The Florida Keys Marathon International
MTH · KMTH · Marathon, Florida · Monroe County · map
The Florida Keys Marathon International is a public-use airport owned by Monroe County, 3 miles east of Marathon, Florida, 7 feet above sea level. Its one runway, 07/25, is 5,008 feet of asphalt. It has fuel (100LL avgas, Jet A-1 with additive).
Weather right now KMTH · observed 2:53 pm EDT (18:53 UTC), 62 minutes ago
VFR good flying weather
- Wind from the east-southeast (120°) at 6 knots
- Visibility 10 miles or more
- Temperature 86°F (30°C), dew point 76°F (24°C)
- Altimeter 29.86 inHg
The forecast issued Tue 1:20 pm EDT (17:20 UTC), good until Wed 2:00 pm EDT (18:00 UTC)
- From Tue 2:00 pm EDT (18:00 UTC): wind from the south-southeast at 6 knots, visibility more than 6 miles, a few clouds at 2,500 feet VFR
- From Tue 11:00 pm EDT (03:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, a few clouds at 2,500 feet, scattered clouds at 15,000 feet VFR
The codes as issued (METAR and TAF)
METAR KMTH 061853Z AUTO 12006KT 10SM CLR 30/24 A2986 RMK AO2 SLP110 T03000244
TAF KMTH 061720Z 0618/0718 15006KT P6SM FEW025 FM070300 17004KT P6SM FEW025 SCT150
From the National Weather Service's aviation weather service, refreshed every few minutes; times are local to the airport with UTC in brackets. For a flight, get your briefing from Flight Service or an approved provider.
The airport
- Codes
- FAA MTH · ICAO KMTH
- Kind
- Airport · open to the public · publicly owned
- Owner
- Monroe County
- Elevation
- 7 feet above sea level
- Control tower
- No control tower
- Attended
- every day, 8:00 am to 6:00 pm
- Lights
- runway lights see the remarks below; beacon sunset to sunrise
- Fuel
- 100LL avgas, Jet A-1 with additive
- Repairs
- airframe: minor repairs; engine: minor repairs
- Parking
- tiedown
- Notes
- certified for airline service (Part 139)
- On the chart
- Miami sectional
- Magnetic variation
- 4W
- In the FAA's files since
- March 1944
Runway
Drawn to scale from the FAA's runway positions, north up. Not for navigation.
| Runway | Length × width | Surface | Lights |
|---|---|---|---|
| 07/25 | 5,008 × 100 ft | Asphalt, excellent | Medium-intensity lights |
- Runway 07: PAPI, four lights on the left, tree 40 ft high 1,700 ft from the end
- Runway 25: PAPI, four lights on the left, tree 65 ft high 2,440 ft from the end
Radio frequencies
| Common traffic advisory (CTAF) · UNICOM | 122.975 | |
| Key West Center (remote transmitter) Low | 133.5 | |
| Mth and automated weather (ASOS) | 135.525 |
Automated weather (ASOS), by phone 305-743-8373.
Wind map live wind over the area, from Windy.com
Colours show wind speed, the moving lines its direction; drag the time bar for the coming days. Map and forecast by Windy.com.
Aircraft registered in Marathon from the FAA register
46 aircraft are registered to owners in Marathon, Florida: 33 piston singles, 8 helicopters, 3 piston twins, 2 weight-shift and powered parachutes. Not every one of them is based at this airport; the based-aircraft count above is the FAA's figure for this airport alone.
Companies and organisations in town with two or more aircraft:
Individuals are counted, never named. All aircraft registered in Florida.
Accidents and incidents at or near this airport NTSB records · 30 since 1982, 6 fatal
Cases the NTSB recorded with this as the nearest airport, newest first. Each opens the full report in plain English.
Nearby within 30 nautical miles
The FAA's remarks as written in the airport file
- Existed prior to 1959.
- 48 hour prior permission required for unscheduled part 121 operations with gtr than 30 passenger seats.
- Activate runway end identifier lights runway 07; PAPI runway 07 and 25; medium-intensity runway lights runway 07/25 - the common traffic frequency.
- Noise sens area; use nbaa noise abatement procedure; local ordinance rqr eng runup in dsgnd area on commercial or the FBO (fixed-base operator) ramp from 11:00 pm to 7:00 am and fines.
- Birds on and in the vicinity of airport.
- Self service fuel H24.
- Aircraft must use taxiway A4 for runway 25 full length departure, no runway aces beyond txy A4.
Facts from the FAA's airport file effective October 1, 2026, written out in plain English; weather from the National Weather Service's aviation weather service; registered aircraft from the FAA register as of October 5, 2026; accidents from the NTSB's public database. Owners are shown only when they are an organisation; no person is named. Check the official sources before a flight: this page is for understanding an airport, not for planning one.