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Ellison Onizuka Kona International Airport at Keāhole (KOA)

Ellison Onizuka Kona International Airport at Keāhole handled 376,759 passengers in July 2026, down 2.5% 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
January3,2373,402▲ 5.1%
February2,9473,088▲ 4.8%
March3,2773,316▲ 1.2%
April3,0553,213▲ 5.2%
May3,1553,202▲ 1.5%
June3,0993,272▲ 5.6%
July3,2553,177▼ 2.4%
August3,142––
September2,800––
October2,979–in progress
November2,968––
December3,346––
Year to date (Jan–Jul)22,02522,670▲ 2.9%

Passengers over time

Full count · domestic + international
The most recent periods19 periods
PeriodPassengers 2025Passengers 2026Change vs last year
January356,761350,506▼ 1.8%
February319,582326,425▲ 2.1%
March368,578366,269▼ 0.6%
April331,389323,917▼ 2.3%
May329,207318,979▼ 3.1%
June363,023357,340▼ 1.6%
July386,375376,759▼ 2.5%
August346,341––
September274,983––
October312,368–in progress
November308,692––
December368,872––
Year to date (Jan–Jul)2,454,9152,420,195▼ 1.4%

Tonnes of cargo over time

Full count · domestic + international
The most recent periods19 periods
PeriodTonnes of cargo 2025Tonnes of cargo 2026Change vs last year
January4,9363,874▼ 21.5%
February4,5833,752▼ 18.1%
March4,7234,038▼ 14.5%
April4,7565,326▲ 12.0%
May4,5294,581▲ 1.1%
June4,3164,984▲ 15.5%
July4,4804,170▼ 6.9%
August4,624––
September4,827––
October4,753–in progress
November3,806––
December4,414––
Year to date (Jan–Jul)32,32430,725▼ 4.9%

Seats offered over time

Full count · domestic + international
The most recent periods19 periods
PeriodSeats offered 2025Seats offered 2026Change vs last year
January472,353488,198▲ 3.4%
February419,605440,702▲ 5.0%
March466,758489,132▲ 4.8%
April422,839440,806▲ 4.2%
May425,463429,808▲ 1.0%
June432,037445,965▲ 3.2%
July447,175459,623▲ 2.8%
August426,924––
September381,028––
October406,826–in progress
November419,269––
December483,094––
Year to date (Jan–Jul)3,086,2303,194,234▲ 3.5%

Domestic / International

Domestic / International — flights (arrivals + departures)

Full count · domestic + international

Domestic

The most recent periods15 periods
PeriodFlights (arrivals + departures) 2025Flights (arrivals + departures) 2026Change vs last year
January3,1613,323▲ 5.1%
February2,8703,012▲ 4.9%
March3,1893,235▲ 1.4%
April2,9983,156▲ 5.3%
May3,1513,201▲ 1.6%
June3,098––
July3,252––
August–––
September–––
October2,968–in progress
November2,913––
December3,265––
Year to date (Jan–May)15,36915,927▲ 3.6%

International

The most recent periods15 periods
PeriodFlights (arrivals + departures) 2025Flights (arrivals + departures) 2026Change vs last year
January7679▲ 3.9%
February7776▼ 1.3%
March8881▼ 8.0%
April57570.0%
May41▼ 75.0%
June1––
July3––
August–––
September–––
October11–in progress
November55––
December81––
Year to date (Jan–May)302294▼ 2.6%

Domestic / International — passengers

Full count · domestic + international

Domestic

The most recent periods15 periods
PeriodPassengers 2025Passengers 2026Change vs last year
January345,513339,117▼ 1.9%
February308,095315,434▲ 2.4%
March355,510355,229▼ 0.1%
April323,699316,948▼ 2.1%
May329,142318,971▼ 3.1%
June363,021––
July386,352––
August–––
September–––
October311,508–in progress
November301,379––
December358,461––
Year to date (Jan–May)1,661,9591,645,699▼ 1.0%

International

The most recent periods15 periods
PeriodPassengers 2025Passengers 2026Change vs last year
January11,24811,389▲ 1.3%
February11,48710,991▼ 4.3%
March13,06811,040▼ 15.5%
April7,6906,969▼ 9.4%
May658▼ 87.7%
June2––
July23––
August–––
September–––
October860–in progress
November7,313––
December10,411––
Year to date (Jan–May)43,55840,397▼ 7.3%

