Route · DEN → IAD · 2020–2025 BTS data
Denver to Washington
The DEN–IAD corridor (Denver, CO → Washington, DC) runs ahead of the national average, served by 2 carriers across roughly 1,452 miles.
Data updated 2026-06-13
- 79.1%
- On-time
- +0.1 pts
- vs US avg
- 68 min
- Delay when late
- 17,394
- Flights
Cancelled
1.1%
Best Month
Nov 2025 87%
Worst Month
Jul 2025 65%
Distance
1,452 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 307 | 45 | 2 | 0 | WN,UA |
| Nov 2025 | 275 | 35 | 1 | 0 | UA,WN |
| Oct 2025 | 283 | 42 | 0 | 0 | UA,WN |
| Sep 2025 | 292 | 61 | 0 | 0 | UA,WN |
| Aug 2025 | 335 | 96 | 0 | 0 | WN,UA |
| Jul 2025 | 361 | 125 | 4 | 7 | UA,WN |
| Jun 2025 | 326 | 108 | 6 | 3 | UA,WN |
| May 2025 | 311 | 86 | 1 | 0 | UA,WN |
| Apr 2025 | 292 | 61 | 0 | 0 | UA,WN |
| Mar 2025 | 293 | 44 | 0 | 1 | UA,WN |
| Feb 2025 | 230 | 34 | 0 | 0 | UA,WN |
| Jan 2025 | 254 | 51 | 1 | 0 | UA,WN |
| Dec 2024 | 274 | 36 | 2 | 0 | UA,WN |
| Nov 2024 | 278 | 40 | 3 | 0 | UA,WN |
| Oct 2024 | 283 | 37 | 0 | 0 | UA,WN |
| Sep 2024 | 286 | 43 | 2 | 1 | WN,UA |
| Aug 2024 | 296 | 73 | 2 | 1 | WN,UA |
| Jul 2024 | 302 | 78 | 4 | 0 | UA,WN |
| Jun 2024 | 290 | 71 | 3 | 0 | UA,WN |
| May 2024 | 301 | 90 | 3 | 0 | UA,WN |
| Apr 2024 | 262 | 58 | 1 | 0 | UA,WN |
| Mar 2024 | 253 | 62 | 1 | 0 | UA,WN |
| Feb 2024 | 201 | 47 | 0 | 1 | UA,WN |
| Jan 2024 | 221 | 61 | 41 | 0 | WN,UA |
Cancellation Rate
1.1%
77 of 6,806 flights
Diversion Rate
0.2%
14 of 6,806 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
DEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
Origin airport →IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Destination airport →Compare the two airports
See DEN and IAD side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to DEN–IAD.
Routes with a similar on-time rate
What the Data Says About DEN to IAD
17,394 tracked flights put the DEN to IAD pairing (Denver to Washington) at a 79.1% on-time rate, squarely in line with the wider network. Delays that do occur run 68.0 minutes on average. Across the 1,452-mile route and its 2 carriers, the trailing 24 months show 1.1% cancelled and 0.2% diverted (6,806 flights sampled).
The monthly split is wide on this route: Nov 2025 posted the strongest performance at 87% on-time, while Jul 2025 came in at just 65% - a 22-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.