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Airport · ALS · Alamosa, Colorado

Alamosa, CO

According to PlainFlights' airport traffic ranking (BTS On-Time Performance total flights), Alamosa, CO (ALS) ranks #361 of 382 tracked US airports by total flights (most flights = #1). Alamosa, CO posts top-5% on-time performance among the 382 tracked U.S. airports, as a smaller regional airport.

Data updated 2026-06-13

89%
On-time
Top 5%
on-time, US airports
166 min
Delay when late
2.02%
Cancelled
#361 of 382
Corpus placement
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ALS on-time rate vs. the national average

Ahead of the U.S. average across all 382 tracked airports.

0%100%U.S. average79%89%

Delay Cause Breakdown

Top delay cause: Carrier. Total delay minutes: 18,636.

Late Aircraft 25.3% (4,724 min)
Carrier 65.1% (12,132 min)
NAS (National Aviation System) 1.9% (351 min)
Weather 7.7% (1,429 min)
Security 0.0% (0 min)

ALS - seasonal on-time pattern

Best: September (99%) · worst: July (91.5%)

90%92%94%96%98%100% JanFebMarAprMayJunJulAugSepOctNovDec 93%

ALS - on-time rate by year

2020–2022, year-over-year trend.

92%93%94%95%96%97% 202020212022 92.8% 96% ▲ +3.4%

ALS - taxi-out and taxi-in (monthly)

Average taxi-out 16 min · taxi-in 4.6 min over the last 20 reported months (U.S. airport mean taxi-out ≈ 16.4 min).

5 min10 min15 min20 min25 min Nov 20Jun 22 18.9 min 15.3 min ▼ -19.0%

ALS's average taxi-out (16 min) sits near the recent U.S. airport mean (~16.4 min). Month-to-month, it swings from 9.9 min (September 2021) to 23.6 min (December 2020).

Cancellation & Diversion Analysis

Flight disruption statistics for Alamosa, CO.

Cancellation Rate

2.02%

40 of 1,982 flights

Diversion Rate

0.05%

1 of 1,982 flights

Delay Rate

11.0%

219 of 1,982 flights

Top Routes from ALS

Busiest routes to and from Alamosa, CO.

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Route Flights On-Time Distance
ALS (Alamosa) → DEN (Denver) 979 90.6% 179 mi
DEN (Denver) → ALS (Alamosa) 979 87.8% 179 mi

Nationwide peers by on-time rate & flight volume

Two PlainFlights-derived comparison paths for Alamosa, CO, both outside Colorado so the neighborhoods are not same-state geography. Axes stay disjoint: volume peers exclude the on-time peer set. Same-state compare stays below.

Similar on-time rate

Nearest out-of-state BTS on-time rate (this airport: 89%).

Hibbing, MN

Hibbing, MN

89% on-time 7,678 flights

Brainerd, MN

Brainerd, MN

88.9% on-time 7,762 flights

Deadhorse, AK

Deadhorse, AK

89.1% on-time 5,986 flights

Del Rio, TX

Del Rio, TX

88.9% on-time 3,957 flights

Similar flight volume

Nearest out-of-state total flights (this airport: 1,982).

Lynchburg, VA

Lynchburg, VA

2,116 flights 86.5% on-time

Santa Maria, CA

Santa Maria, CA

2,193 flights 76.6% on-time

Hyannis, MA

Hyannis, MA

2,242 flights 79.1% on-time

St. Cloud, MN

St. Cloud, MN

1,690 flights 83.2% on-time

Other Airports in Colorado

Compare performance with other Colorado airports.

DEN 78.9%

Denver, CO

Denver · 3,293,040 flights
COS 80.4%

Colorado Springs, CO

Colorado Springs · 134,711 flights
ASE 73.5%

Aspen, CO

Aspen · 78,805 flights
GJT 85.1%

Grand Junction, CO

Grand Junction · 47,063 flights
DRO 83.4%

Durango, CO

Durango · 42,722 flights
EGE 78%

Eagle, CO

Eagle · 37,271 flights
MTJ 81.3%

Montrose/Delta, CO

Montrose/Delta · 32,233 flights
HDN 79.7%

Hayden, CO

Hayden · 27,069 flights

ALS delay-share reading

The standout signal at Alamosa, CO is the delay mix: Carrier owns 65.1% of 18,636 delay minutes across 1,982 BTS flights. The on-time headline is 89% (10 pts above the 79% national average), with 219 delayed and 40 cancelled (2.02%).

Delay minutes concentrate in Carrier (25.3% late-aircraft, 65.1% carrier, 1.9% NAS, 7.7% weather, 0.0% security). As a quieter airport, a single late inbound can swing the month more than at a mega-hub.

On the multi-year calendar, ALS is strongest in September (99% on-time) and weakest in July (91.5%), a 7.5-point swing. Volume peaks in December (~107 flights/month). The busiest connecting route is to DEN (Denver) at 90.6% on-time. Field definitions: on-time performance explained.

Statewide aggregates for Colorado: Colorado flight data.

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2022). Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.

Read our methodology - how this data is sourced, computed, and verified.

Using ALS's data

ALS's on-time book is stronger than most peers; the remaining risk sits in the delay mix, not a weak headline rate.

  • Check the busiest route from ALS before you book a connection. See top routes
  • Travel in September rather than July if your dates are flexible. Seasonal patterns
  • Gate-to-wheels taxi-out averages 16 min here; check the monthly series before a tight connection. Taxi times

On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.

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

Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. Airport figures are computed directly from BTS On-Time Performance data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.