Route · BOS → DEN · 2020–2025 BTS data
Boston to Denver
The BOS–DEN corridor (Boston, MA → Denver, CO) runs ahead of the national average, served by 18 carriers across roughly 1,754 miles.
Data updated 2026-06-13
- 81.7%
- On-time
- +2.7 pts
- vs US avg
- 65 min
- Delay when late
- 18,507
- Flights
Cancelled
0.9%
Best Month
Feb 2024 91%
Worst Month
Feb 2025 63%
Distance
1,754 mi
Carriers
18
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 301 | 79 | 2 | 1 | DL,WN,B6,UA |
| Nov 2025 | 293 | 36 | 1 | 0 | UA,B6,DL,WN |
| Oct 2025 | 342 | 78 | 1 | 0 | B6,DL,UA,WN |
| Sep 2025 | 333 | 91 | 1 | 1 | UA,WN,DL,B6 |
| Aug 2025 | 397 | 83 | 2 | 4 | WN,UA,B6,DL |
| Jul 2025 | 427 | 132 | 5 | 3 | B6,DL,UA,WN |
| Jun 2025 | 384 | 114 | 1 | 1 | B6,DL,UA,WN |
| May 2025 | 350 | 82 | 0 | 1 | B6,DL,UA,WN |
| Apr 2025 | 303 | 94 | 0 | 0 | UA,WN,B6,DL |
| Mar 2025 | 321 | 33 | 0 | 1 | B6,DL,UA,WN |
| Feb 2025 | 251 | 94 | 1 | 0 | B6,DL,UA,WN |
| Jan 2025 | 275 | 45 | 1 | 0 | B6,DL,UA,WN |
| Dec 2024 | 303 | 45 | 2 | 0 | B6,DL,UA,WN |
| Nov 2024 | 311 | 49 | 1 | 0 | UA,B6,WN,DL |
| Oct 2024 | 362 | 41 | 0 | 0 | UA,WN,DL,B6 |
| Sep 2024 | 354 | 42 | 1 | 1 | WN,UA,B6,DL |
| Aug 2024 | 411 | 114 | 2 | 3 | B6,DL,WN,UA |
| Jul 2024 | 388 | 88 | 13 | 1 | B6,DL,UA,WN |
| Jun 2024 | 367 | 88 | 1 | 3 | B6,DL,UA,WN |
| May 2024 | 313 | 70 | 3 | 1 | B6,DL,UA,WN |
| Apr 2024 | 254 | 48 | 0 | 1 | B6,DL,UA,WN |
| Mar 2024 | 259 | 35 | 3 | 0 | B6,DL,UA,WN |
| Feb 2024 | 223 | 21 | 3 | 1 | B6,DL,UA,WN |
| Jan 2024 | 247 | 43 | 27 | 0 | B6,DL,WN,UA |
Cancellation Rate
0.9%
71 of 7,769 flights
Diversion Rate
0.3%
23 of 7,769 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
Origin airport →DEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
Destination airport →Compare the two airports
See BOS and DEN side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to BOS–DEN.
Routes with a similar on-time rate
What the Data Says About BOS to DEN
18,507 tracked flights put the BOS to DEN pairing (Boston to Denver) at a 81.7% on-time rate, squarely in line with the wider network. Delays that do occur run 64.8 minutes on average. Across the 1,754-mile route and its 18 carriers, the trailing 24 months show 0.9% cancelled and 0.3% diverted (7,769 flights sampled).
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 91% on-time, while Feb 2025 came in at just 63% - a 28-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.