Domestic / International — seats offered

Full count · domestic + international

Domestic

The most recent periods15 periods
PeriodSeats offered 2025Seats offered 2026Change vs last year
January459,909474,201▲ 3.1%
February406,807427,714▲ 5.1%
March451,576475,964▲ 5.4%
April413,213431,488▲ 4.4%
May425,361429,794▲ 1.0%
June432,023––
July447,116––
August–––
September–––
October405,396–in progress
November410,179––
December469,610––
Year to date (Jan–May)2,156,8662,239,161▲ 3.8%

International

The most recent periods15 periods
PeriodSeats offered 2025Seats offered 2026Change vs last year
January12,44413,997▲ 12.5%
February12,79812,988▲ 1.5%
March15,18213,168▼ 13.3%
April9,6269,318▼ 3.2%
May10214▼ 86.3%
June14––
July59––
August–––
September–––
October1,430–in progress
November9,090––
December13,484––
Year to date (Jan–May)50,15249,485▼ 1.3%

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
January75.5%71.8%▼ 4.9%
February76.2%74.1%▼ 2.7%
March79.0%74.9%▼ 5.2%
April78.4%73.5%▼ 6.2%
May77.4%74.2%▼ 4.1%
June84.0%80.1%▼ 4.6%
July86.4%82.0%▼ 5.1%
August81.1%––
September72.2%––
October76.8%–in progress
November73.6%––
December76.4%––
Year-to-date average (Jan–Jul)79.5%75.8%▼ 4.7%

Seasonality · flights (arrivals + departures) by month

Year JanFebMarAprMayJunJulAugSepOctNovDec
2024 3,484 3,236 3,495 3,247 3,247 3,409 3,542 3,341 3,139 3,224 3,076 3,345
2025 3,237 2,947 3,277 3,055 3,155 3,099 3,255 3,142 2,800 2,979 2,968 3,346
2026 3,402 3,088 3,316 3,213 3,202 3,272 3,177
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)
Daniel K. Inouye International Airport KOA–HNL → 27,008 263
Los Angeles International Airport KOA–LAX → 5,802 4,026
Kahului International Airport KOA–OGG → 5,281 135
Seattle–Tacoma International Airport KOA–SEA → 5,105 4,327
San Francisco International Airport KOA–SFO → 3,441 3,808
Sacramento International Airport KOA–SMF → 1,591 3,917
Phoenix Sky Harbor International Airport KOA–PHX → 1,392 4,598
Denver International Airport KOA–DEN → 1,326 5,351
Harry Reid International Airport KOA–LAS → 1,316 4,369
Lihue Airport KOA–LIH → 1,316 423

On-time departures by month

US domestic sectors recorded by BTS

88.1% of 1,408 timed departures from Ellison Onizuka Kona International Airport at Keāhole left within 15 minutes of schedule in July 2026, according to the US BTS. Cancelled flights are excluded.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January91.0%83.2%▼ 8.5%
February91.5%85.9%▼ 6.2%
March88.3%81.6%▼ 7.6%
April90.0%87.6%▼ 2.7%
May93.1%88.3%▼ 5.1%
June86.2%90.0%▲ 4.5%
July86.3%88.1%▲ 2.1%
August91.1%––
September93.5%––
October88.0%–in progress
November88.7%––
December82.7%––
Year-to-date average (Jan–Jul)89.5%86.4%▼ 3.5%

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 delay07:00–08:00-2.9min · 728 recorded · 724 measured
Gap to highest-delay hour13.9min07:00 ↔ 21:00
Recorded flights28,924Ellison Onizuka Kona International Airport at Keāhole

