Airports / Florida Keys Marathon International Airport

Florida Keys Marathon International Airport(KMTH)

Marathon, United States

Last updated: Mar 28, 2026

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Viewing period:
Compared to: preceding 12 months · Apr 2024 – Apr 2025
Apr 2025 – Mar 2026·vs Apr 2024 – Apr 2025· Emissions increasing vs prior period

Activity Summary

2,648.4
Tons CO2 Total
3.4
Avg CO2/Flight
1,028
Flights Total
Emissions Intensity0.01t CO₂/nm
437.3 tons CO2 in selected period

Airport Patterns

Emissions up 81% vs prior period — significantly busier than prior period

437t
Total CO₂
3.4t
Avg CO₂/flight
1,028
Flights
Operator Profile

Charter/owner classification not available for this airport's flights

Emissions
139%
1,106t → 2,648t CO₂
CO₂ Intensity
16%
2.9t → 3.4t per departure
Flight Count
593
435 → 1028 flights
New Routes
223
1,185t CO₂ combined
Dropped Routes
103
Prior period only
New Aircraft
603
603 new tail numbers
Top Destinations
Buenos Aires41.0t CO₂
1 flight · avg 41.0t/flight
Iowa City35.6t CO₂
1 flight · avg 35.6t/flight
Buffalo32.8t CO₂
5 flights · avg 6.6t/flight
San Jose22.4t CO₂
1 flight · avg 22.4t/flight
George Town13.2t CO₂
10 flights · avg 1.3t/flight

Spikes

Significant deviations from this airport's baseline in the selected period.

CO₂ Above Baseline

413t

Signals Detected

4

Highest Severity

High

MediumApr 9, 2025 – Apr 15, 2025

Elevated activity Apr 9, 2025 – Apr 15, 2025 — 40 flights in 7 days vs baseline of 20

40 flights recorded in a 7-day window, exceeding the airport baseline of 20 flights per week by 101%.

105.0t CO₂

MediumNov 29, 2025 – Dec 5, 2025

Elevated activity Nov 29, 2025 – Dec 5, 2025 — 41 flights in 7 days vs baseline of 20

41 flights recorded in a 7-day window, exceeding the airport baseline of 20 flights per week by 106%.

146.5t CO₂

MediumDec 21, 2025 – Dec 27, 2025

Elevated activity Dec 21, 2025 – Dec 27, 2025 — 40 flights in 7 days vs baseline of 20

40 flights recorded in a 7-day window, exceeding the airport baseline of 20 flights per week by 101%.

120.4t CO₂

HighDec 3, 2025

Single high-emission departure N450LV → SAEZ on Dec 3, 2025 — 41.0t CO₂, 64% of day's total

Aircraft N450LV departing to SAEZ produced 41.0t CO₂, representing 64% of all airport emissions on Dec 3, 2025.

41.0t CO₂

Route Map

Top Routes by Emissions
MarathonBuenos Aires

KMTH to SAEZ · 4,371 miles

Total Flights

1

Avg CO₂/Flight

41.0t

Total Emissions

41.0t CO₂

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
MarathonIowa City

KMTH to KIOW · 1,314 miles

Total Flights

1

Avg CO₂/Flight

35.6t

Total Emissions

35.6t CO₂

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
MarathonBuffalo

KMTH to KBUF · 1,266 miles

Total Flights

5

Avg CO₂/Flight

6.6t

Total Emissions

32.8t CO₂

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
MarathonSan Jose

KMTH to KSJC · 2,549 miles

Total Flights

1

Avg CO₂/Flight

22.4t

Total Emissions

22.4t CO₂

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
MarathonGeorge Town

KMTH to MWCR · 376 miles

Total Flights

10

Avg CO₂/Flight

1.3t

Total Emissions

13.2t CO₂

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
MarathonToronto

KMTH to CYYZ · 1,312 miles

Total Flights

2

Avg CO₂/Flight

6.6t

Total Emissions

13.2t CO₂

Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Page 1 of 13
Aircraft Using This Airport
View All Aircraft
N450LVCharter·Gulfstream GIV
41.0t CO₂ · avg 41.0t/visit · 1 visit · Last seen 3 Dec 2025
N97VSCharter·Cessna Citation XLS
39.4t CO₂ · avg 9.8t/visit · 4 visits · Last seen 8 Mar 2026
N82RP·Dassault Falcon 7X
34.6t CO₂ · avg 1.6t/visit · 21 visits · Last seen 28 Mar 2026
N808CFCharter·Gulfstream GIV
25.5t CO₂ · avg 12.8t/visit · 2 visits · Last seen 28 Oct 2025
N874QSCharter·Cessna Citation Longitude
11.6t CO₂ · avg 3.9t/visit · 3 visits · Last seen 10 Jan 2026
N60QJ·Gulfstream G600
11.3t CO₂ · avg 5.6t/visit · 2 visits · Last seen 13 Mar 2026
N980JSCharter·Cessna Citation X
10.8t CO₂ · avg 5.4t/visit · 2 visits · Last seen 2 Dec 2025
N650JD·Gulfstream G600
9.8t CO₂ · avg 4.9t/visit · 2 visits · Last seen 29 May 2025
N6464Charter·Cessna Citation Sovereign
8.7t CO₂ · avg 1.0t/visit · 9 visits · Last seen 23 Jan 2026
N8RM·Gulfstream GV
8.3t CO₂ · avg 4.1t/visit · 2 visits · Last seen 26 Oct 2025
Page 1 of 70

Recent Flights

10 total flights recorded

Showing most recent flights — not filtered by viewing period