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ICAO KASE

Aspen-Pitkin County Airport (Sardy Field) (ASE)

Aspen-Pitkin County Airport (Sardy Field) handled 74,548 passengers in July 2026, up 5.8% on a year earlier, according to the US BTS.

Official · July 2026 according to the US BTS Full count · domestic + international

Flights (arrivals + departures) over time

The most recent periods19 periods
PeriodFlights (arrivals + departures) 2025Flights (arrivals + departures) 2026Change vs last year
January1,9861,939▼ 2.4%
February1,7371,820▲ 4.8%
March2,0282,167▲ 6.9%
April965947▼ 1.9%
May109375▲ 244.0%
June1,1841,216▲ 2.7%
July1,3861,555▲ 12.2%
August1,305––
September1,118––
October925–in progress
November638––
December1,572––
Year to date (Jan–Jul)9,39510,019▲ 6.6%

Passengers over time

Full count · domestic + international
The most recent periods19 periods
PeriodPassengers 2025Passengers 2026Change vs last year
January89,82087,129▼ 3.0%
February86,54386,941▲ 0.5%
March99,44991,605▼ 7.9%
April39,97631,617▼ 20.9%
May3,24413,301▲ 310.0%
June54,48458,597▲ 7.5%
July70,46174,548▲ 5.8%
August66,833––
September54,062––
October43,884–in progress
November29,138––
December73,538––
Year to date (Jan–Jul)443,977443,738▼ 0.1%

Seats offered over time

Full count · domestic + international
The most recent periods19 periods
PeriodSeats offered 2025Seats offered 2026Change vs last year
January134,739131,693▼ 2.3%
February117,589124,069▲ 5.5%
March136,430147,707▲ 8.3%
April66,01765,269▼ 1.1%
May7,50025,865▲ 244.9%
June80,46783,344▲ 3.6%
July93,739104,580▲ 11.6%
August88,768––
September75,924––
October62,953–in progress
November43,925––
December107,581––
Year to date (Jan–Jul)636,481682,527▲ 7.2%

Domestic / International

July 2026
  • Domestic 99.8% 1,552
  • International 0.2% 3

Domestic / International — flights (arrivals + departures)

Full count · domestic + international

Domestic

The most recent periods9 periods
PeriodFlights (arrivals + departures) 2025Flights (arrivals + departures) 2026Change vs last year
January1,984––
February–1,819–
March2,0252,166▲ 7.0%
April964––
May–––
June–––
July–1,552–
August–––
September1,117––
October924–in progress
November–––
December1,570––

International

The most recent periods9 periods
PeriodFlights (arrivals + departures) 2025Flights (arrivals + departures) 2026Change vs last year
January2––
February–1–
March31▼ 66.7%
April1––
May–––
June–––
July–3–
August–––
September1––
October1–in progress
November–––
December2––

Domestic / International — passengers

Full count · domestic + international

Domestic

The most recent periods9 periods
PeriodPassengers 2025Passengers 2026Change vs last year
January89,818––
February–86,933–
March99,43191,603▼ 7.9%
April39,970––
May–––
June–––
July–74,536–
August–––
September54,060––
October43,876–in progress
November–––
December73,528––

International

The most recent periods9 periods
PeriodPassengers 2025Passengers 2026Change vs last year
January2––
February–8–
March182▼ 88.9%
April6––
May–––
June–––
July–12–
August–––
September2––
October8–in progress
November–––
December10––

Domestic / International — seats offered

Full count · domestic + international

Domestic

The most recent periods9 periods
PeriodSeats offered 2025Seats offered 2026Change vs last year
January134,711––
February–124,055–
March136,389147,701▲ 8.3%
April66,003––
May–––
June–––
July–104,540–
August–––
September75,910––
October62,939–in progress
November–––
December107,553––

International

The most recent periods9 periods
PeriodSeats offered 2025Seats offered 2026Change vs last year
January28––
February–14–
March416▼ 85.4%
April14––
May–––
June–––
July–40–
August–––
September14––
October14–in progress
November–––
December28––

Load factor (computed)

Full count · domestic + international

Passengers ÷ seats offered, both as reported by the US BTS for the same months. Computed by us; the two source series are shown on this page.