Departure hour

On-time departures Partial coverage: domestic flights only
00:00 · Fewer than 200 measured departures · 8 recorded · 8 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 · 96.0% · 1,220 recorded · 1,214 measured · Source: the US BTS 07:00 · 96.4% · 728 recorded · 724 measured · Source: the US BTS 08:00 · 95.2% · 2,370 recorded · 2,338 measured · Source: the US BTS 09:00 · 94.7% · 1,289 recorded · 1,280 measured · Source: the US BTS 10:00 · 93.5% · 2,067 recorded · 2,058 measured · Source: the US BTS 11:00 · 89.0% · 2,067 recorded · 2,044 measured · Source: the US BTS 12:00 · 82.9% · 1,669 recorded · 1,657 measured · Source: the US BTS 13:00 · 84.6% · 3,049 recorded · 3,030 measured · Source: the US BTS 14:00 · 81.4% · 2,145 recorded · 2,130 measured · Source: the US BTS 15:00 · 83.4% · 2,251 recorded · 2,231 measured · Source: the US BTS 16:00 · 87.1% · 1,424 recorded · 1,405 measured · Source: the US BTS 17:00 · 79.1% · 949 recorded · 935 measured · Source: the US BTS 18:00 · 85.0% · 993 recorded · 984 measured · Source: the US BTS 19:00 · 89.7% · 1,487 recorded · 1,467 measured · Source: the US BTS 20:00 · 90.8% · 1,513 recorded · 1,494 measured · Source: the US BTS 21:00 · 88.9% · 2,496 recorded · 2,460 measured · Source: the US BTS 22:00 · 91.6% · 851 recorded · 836 measured · Source: the US BTS 23:00 · 89.3% · 348 recorded · 346 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 · Fewer than 200 measured departures · 8 recorded · 8 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 · -1.8 min · 1,220 recorded · 1,214 measured · Source: the US BTS 07:00 · -2.9 min · 728 recorded · 724 measured · Source: the US BTS 08:00 · -0.8 min · 2,370 recorded · 2,338 measured · Source: the US BTS 09:00 · 0.8 min · 1,289 recorded · 1,280 measured · Source: the US BTS 10:00 · 1.5 min · 2,067 recorded · 2,058 measured · Source: the US BTS 11:00 · 5.0 min · 2,067 recorded · 2,044 measured · Source: the US BTS 12:00 · 7.4 min · 1,669 recorded · 1,657 measured · Source: the US BTS 13:00 · 6.9 min · 3,049 recorded · 3,030 measured · Source: the US BTS 14:00 · 8.9 min · 2,145 recorded · 2,130 measured · Source: the US BTS 15:00 · 8.4 min · 2,251 recorded · 2,231 measured · Source: the US BTS 16:00 · 5.2 min · 1,424 recorded · 1,405 measured · Source: the US BTS 17:00 · 9.5 min · 949 recorded · 935 measured · Source: the US BTS 18:00 · 5.7 min · 993 recorded · 984 measured · Source: the US BTS 19:00 · 3.6 min · 1,487 recorded · 1,467 measured · Source: the US BTS 20:00 · 1.3 min · 1,513 recorded · 1,494 measured · Source: the US BTS 21:00 · 11.0 min · 2,496 recorded · 2,460 measured · Source: the US BTS 22:00 · 1.9 min · 851 recorded · 836 measured · Source: the US BTS 23:00 · 1.4 min · 348 recorded · 346 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 · 8 · 8 recorded · 8 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 · 1,220 · 1,220 recorded · 1,214 measured · Source: the US BTS 07:00 · 728 · 728 recorded · 724 measured · Source: the US BTS 08:00 · 2,370 · 2,370 recorded · 2,338 measured · Source: the US BTS 09:00 · 1,289 · 1,289 recorded · 1,280 measured · Source: the US BTS 10:00 · 2,067 · 2,067 recorded · 2,058 measured · Source: the US BTS 11:00 · 2,067 · 2,067 recorded · 2,044 measured · Source: the US BTS 12:00 · 1,669 · 1,669 recorded · 1,657 measured · Source: the US BTS 13:00 · 3,049 · 3,049 recorded · 3,030 measured · Source: the US BTS 14:00 · 2,145 · 2,145 recorded · 2,130 measured · Source: the US BTS 15:00 · 2,251 · 2,251 recorded · 2,231 measured · Source: the US BTS 16:00 · 1,424 · 1,424 recorded · 1,405 measured · Source: the US BTS 17:00 · 949 · 949 recorded · 935 measured · Source: the US BTS 18:00 · 993 · 993 recorded · 984 measured · Source: the US BTS 19:00 · 1,487 · 1,487 recorded · 1,467 measured · Source: the US BTS 20:00 · 1,513 · 1,513 recorded · 1,494 measured · Source: the US BTS 21:00 · 2,496 · 2,496 recorded · 2,460 measured · Source: the US BTS 22:00 · 851 · 851 recorded · 836 measured · Source: the US BTS 23:00 · 348 · 348 recorded · 346 measured · Source: the US BTS

