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

Washington, DC (DCA) to Dayton, OH (DAY) flight delay odds

Historically, 61.5% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 965 flights.

HISTORICAL ROUTE SIGNALHigher disruption
61.5%arrived on time
25.8%30+ min late
4.2%cancelled
965scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late15.5%all scheduled flights
120+ minutes late6.7%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+21.7 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 morning30980.3%12.6%2.3%
Afternoon15851.3%39.9%1.3%
Evening21952.5%30.6%4.1%
Night27252.2%29.4%8.5%

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
Monday15066.0%20.7%7.3%
Tuesday14163.8%24.8%3.5%
Wednesday15257.9%30.9%2.6%
Thursday14861.5%25.0%2.7%
Friday14857.4%29.1%4.1%
Saturday9072.2%18.9%3.3%
Sunday13655.1%28.7%5.9%

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
PSA Airlines96561.5%25.8%4.2%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20258047.5%30.0%12.5%
August 20258169.1%12.3%4.9%
September 20258681.4%10.5%0.0%
October 20259165.9%22.0%0.0%
November 20258460.7%28.6%4.8%
December 20256350.8%41.3%1.6%
January 20267844.9%32.1%14.1%
February 20268048.8%36.2%3.8%
March 20268861.4%28.4%4.5%
April 20268169.1%24.7%0.0%
May 20268066.2%25.0%1.2%
June 20267367.1%23.3%4.1%

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.

Airline27.3%
Late aircraft53.0%
National airspace12.5%
Weather7.2%
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.