The most recent periods19 periods
PeriodLoad factor 2025Load factor 2026Change vs last year
January66.7%66.2%▼ 0.8%
February73.6%70.1%▼ 4.8%
March72.9%62.0%▼ 14.9%
April60.6%48.4%▼ 20.0%
May43.3%51.4%▲ 18.9%
June67.7%70.3%▲ 3.8%
July75.2%71.3%▼ 5.2%
August75.3%––
September71.2%––
October69.7%–in progress
November66.3%––
December68.4%––
Year-to-date average (Jan–Jul)65.7%62.8%▼ 4.4%

Seasonality · flights (arrivals + departures) by month

Year JanFebMarAprMayJunJulAugSepOctNovDec
2024 1,762 1,723 1,880 930 419 1,335 1,445 1,332 1,124 1,004 753 1,428
2025 1,986 1,737 2,028 965 109 1,184 1,386 1,305 1,118 925 638 1,572
2026 1,939 1,820 2,167 947 375 1,216 1,555
International share 0% of flights (arrivals + departures) in July 2026
Series depth 36 years from 1990

Busiest destinations

Flights recorded between Oct 12, 2024 and Jul 31, 2026, counted from flight records published by the US BTS. Not a current timetable.

Busiest destinations FlightsDistance (km)
Denver International Airport ASE–DEN → 10,012 201
Los Angeles International Airport ASE–LAX → 4,358 1,185
Dallas Fort Worth International Airport ASE–DFW → 4,246 1,128
Chicago O'Hare International Airport ASE–ORD → 3,757 1,627
George Bush Intercontinental Airport ASE–IAH → 2,240 1,470
Hartsfield Jackson Atlanta International Airport ASE–ATL → 1,657 2,095

On-time departures by month

US domestic sectors recorded by BTS

65.9% of 737 timed departures from Aspen-Pitkin County Airport (Sardy Field) left within 15 minutes of schedule in July 2026, according to the US BTS. Cancelled flights are excluded.

The most recent periods18 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January64.7%69.2%▲ 6.9%
February61.9%62.0%▲ 0.1%
March61.9%74.7%▲ 20.7%
April71.1%78.8%▲ 10.8%
May–87.4%–
June57.5%66.4%▲ 15.6%
July62.9%65.9%▲ 4.8%
August66.5%––
September85.0%––
October77.9%–in progress
November88.6%––
December61.1%––

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay08:00–09:0015.6min · 754 recorded · 725 measured
Gap to highest-delay hour39.2min08:00 ↔ 19:00
Recorded flights14,455Aspen-Pitkin County Airport (Sardy Field)

