Route · BUF → DEN · 2020–2025 BTS data
Buffalo to Denver
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BUF to DEN (Buffalo to Denver) ranks #3682 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 81.7%
- On-time
- +2.7 pts
- vs US avg
- 59 min
- Delay when late
- 2,224
- Flights
- #3682 of 4927
- Corpus placement
Cancelled
1.8%
Best Month
Jun 2025 91%
Worst Month
Aug 2024 72%
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 | 9 | 0 | 0 | UA,WN,F9 |
| Sep 2025 | 77 | 19 | 0 | 0 | UA,WN,F9 |
| Aug 2025 | 81 | 15 | 0 | 0 | WN,F9,UA |
| Jul 2025 | 83 | 15 | 0 | 0 | UA,WN,F9 |
| Jun 2025 | 79 | 7 | 1 | 1 | UA,WN,F9 |
| May 2025 | 44 | 12 | 0 | 0 | UA,WN,F9 |
| Apr 2025 | 30 | 9 | 0 | 0 | WN |
| Oct 2024 | 39 | 4 | 0 | 0 | WN,F9 |
| Sep 2024 | 44 | 3 | 0 | 0 | WN,F9 |
| Aug 2024 | 54 | 15 | 0 | 0 | F9,WN |
| Jul 2024 | 48 | 9 | 1 | 0 | F9,WN |
| Jun 2024 | 46 | 14 | 0 | 0 | F9,WN |
| May 2024 | 49 | 19 | 1 | 0 | F9,WN |
| Apr 2024 | 42 | 15 | 0 | 0 | F9,WN |
| Mar 2024 | 31 | 6 | 0 | 0 | WN |
| Jan 2024 | 31 | 5 | 6 | 0 | WN |
| Dec 2023 | 31 | 1 | 0 | 0 | WN |
| Nov 2023 | 30 | 3 | 0 | 0 | WN |
| Oct 2023 | 31 | 5 | 0 | 0 | WN |
| Sep 2023 | 32 | 1 | 0 | 0 | F9,WN |
| Aug 2023 | 47 | 12 | 1 | 1 | F9,WN |
| Jul 2023 | 37 | 14 | 0 | 0 | F9,WN |
| Dec 2022 | 45 | 9 | 11 | 0 | WN,F9 |
BUF–DEN seasonal on-time pattern
Best: November (91.2%) · weakest: April (71.3%)
Strongest calendar month
November
91.2% on-time · ~39 flights/mo
Busiest calendar month
August
~56 flights/mo avg
Weakest calendar month
April
71.3% on-time · ~34 flights/mo
Cancellation Rate
1.8%
21 of 1,153 flights
Diversion Rate
0.2%
2 of 1,153 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BUF - Buffalo
Full on-time, delay-cause, and seasonal performance for Buffalo, NY.
BUF on-time profileDEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
DEN on-time profileCompare the two airports
See BUF and DEN side by side on delays, cancellations, and reliability.
Compare BUF vs DENOrigin-hub reliability standing
Mid-pack among BUF departures
From BUF, this corridor sits with 12 other 75–85% on-time routes out of 19 tracked departures, not the hub's reliability leaders (6 at ≥85%) and not the softest ( 1 below 75%). Destination: Denver · fleet on-time rank #2459 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to BUF–DEN.
Routes with a similar on-time rate
What the Data Says About BUF to DEN
2,224 tracked flights put the BUF to DEN pairing (Buffalo to Denver) at a 81.7% on-time rate, squarely in line with the wider network. Delays that do occur run 58.5 minutes on average. Across the 1,359-mile route and its 6 carriers, the trailing 24 months show 1.8% cancelled and 0.2% diverted (1,153 flights sampled).
The monthly split is wide on this route: Jun 2025 posted the strongest performance at 91% on-time, while Aug 2024 came in at just 72% - a 19-point swing worth factoring into travel timing.
On the multi-year calendar, BUF–DEN peaks in November at 91.2% on-time while August carries the heaviest traffic (~56 flights per month) ; the softest month is April at 71.3%, a 19.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does BUF to DEN rank among US routes by traffic? ▼
How often are flights delayed from BUF to DEN? ▼
What is the cancellation rate for BUF to DEN? ▼
How far is the flight from BUF to DEN? ▼
When is the best time to fly from BUF to DEN? ▼
Airports on this route
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.
Using BUF–DEN data
BUF–DEN is mid-pack at 81.7% on-time; month and carrier mix move more than the corridor headline.
- Compare BUF and DEN airport profiles: delay causes and top routes differ even on the same corridor. BUF airport
- If your dates flex, November (91.2% on-time) beats April (71.3%) on this corridor. Seasonal chart
- 4 other routes post a similar 81.7% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.