Route
DEN → DCA
Denver International Airport Ronald Reagan Washington National Airport
1,476 miles
Return route DCA → DEN →
How punctual is this route?
- On-time arrivals
- 80.6%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 74 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,347
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 49%
- Late-arriving aircraft 24%
- Airline (crew, maintenance, cleaning) 24%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 77.1% | 110 |
| October 2025 | 87.8% | 115 |
| November 2025 | 81.2% | 112 |
| December 2025 | 86.8% | 114 |
| January 2026 | 79.3% | 116 |
| February 2026 | 84.6% | 104 |
| March 2026 | 78.8% | 115 |
| April 2026 | 81.5% | 109 |
| May 2026 | 85.3% | 116 |
| June 2026 | 80.0% | 110 |
| July 2026 | 73.8% | 110 |
| August 2026 | 69.9% | 116 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Frontier Airlines | 983 | 77.5% | 0.8% | 76 min |
| United Airlines | 364 | 88.6% | 0.3% | 65 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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