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

Denver, CO (DEN) to Washington, DC (DCA) flight delay odds

80.2% of 1,351 official scheduled DEN-to-DCA flights arrived on time; 13.5% arrived at least 30 minutes late and 0.7% 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 SIGNALLower disruption
80.2%arrived on time
13.5%30+ min late
0.7%cancelled
1,351scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.4%all scheduled flights
120+ minutes late2.5%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+2.4 mincompleted flights

Which departure time was most reliable for DEN to DCA?

Among qualifying DEN-to-DCA departure window results, Early morning had the highest on-time rate: 93.9% of 314 flights. Afternoon was lowest at 64.9% across 359 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning31493.9%3.5%0.6%
Late morning67882.0%10.3%0.7%
Afternoon35964.9%28.4%0.6%

Which weekday was most reliable for DEN to DCA?

Among qualifying DEN-to-DCA weekday results, Saturday had the highest on-time rate: 88.3% of 205 flights. Thursday was lowest at 75.6% across 205 flights.

DayFlightsOn time30+ minCancelled
Monday20778.3%17.4%0.5%
Tuesday16084.4%12.5%0.0%
Wednesday15879.1%13.9%0.0%
Thursday20575.6%16.6%1.0%
Friday20877.4%14.9%0.5%
Saturday20588.3%6.8%1.0%
Sunday20879.3%12.5%1.4%

Which airline was most reliable for DEN to DCA?

Among qualifying DEN-to-DCA airline results, United Airlines had the highest on-time rate: 87.9% of 365 flights. Frontier Airlines was lowest at 77.4% across 986 flights.

AirlineFlightsOn time30+ minCancelled
Frontier Airlines98677.4%15.6%0.8%
United Airlines36587.9%7.9%0.3%

Which month was most reliable for DEN to DCA?

Among qualifying DEN-to-DCA month results, October 2025 had the highest on-time rate: 87.8% of 115 flights. July 2025 was lowest at 70.2% across 114 flights.

MonthFlightsOn time30+ minCancelled
July 202511470.2%18.4%0.9%
August 202511676.7%14.7%0.0%
September 202511076.4%15.5%0.0%
October 202511587.8%7.8%0.0%
November 202511281.2%16.1%0.0%
December 202511486.8%6.1%0.0%
January 202611675.9%15.5%4.3%
February 202610484.6%11.5%0.0%
March 202611577.4%17.4%1.7%
April 202610980.7%12.8%0.9%
May 202611685.3%12.9%0.0%
June 202611080.0%13.6%0.0%

What drove DEN to DCA delay minutes?

National airspace was the largest recorded DEN-to-DCA delay category, accounting for 46.0% of 18,367 BTS-attributed delay minutes during July 2025–June 2026.

Airline24.9%
Late aircraft26.5%
National airspace46.0%
Weather2.6%
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.