Route · DEN → BOS · 2020–2025 BTS data
Denver to Boston
The DEN–BOS corridor (Denver, CO → Boston, MA) runs behind the national average, served by 18 carriers across roughly 1,754 miles.
Data updated 2026-06-13
- 73.9%
- On-time
- -5.1 pts
- vs US avg
- 72 min
- Delay when late
- 18,398
- Flights
Cancelled
0.8%
Best Month
Dec 2025 86%
Worst Month
Sep 2025 52%
Distance
1,754 mi
Carriers
18
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 303 | 43 | 2 | 0 | DL,WN,B6,UA |
| Nov 2025 | 292 | 58 | 0 | 1 | UA,B6,DL,WN |
| Oct 2025 | 343 | 138 | 0 | 1 | B6,DL,UA,WN |
| Sep 2025 | 333 | 161 | 2 | 0 | UA,WN,DL,B6 |
| Aug 2025 | 397 | 107 | 2 | 0 | WN,UA,B6,DL |
| Jul 2025 | 427 | 143 | 5 | 0 | B6,DL,UA,WN |
| Jun 2025 | 382 | 122 | 0 | 1 | B6,DL,UA,WN |
| May 2025 | 333 | 130 | 0 | 1 | B6,DL,UA,WN |
| Apr 2025 | 287 | 48 | 0 | 0 | UA,WN,B6,DL |
| Mar 2025 | 305 | 63 | 0 | 0 | B6,DL,UA,WN |
| Feb 2025 | 250 | 52 | 1 | 0 | B6,DL,UA,WN |
| Jan 2025 | 275 | 52 | 0 | 0 | B6,DL,UA,WN |
| Dec 2024 | 304 | 61 | 2 | 1 | B6,DL,UA,WN |
| Nov 2024 | 310 | 73 | 1 | 0 | UA,B6,WN,DL |
| Oct 2024 | 362 | 55 | 0 | 0 | UA,WN,DL,B6 |
| Sep 2024 | 354 | 93 | 1 | 0 | WN,UA,B6,DL |
| Aug 2024 | 411 | 153 | 3 | 3 | B6,DL,WN,UA |
| Jul 2024 | 388 | 109 | 14 | 0 | B6,DL,UA,WN |
| Jun 2024 | 368 | 118 | 1 | 3 | B6,DL,UA,WN |
| May 2024 | 314 | 111 | 3 | 2 | B6,DL,UA,WN |
| Apr 2024 | 257 | 65 | 0 | 0 | B6,DL,UA,WN |
| Mar 2024 | 259 | 81 | 3 | 0 | B6,DL,UA,WN |
| Feb 2024 | 223 | 75 | 3 | 1 | B6,DL,UA,WN |
| Jan 2024 | 247 | 86 | 17 | 1 | B6,DL,WN,UA |
Cancellation Rate
0.8%
60 of 7,724 flights
Diversion Rate
0.2%
15 of 7,724 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 →BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
Destination airport →Compare the two airports
See DEN and BOS 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–BOS.
Routes with a similar on-time rate
What the Data Says About DEN to BOS
On-time performance on the DEN to BOS pairing (Denver to Boston) trails a chunk of the network: 73.9% of 18,398 tracked flights arrived on schedule, with a 71.8-minute average delay on the ones that ran late. The route spans about 1,754 miles across 18 carriers. Cancellations over the trailing 24 months hit 0.8% (60 of 7,724 flights), with 0.2% diverted.
The monthly split is wide on this route: Dec 2025 posted the strongest performance at 86% on-time, while Sep 2025 came in at just 52% - a 34-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.