Departure hour

On-time departures Partial coverage: domestic flights only
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 82.3% · 1,737 recorded · 1,664 measured · Source: the US BTS 08:00 · 78.8% · 754 recorded · 725 measured · Source: the US BTS 09:00 · 73.3% · 843 recorded · 814 measured · Source: the US BTS 10:00 · 75.1% · 1,063 recorded · 1,005 measured · Source: the US BTS 11:00 · 69.3% · 1,131 recorded · 1,070 measured · Source: the US BTS 12:00 · 64.7% · 2,315 recorded · 2,168 measured · Source: the US BTS 13:00 · 63.4% · 2,002 recorded · 1,861 measured · Source: the US BTS 14:00 · 60.7% · 1,087 recorded · 994 measured · Source: the US BTS 15:00 · 59.2% · 1,171 recorded · 1,064 measured · Source: the US BTS 16:00 · 57.0% · 776 recorded · 695 measured · Source: the US BTS 17:00 · 76.1% · 409 recorded · 377 measured · Source: the US BTS 18:00 · 67.8% · 638 recorded · 578 measured · Source: the US BTS 19:00 · 60.1% · 416 recorded · 378 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 113 recorded · 104 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: domestic flights only
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 16.1 min · 1,737 recorded · 1,664 measured · Source: the US BTS 08:00 · 15.6 min · 754 recorded · 725 measured · Source: the US BTS 09:00 · 20.9 min · 843 recorded · 814 measured · Source: the US BTS 10:00 · 17.8 min · 1,063 recorded · 1,005 measured · Source: the US BTS 11:00 · 28.4 min · 1,131 recorded · 1,070 measured · Source: the US BTS 12:00 · 31.6 min · 2,315 recorded · 2,168 measured · Source: the US BTS 13:00 · 38.2 min · 2,002 recorded · 1,861 measured · Source: the US BTS 14:00 · 39.5 min · 1,087 recorded · 994 measured · Source: the US BTS 15:00 · 44.6 min · 1,171 recorded · 1,064 measured · Source: the US BTS 16:00 · 46.3 min · 776 recorded · 695 measured · Source: the US BTS 17:00 · 19.8 min · 409 recorded · 377 measured · Source: the US BTS 18:00 · 28.1 min · 638 recorded · 578 measured · Source: the US BTS 19:00 · 54.8 min · 416 recorded · 378 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 113 recorded · 104 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: domestic flights only
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 1,737 · 1,737 recorded · 1,664 measured · Source: the US BTS 08:00 · 754 · 754 recorded · 725 measured · Source: the US BTS 09:00 · 843 · 843 recorded · 814 measured · Source: the US BTS 10:00 · 1,063 · 1,063 recorded · 1,005 measured · Source: the US BTS 11:00 · 1,131 · 1,131 recorded · 1,070 measured · Source: the US BTS 12:00 · 2,315 · 2,315 recorded · 2,168 measured · Source: the US BTS 13:00 · 2,002 · 2,002 recorded · 1,861 measured · Source: the US BTS 14:00 · 1,087 · 1,087 recorded · 994 measured · Source: the US BTS 15:00 · 1,171 · 1,171 recorded · 1,064 measured · Source: the US BTS 16:00 · 776 · 776 recorded · 695 measured · Source: the US BTS 17:00 · 409 · 409 recorded · 377 measured · Source: the US BTS 18:00 · 638 · 638 recorded · 578 measured · Source: the US BTS 19:00 · 416 · 416 recorded · 378 measured · Source: the US BTS 20:00 · 113 · 113 recorded · 104 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:00No observations———
07:0082.3%16.1 min1,6641,737
08:0078.8%15.6 min725754
09:0073.3%20.9 min814843
10:0075.1%17.8 min1,0051,063
11:0069.3%28.4 min1,0701,131
12:0064.7%31.6 min2,1682,315
13:0063.4%38.2 min1,8612,002
14:0060.7%39.5 min9941,087
15:0059.2%44.6 min1,0641,171
16:0057.0%46.3 min695776
17:0076.1%19.8 min377409
18:0067.8%28.1 min578638
19:0060.1%54.8 min378416
20:00Fewer than 200 measured departures—104113
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: domestic flights only
Monday · 67.1% · 2,080 recorded · 1,955 measured · Source: the US BTS Tuesday · 76.0% · 1,884 recorded · 1,736 measured · Source: the US BTS Wednesday · 76.2% · 1,975 recorded · 1,892 measured · Source: the US BTS Thursday · 69.7% · 2,097 recorded · 2,010 measured · Source: the US BTS Friday · 65.2% · 2,140 recorded · 1,945 measured · Source: the US BTS Saturday · 62.6% · 2,144 recorded · 1,958 measured · Source: the US BTS Sunday · 64.1% · 2,135 recorded · 2,001 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: domestic flights only
Monday · 33.7 min · 2,080 recorded · 1,955 measured · Source: the US BTS Tuesday · 19.1 min · 1,884 recorded · 1,736 measured · Source: the US BTS Wednesday · 16.6 min · 1,975 recorded · 1,892 measured · Source: the US BTS Thursday · 27.6 min · 2,097 recorded · 2,010 measured · Source: the US BTS Friday · 31.7 min · 2,140 recorded · 1,945 measured · Source: the US BTS Saturday · 44.3 min · 2,144 recorded · 1,958 measured · Source: the US BTS Sunday · 36.3 min · 2,135 recorded · 2,001 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: domestic flights only
Monday · 2,080 · 2,080 recorded · 1,955 measured · Source: the US BTS Tuesday · 1,884 · 1,884 recorded · 1,736 measured · Source: the US BTS Wednesday · 1,975 · 1,975 recorded · 1,892 measured · Source: the US BTS Thursday · 2,097 · 2,097 recorded · 2,010 measured · Source: the US BTS Friday · 2,140 · 2,140 recorded · 1,945 measured · Source: the US BTS Saturday · 2,144 · 2,144 recorded · 1,958 measured · Source: the US BTS Sunday · 2,135 · 2,135 recorded · 2,001 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday67.1%33.7 min1,9552,080
Tuesday76.0%19.1 min1,7361,884
Wednesday76.2%16.6 min1,8921,975
Thursday69.7%27.6 min2,0102,097
Friday65.2%31.7 min1,9452,140
Saturday62.6%44.3 min1,9582,144
Sunday64.1%36.3 min2,0012,135

