660.5%29.1%4.7%
August 20258276.8%17.1%0.0%
September 20257891.0%6.4%0.0%
October 20258993.3%3.4%0.0%
November 20253669.4%19.4%0.0%
December 20256155.7%34.4%0.0%
January 20268458.3%27.4%4.8%
February 20267865.4%26.9%1.3%
March 202612864.1%21.1%3.1%
April 202611085.5%10.0%0.0%
May 202614486.1%10.4%1.4%
June 202612081.7%13.3%1.7%

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.

Airline71.0%
Late aircraft5.8%
National airspace12.0%
Weather9.7%
Security1.6%
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.