Route · DEN → ALS · 2020–2025 BTS data
Denver to Alamosa
The DEN–ALS corridor (Denver, CO → Alamosa, CO) runs ahead of the national average, served by 1 carrier across roughly 179 miles.
Data updated 2026-06-13
- 87.8%
- On-time
- +8.8 pts
- vs US avg
- 135 min
- Delay when late
- 979
- Flights
Cancelled
3.8%
Best Month
Nov 2021 98%
Worst Month
Jul 2021 72%
Distance
179 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| May 2022 | 52 | 7 | 2 | 0 | OO |
| Apr 2022 | 50 | 3 | 1 | 0 | OO |
| Mar 2022 | 46 | 12 | 1 | 0 | OO |
| Feb 2022 | 48 | 8 | 5 | 0 | OO |
| Jan 2022 | 52 | 4 | 14 | 0 | OO |
| Dec 2021 | 54 | 8 | 2 | 0 | OO |
| Nov 2021 | 51 | 1 | 0 | 0 | OO |
| Oct 2021 | 53 | 6 | 1 | 0 | OO |
| Sep 2021 | 52 | 3 | 0 | 0 | OO |
| Aug 2021 | 53 | 7 | 2 | 0 | OO |
| Jul 2021 | 53 | 15 | 0 | 0 | OO |
| Jun 2021 | 51 | 14 | 0 | 0 | OO |
| May 2021 | 53 | 6 | 0 | 0 | OO |
| Apr 2021 | 52 | 4 | 0 | 0 | OO |
| Mar 2021 | 53 | 6 | 5 | 1 | OO |
| Feb 2021 | 48 | 4 | 0 | 0 | OO |
| Jan 2021 | 53 | 4 | 1 | 0 | OO |
| Dec 2020 | 53 | 3 | 1 | 1 | OO |
| Nov 2020 | 52 | 4 | 2 | 0 | OO |
Cancellation Rate
3.8%
37 of 979 flights
Diversion Rate
0.2%
2 of 979 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 →ALS - Alamosa
Full on-time, delay-cause, and seasonal performance for Alamosa, CO.
Destination airport →Compare the two airports
See DEN and ALS 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–ALS.
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What the Data Says About DEN to ALS
Denver to Alamosa (DEN to ALS) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.8% on-time rate across 979 flights, with delays that do happen averaging 135.1 minutes. The corridor runs roughly 179 miles and is served by 1 carrier. Over the most recent 24 months, 37 of 979 flights were cancelled (3.8%) and 2 diverted (0.2%).
The monthly split is wide on this route: Nov 2021 posted the strongest performance at 98% on-time, while Jul 2021 came in at just 72% - a 26-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.