Route · DEN → BUF · 2020–2025 BTS data
Denver to Buffalo
The DEN–BUF corridor (Denver, CO → Buffalo, NY) runs behind the national average, served by 6 carriers across roughly 1,359 miles.
Data updated 2026-06-13
- 65%
- On-time
- -14 pts
- vs US avg
- 61 min
- Delay when late
- 2,129
- Flights
Cancelled
1.5%
Best Month
Oct 2025 84%
Worst Month
Jul 2025 47%
Distance
1,359 mi
Carriers
6
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Nov 2025 | 52 | 11 | 0 | 0 | UA,WN |
| Oct 2025 | 70 | 11 | 0 | 0 | UA,WN,F9 |
| Sep 2025 | 77 | 28 | 0 | 0 | UA,WN,F9 |
| Aug 2025 | 81 | 39 | 0 | 1 | WN,F9,UA |
| Jul 2025 | 83 | 44 | 1 | 0 | UA,WN,F9 |
| Jun 2025 | 79 | 39 | 0 | 0 | UA,WN,F9 |
| May 2025 | 44 | 29 | 0 | 0 | UA,WN,F9 |
| Apr 2025 | 30 | 19 | 0 | 0 | WN |
| Oct 2024 | 39 | 7 | 0 | 0 | WN,F9 |
| Sep 2024 | 44 | 6 | 0 | 0 | WN,F9 |
| Aug 2024 | 54 | 17 | 0 | 0 | F9,WN |
| Jul 2024 | 48 | 17 | 1 | 0 | F9,WN |
| Jun 2024 | 45 | 20 | 0 | 0 | F9,WN |
| May 2024 | 46 | 22 | 0 | 0 | F9,WN |
| Apr 2024 | 39 | 23 | 0 | 0 | F9,WN |
| Dec 2023 | 31 | 14 | 0 | 0 | WN |
| Nov 2023 | 30 | 10 | 0 | 0 | WN |
| Oct 2023 | 31 | 17 | 0 | 0 | WN |
| Sep 2023 | 32 | 20 | 0 | 0 | F9,WN |
| Aug 2023 | 47 | 22 | 0 | 0 | F9,WN |
| Jul 2023 | 37 | 13 | 0 | 1 | F9,WN |
| Dec 2022 | 45 | 6 | 12 | 1 | WN,F9 |
| Nov 2022 | 48 | 5 | 4 | 0 | F9,WN |
| Oct 2022 | 57 | 16 | 0 | 0 | WN,F9 |
Cancellation Rate
1.5%
18 of 1,189 flights
Diversion Rate
0.3%
3 of 1,189 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 →BUF - Buffalo
Full on-time, delay-cause, and seasonal performance for Buffalo, NY.
Destination airport →Compare the two airports
See DEN and BUF 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–BUF.
Routes with a similar on-time rate
What the Data Says About DEN to BUF
On-time performance on the DEN to BUF pairing (Denver to Buffalo) trails a chunk of the network: 65% of 2,129 tracked flights arrived on schedule, with a 60.9-minute average delay on the ones that ran late. The route spans about 1,359 miles across 6 carriers. Cancellations over the trailing 24 months hit 1.5% (18 of 1,189 flights), with 0.3% diverted.
The monthly split is wide on this route: Oct 2025 posted the strongest performance at 84% on-time, while Jul 2025 came in at just 47% - a 37-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.