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

Atlanta, GA (ATL) to Washington, DC (DCA) flight delay odds

Historically, 67.5% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 6,812 flights.

HISTORICAL ROUTE SIGNALVariable
67.5%arrived on time
18.5%30+ min late
3.3%cancelled
6,812scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.6%all scheduled flights
120+ minutes late4.0%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+15.6 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 morning1,19783.5%6.8%4.3%
Late morning1,39678.9%11.4%2.8%
Afternoon1,89262.3%22.0%2.0%
Evening1,84654.7%27.2%4.4%
Night48163.8%21.0%3.5%

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
Monday1,03467.4%16.6%3.9%
Tuesday99972.5%16.3%2.4%
Wednesday1,03069.4%18.8%1.9%
Thursday1,01864.1%22.5%1.8%
Friday1,01663.7%21.1%3.7%
Saturday75275.3%12.6%3.5%
Sunday96361.6%20.0%6.2%

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
Delta Air Lines3,83865.3%19.8%2.6%
Southwest Airlines1,13971.8%17.8%1.8%
PSA Airlines1,05368.9%17.0%7.7%
Republic Airways46270.8%13.2%3.2%
Envoy Air25969.1%16.2%3.9%
American Airlines6167.2%26.2%1.6%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202558251.4%31.6%7.6%
August 202558372.2%16.5%1.5%
September 202559279.7%10.3%0.3%
October 202558277.7%11.2%0.2%
November 202554466.9%20.6%3.3%
December 202554362.8%20.1%3.7%
January 202657365.4%16.6%8.4%
February 202652865.2%18.2%3.0%
March 202658557.9%22.4%5.1%
April 202656471.8%14.9%0.4%
May 202657469.5%19.9%2.1%
June 202656268.3%20.1%4.3%

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.

Airline29.3%
Late aircraft29.5%
National airspace35.9%
Weather5.2%
Security0.1%
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.