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Route · DEN → ALS · 2020–2025 BTS data

Denver to Alamosa

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), DEN to ALS (Denver to Alamosa) ranks #4524 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

87.8%
On-time
+8.8 pts
vs US avg
135 min
Delay when late
979
Flights
#4524 of 4927
Corpus placement

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

DEN–ALS seasonal on-time pattern

Best: November (95.1%) · weakest: July (71.7%)

70%80%90%100% JanFebMarAprMayJunJulAugSepOctNovDec 89.7%

Strongest calendar month

November

95.1% on-time · ~52 flights/mo

Busiest calendar month

December

~54 flights/mo avg

Weakest calendar month

July

71.7% on-time · ~53 flights/mo

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.

DEN on-time profile

ALS - Alamosa

Full on-time, delay-cause, and seasonal performance for Alamosa, CO.

ALS on-time profile

Compare the two airports

See DEN and ALS side by side on delays, cancellations, and reliability.

Compare DEN vs ALS

Origin-hub reliability standing

Among DEN's stronger departures

DEN → ALS posts a 87.8% on-time rate, landing in the ≥85% band with 8 of 168 BTS-tracked routes leaving Denver. The same hub also shows 133 mid-band and 27 challenged departures · fleet-wide on-time rank #449 of 4927 (highest on-time = #1).

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.

On the multi-year calendar, DEN–ALS peaks in November at 95.1% on-time while December carries the heaviest traffic (~54 flights per month) ; the softest month is July at 71.7%, a 23.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does DEN to ALS rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, DEN to ALS ranks #4524 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from DEN to ALS? ▼
Flights from Denver to Alamosa have a 87.8% on-time rate based on 979 flights. The average delay is 135.1 minutes. The best recent month was Nov 2021 with 98% on-time.
What is the cancellation rate for DEN to ALS? ▼
Over the last 24 months, 3.8% of flights on this route were cancelled (37 of 979 flights) and 0.2% were diverted.
How far is the flight from DEN to ALS? ▼
The flight distance from Denver (DEN) to Alamosa (ALS) is approximately 179 miles. This route is served by 1 carrier.
When is the best time to fly from DEN to ALS? ▼
The best recent month for on-time performance was Nov 2021 (98% on-time). The worst was Jul 2021 (72% on-time). Consider booking during months with historically better performance.

Airports on this route

DEN Airport

Denver
ALS Airport

Alamosa
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 DEN–ALS data

DEN–ALS runs 8.8 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare DEN and ALS airport profiles: delay causes and top routes differ even on the same corridor. DEN airport
  • If your dates flex, November (95.1% on-time) beats July (71.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 87.8% 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.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

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.