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: domestic flights only
Jan · 66.9% · 2,062 recorded · 1,915 measured · Source: the US BTS Feb · 62.0% · 1,942 recorded · 1,743 measured · Source: the US BTS Mar · 68.6% · 2,269 recorded · 2,046 measured · Source: the US BTS Apr · 75.0% · 983 recorded · 938 measured · Source: the US BTS May · 85.2% · 237 recorded · 237 measured · Source: the US BTS Jun · 62.1% · 1,222 recorded · 1,139 measured · Source: the US BTS Jul · 64.5% · 1,468 recorded · 1,392 measured · Source: the US BTS Aug · 66.5% · 659 recorded · 633 measured · Source: the US BTS Sep · 85.0% · 550 recorded · 548 measured · Source: the US BTS Oct · 81.2% · 757 recorded · 756 measured · Source: the US BTS Nov · 82.8% · 738 recorded · 682 measured · Source: the US BTS Dec · 61.7% · 1,568 recorded · 1,468 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: domestic flights only
Jan · 34.0 min · 2,062 recorded · 1,915 measured · Source: the US BTS Feb · 36.1 min · 1,942 recorded · 1,743 measured · Source: the US BTS Mar · 24.6 min · 2,269 recorded · 2,046 measured · Source: the US BTS Apr · 15.5 min · 983 recorded · 938 measured · Source: the US BTS May · 1.9 min · 237 recorded · 237 measured · Source: the US BTS Jun · 46.0 min · 1,222 recorded · 1,139 measured · Source: the US BTS Jul · 38.0 min · 1,468 recorded · 1,392 measured · Source: the US BTS Aug · 35.0 min · 659 recorded · 633 measured · Source: the US BTS Sep · 8.8 min · 550 recorded · 548 measured · Source: the US BTS Oct · 11.1 min · 757 recorded · 756 measured · Source: the US BTS Nov · 12.1 min · 738 recorded · 682 measured · Source: the US BTS Dec · 43.9 min · 1,568 recorded · 1,468 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: domestic flights only
Jan · 2,062 · 2,062 recorded · 1,915 measured · Source: the US BTS Feb · 1,942 · 1,942 recorded · 1,743 measured · Source: the US BTS Mar · 2,269 · 2,269 recorded · 2,046 measured · Source: the US BTS Apr · 983 · 983 recorded · 938 measured · Source: the US BTS May · 237 · 237 recorded · 237 measured · Source: the US BTS Jun · 1,222 · 1,222 recorded · 1,139 measured · Source: the US BTS Jul · 1,468 · 1,468 recorded · 1,392 measured · Source: the US BTS Aug · 659 · 659 recorded · 633 measured · Source: the US BTS Sep · 550 · 550 recorded · 548 measured · Source: the US BTS Oct · 757 · 757 recorded · 756 measured · Source: the US BTS Nov · 738 · 738 recorded · 682 measured · Source: the US BTS Dec · 1,568 · 1,568 recorded · 1,468 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan66.9%34.0 min1,9152,062
Feb62.0%36.1 min1,7431,942
Mar68.6%24.6 min2,0462,269
Apr75.0%15.5 min938983
May85.2%1.9 min237237
Jun62.1%46.0 min1,1391,222
Jul64.5%38.0 min1,3921,468
Aug66.5%35.0 min633659
Sep85.0%8.8 min548550
Oct81.2%11.1 min756757
Nov82.8%12.1 min682738
Dec61.7%43.9 min1,4681,568

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 64.0% 9,246
  • Delayed >15 min 29.4% 4,251
  • Cancelled 6.6% 958
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Environment

Air pollutants at the airport (EPA estimate)

Modelled estimate, not a measurement: aircraft below 3,000 ft (landing and take-off), ground support equipment and auxiliary power units, plus any stationary sources the state reported at the airport site. Cruise emissions are not included.

In 2023, the US EPA estimated 27.5 tonnes of nitrogen oxides (NOₓ) and 3.4 tonnes of fine particles (PM2.5) from activity at Aspen-Pitkin County Airport (Sardy Field), according to the EPA National Emissions Inventory.

PollutantUnit201720202023
NOₓ (Nitrogen oxides)tonnes24.216.927.5
CO (Carbon monoxide)tonnes139108107
SO₂ (Sulphur dioxide)tonnes4.22.64.0
VOC (Volatile organic compounds)tonnes6.29.87.5
PM2.5 (Fine particles)tonnes2.42.93.4
PM10 (Particulate matter)tonnes2.83.33.8
Leadkg51.050.457.6
CO₂ (Carbon dioxide)tonnes8,72610,956—

The inventory is published every three years. Coverage changes between editions (about 19,300 airport sites in 2017, 6,000 in 2020, 12,700 in 2023), 2020 reflects the pandemic drop in traffic, and EPA updates its aircraft model between editions — so the columns are not a trend (Los Angeles: 3,562 tonnes of NOₓ in 2017, 8,810 in 2023). CO₂ is only reported for some sites in 2017, for all sites in 2020, and not at all in 2023. EPA publishes US customary units; converted here to metric tonnes (× 0.907) and, for lead, kilograms.

US EPA — National Emissions Inventory

How to read this chart

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