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Route Reliability

Denver → Washington

DEN–DCA · 1,476 miles · Denver International Airport to Ronald Reagan Washington National Airport

83
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
4 min
Average arrival delay
0.7%
Cancelled
1,350
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines89%365 flights
  2. 2.Frontier Airlines77%985 flights

What the data says

Morning flights do better here.

DEN–DCA flights departing between 6–9 AM arrived on time 96% of the time, versus 64% between 3–6 PM.

Thursday is the weak spot.

DEN–DCA flights arrived on time 90% of the time on Saturdays. On Thursdays: 76%.

United Airlines runs this route best.

United Airlines arrived on time 89% of the time on this route; Frontier Airlines managed 77%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon78%(206 flights)
  • Tue85%(156 flights)
  • Wed79%(155 flights)
  • Thu76%(201 flights)
  • Fri77%(206 flights)
  • Sat90%(201 flights)
  • Sun81%(207 flights)
On-time by departure window
  • 6–9 AM96%(310 flights)
  • 9 AM–12 PM83%(665 flights)
  • 12–3 PM—(3 flights)
  • 3–6 PM64%(354 flights)
On-time trend by month
85%
May

Jun 69% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%107
July 202574%108
August 202577%115
September 202578%109
October 202588%115
November 202581%112
December 202587%114
January 202680%111
February 202685%104
March 202680%113
April 202682%108
May 202685%116

Same trip, other airports

Keep nerding

Based on 1,350 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.