Route Reliability
Washington → Denver
DCA–DEN · 1,476 miles · Ronald Reagan Washington National Airport to Denver International Airport
- 79%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 0.7%
- Cancelled
- 1,348
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Frontier Airlines79%983 flights
- 2.United Airlines79%365 flights
What the data says
The 12–3 PM departure wins.
DCA–DEN flights departing between 12–3 PM arrived on time 87% of the time, versus 64% between 6–9 PM.
Thursdays have been rough.
DCA–DEN flights arrived on time 90% of the time on Saturdays and just 73% on Thursdays. That gap is worth planning around.
Not much between Frontier Airlines and United Airlines.
On this route they all land within 79% to 79% on time. Pick on schedule and price.
Ticking up lately.
DCA–DEN flights arrived on time 82% of the time over the last three months in the data, compared with 78% in the three months before that.
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
- Mon80%(206 flights)
- Tue79%(157 flights)
- Wed75%(156 flights)
- Thu73%(201 flights)
- Fri75%(203 flights)
- Sat90%(204 flights)
- Sun80%(204 flights)
- 6–9 AM86%(357 flights)
- 12–3 PM87%(315 flights)
- 3–6 PM78%(357 flights)
- 6–9 PM64%(302 flights)
Jun 74% → May 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 74% | 108 |
| July 2025 | 70% | 109 |
| August 2025 | 80% | 114 |
| September 2025 | 77% | 110 |
| October 2025 | 88% | 114 |
| November 2025 | 80% | 112 |
| December 2025 | 74% | 113 |
| January 2026 | 82% | 111 |
| February 2026 | 79% | 104 |
| March 2026 | 80% | 113 |
| April 2026 | 82% | 108 |
| May 2026 | 83% | 115 |
Same trip, other airports
Keep nerding
Based on 1,348 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.