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

View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00Fewer than 200 measured departures—88
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:0096.0%-1.8 min1,2141,220
07:0096.4%-2.9 min724728
08:0095.2%-0.8 min2,3382,370
09:0094.7%0.8 min1,2801,289
10:0093.5%1.5 min2,0582,067
11:0089.0%5.0 min2,0442,067
12:0082.9%7.4 min1,6571,669
13:0084.6%6.9 min3,0303,049
14:0081.4%8.9 min2,1302,145
15:0083.4%8.4 min2,2312,251
16:0087.1%5.2 min1,4051,424
17:0079.1%9.5 min935949
18:0085.0%5.7 min984993
19:0089.7%3.6 min1,4671,487
20:0090.8%1.3 min1,4941,513
21:0088.9%11.0 min2,4602,496
22:0091.6%1.9 min836851
23:0089.3%1.4 min346348

Day of week

On-time departures Partial coverage: domestic flights only
Monday · 89.7% · 4,194 recorded · 4,159 measured · Source: the US BTS Tuesday · 90.1% · 3,978 recorded · 3,941 measured · Source: the US BTS Wednesday · 89.5% · 4,011 recorded · 3,991 measured · Source: the US BTS Thursday · 87.1% · 4,154 recorded · 4,099 measured · Source: the US BTS Friday · 86.4% · 4,177 recorded · 4,128 measured · Source: the US BTS Saturday · 87.2% · 4,368 recorded · 4,313 measured · Source: the US BTS Sunday · 88.9% · 4,042 recorded · 4,010 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 · 3.5 min · 4,194 recorded · 4,159 measured · Source: the US BTS Tuesday · 3.3 min · 3,978 recorded · 3,941 measured · Source: the US BTS Wednesday · 3.4 min · 4,011 recorded · 3,991 measured · Source: the US BTS Thursday · 7.2 min · 4,154 recorded · 4,099 measured · Source: the US BTS Friday · 7.7 min · 4,177 recorded · 4,128 measured · Source: the US BTS Saturday · 4.9 min · 4,368 recorded · 4,313 measured · Source: the US BTS Sunday · 3.4 min · 4,042 recorded · 4,010 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 · 4,194 · 4,194 recorded · 4,159 measured · Source: the US BTS Tuesday · 3,978 · 3,978 recorded · 3,941 measured · Source: the US BTS Wednesday · 4,011 · 4,011 recorded · 3,991 measured · Source: the US BTS Thursday · 4,154 · 4,154 recorded · 4,099 measured · Source: the US BTS Friday · 4,177 · 4,177 recorded · 4,128 measured · Source: the US BTS Saturday · 4,368 · 4,368 recorded · 4,313 measured · Source: the US BTS Sunday · 4,042 · 4,042 recorded · 4,010 measured · Source: the US BTS

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

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday89.7%3.5 min4,1594,194
Tuesday90.1%3.3 min3,9413,978
Wednesday89.5%3.4 min3,9914,011
Thursday87.1%7.2 min4,0994,154
Friday86.4%7.7 min4,1284,177
Saturday87.2%4.9 min4,3134,368
Sunday88.9%3.4 min4,0104,042

