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

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

77.6% of 1,349 official scheduled DCA-to-DEN flights arrived on time; 14.2% 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 SIGNALGenerally reliable
77.6%arrived on time
14.2%30+ min late
0.7%cancelled
1,349scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.1%all scheduled flights
120+ minutes late3.9%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+8.9 mincompleted flights

Which departure time was most reliable for DCA to DEN?

Among qualifying DCA-to-DEN departure window results, Early morning had the highest on-time rate: 84.2% of 360 flights. Evening was lowest at 64.3% across 305 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning36084.2%9.4%0.6%
Afternoon68480.1%12.1%0.6%
Evening30564.3%24.6%1.3%

Which weekday was most reliable for DCA to DEN?

Among qualifying DCA-to-DEN weekday results, Saturday had the highest on-time rate: 87.8% of 205 flights. Thursday was lowest at 71.6% across 204 flights.

DayFlightsOn time30+ minCancelled
Monday20778.7%15.0%0.5%
Tuesday16078.1%14.4%0.0%
Wednesday15773.9%16.6%0.0%
Thursday20471.6%17.2%1.0%
Friday20974.2%15.3%1.0%
Saturday20587.8%7.3%0.5%
Sunday20778.3%14.5%1.9%

Which airline was most reliable for DCA to DEN?

Among qualifying DCA-to-DEN airline results, Frontier Airlines had the highest on-time rate: 77.6% of 984 flights. United Airlines was lowest at 77.5% across 365 flights.

AirlineFlightsOn time30+ minCancelled
Frontier Airlines98477.6%14.5%0.9%
United Airlines36577.5%13.4%0.3%

Which month was most reliable for DCA to DEN?

Among qualifying DCA-to-DEN month results, October 2025 had the highest on-time rate: 87.0% of 115 flights. July 2025 was lowest at 67.3% across 113 flights.

MonthFlightsOn time30+ minCancelled
July 202511367.3%24.8%0.9%
August 202511577.4%15.7%0.0%
September 202511076.4%13.6%0.0%
October 202511587.0%7.8%0.9%
November 202511279.5%11.6%0.0%
December 202511472.8%17.5%0.0%
January 202611678.4%9.5%4.3%
February 202610478.8%14.4%0.0%
March 202611578.3%16.5%1.7%
April 202610981.7%11.0%0.9%
May 202611681.0%9.5%0.0%
June 202611072.7%19.1%0.0%

What drove DCA to DEN delay minutes?

National airspace was the largest recorded DCA-to-DEN delay category, accounting for 33.2% of 24,690 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.2%
Late aircraft28.7%
National airspace33.2%
Weather11.9%
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.