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 · 87.0% · 2,801 recorded · 2,763 measured · Source: the US BTS Feb · 88.6% · 2,504 recorded · 2,490 measured · Source: the US BTS Mar · 85.0% · 2,832 recorded · 2,757 measured · Source: the US BTS Apr · 88.8% · 2,572 recorded · 2,553 measured · Source: the US BTS May · 90.7% · 2,682 recorded · 2,665 measured · Source: the US BTS Jun · 88.1% · 2,700 recorded · 2,687 measured · Source: the US BTS Jul · 87.2% · 2,797 recorded · 2,776 measured · Source: the US BTS Aug · 91.1% · 1,343 recorded · 1,339 measured · Source: the US BTS Sep · 93.5% · 1,234 recorded · 1,228 measured · Source: the US BTS Oct · 88.9% · 2,147 recorded · 2,123 measured · Source: the US BTS Nov · 90.6% · 2,532 recorded · 2,500 measured · Source: the US BTS Dec · 85.9% · 2,780 recorded · 2,760 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 · 5.8 min · 2,801 recorded · 2,763 measured · Source: the US BTS Feb · 3.8 min · 2,504 recorded · 2,490 measured · Source: the US BTS Mar · 9.7 min · 2,832 recorded · 2,757 measured · Source: the US BTS Apr · 4.5 min · 2,572 recorded · 2,553 measured · Source: the US BTS May · 3.7 min · 2,682 recorded · 2,665 measured · Source: the US BTS Jun · 6.3 min · 2,700 recorded · 2,687 measured · Source: the US BTS Jul · 5.8 min · 2,797 recorded · 2,776 measured · Source: the US BTS Aug · 2.3 min · 1,343 recorded · 1,339 measured · Source: the US BTS Sep · 0.4 min · 1,234 recorded · 1,228 measured · Source: the US BTS Oct · 3.9 min · 2,147 recorded · 2,123 measured · Source: the US BTS Nov · 2.6 min · 2,532 recorded · 2,500 measured · Source: the US BTS Dec · 4.5 min · 2,780 recorded · 2,760 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 · 2,801 · 2,801 recorded · 2,763 measured · Source: the US BTS Feb · 2,504 · 2,504 recorded · 2,490 measured · Source: the US BTS Mar · 2,832 · 2,832 recorded · 2,757 measured · Source: the US BTS Apr · 2,572 · 2,572 recorded · 2,553 measured · Source: the US BTS May · 2,682 · 2,682 recorded · 2,665 measured · Source: the US BTS Jun · 2,700 · 2,700 recorded · 2,687 measured · Source: the US BTS Jul · 2,797 · 2,797 recorded · 2,776 measured · Source: the US BTS Aug · 1,343 · 1,343 recorded · 1,339 measured · Source: the US BTS Sep · 1,234 · 1,234 recorded · 1,228 measured · Source: the US BTS Oct · 2,147 · 2,147 recorded · 2,123 measured · Source: the US BTS Nov · 2,532 · 2,532 recorded · 2,500 measured · Source: the US BTS Dec · 2,780 · 2,780 recorded · 2,760 measured · Source: the US BTS

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

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan87.0%5.8 min2,7632,801
Feb88.6%3.8 min2,4902,504
Mar85.0%9.7 min2,7572,832
Apr88.8%4.5 min2,5532,572
May90.7%3.7 min2,6652,682
Jun88.1%6.3 min2,6872,700
Jul87.2%5.8 min2,7762,797
Aug91.1%2.3 min1,3391,343
Sep93.5%0.4 min1,2281,234
Oct88.9%3.9 min2,1232,147
Nov90.6%2.6 min2,5002,532
Dec85.9%4.5 min2,7602,780

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 87.5% 25,318
  • Delayed >15 min 11.5% 3,323
  • Cancelled 1.0% 283
  • 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

Airport Carbon Accreditation

Level 3 Ellison Onizuka Kona International Airport at Keāhole holds Airport Carbon Accreditation Level 3 (status checked October 2026), according to the programme's public list.

A certification of how the airport operator manages its own carbon emissions (levels 1–5, "+" = with offsetting). It is not a measure of how much the airport or its flights emit.

Airport Carbon Accreditation (ACI)

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 207 tonnes of nitrogen oxides (NOₓ) and 7.4 tonnes of fine particles (PM2.5) from activity at Ellison Onizuka Kona International Airport at Keāhole, according to the EPA National Emissions Inventory.

PollutantUnit201720202023
NOₓ (Nitrogen oxides)tonnes20487.4207
CO (Carbon monoxide)tonnes685325344
SO₂ (Sulphur dioxide)tonnes29.311.019.2
VOC (Volatile organic compounds)tonnes78.663.231.6
PM2.5 (Fine particles)tonnes11.96.67.4
PM10 (Particulate matter)tonnes13.17.38.3
Leadkg188129155
CO₂ (Carbon dioxide)tonnes51,96031,920—

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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