Florida Keys Marathon International Airport
Daylight today(Jul 21, 2026, local time)
About 13h 27m of daylight. Civil twilight (dawn/dusk) approximates the FAA definition of night for logging and currency. Times are computed and approximate — verify with official sources.
About Florida Keys Marathon International Airport
The Florida Keys Marathon International Airport is a public airport located along the Overseas Highway (US1) in Marathon, in Monroe County, Florida, United States. The airport covers 197 acres (80 ha) and has one runway.
Summary from Wikipedia, photo via Wikimedia Commons, licensed under CC BY-SA.
Live weather
KMTHLive departures & arrivals
Flight data by AeroDataBox. Times are estimates — not for navigation; confirm with the airline.
Where you can fly from here
Current scheduled routes & daily frequency by AeroDataBox. Approximate — confirm bookable schedules with the airline.
Map
Runway centrelines, navaids and overlapping airspace. Tiles © OpenStreetMap contributors. Reference only — not for navigation.
Runways (1)
| Runway | Length | Width | Surface | Lighting | Status |
|---|---|---|---|---|---|
| 07 / 25 | 5,008 ft / 1,526 m | 100 ft | Asp | Lighted | Open |
Radio frequencies (4)
| Type | Description | Frequency |
|---|---|---|
| ASOS | ASOS | 135.525 MHz |
| CNTR | MIAMI CNTR | 133.500 MHz |
| RDO | MIAMI RDO | 122.600 MHz |
| UNIC | CTAF/UNICOM | 122.800 MHz |
Instrument procedures & charts
Airport diagram (1)
Instrument approaches (2)
Takeoff & alternate minimums (2)
Charts published by the FAA (public domain) and updated each 28-day cycle. Always fly the current, official chart. Full charts page.
Tall obstacles nearby
| Obstacle | Height AGL | Top (MSL) | Lit |
|---|---|---|---|
| WGMX-FM (Marathon) | 276 ft | 26 ft | — |
Tallest obstacles within ~10 nm. Data via OpenAIP. Reference only — consult official charts.
Nearby airports
Great-circle distance and true bearing from Florida Keys Marathon International Airport.
Frequently asked questions
What is the ICAO code for Florida Keys Marathon International Airport?
The ICAO code for Florida Keys Marathon International Airport is KMTH, and its IATA code is MTH.
Where is Florida Keys Marathon International Airport located?
Florida Keys Marathon International Airport is medium airport located in Marathon, United States, at an elevation of 5 ft (2 m).
How many runways does Florida Keys Marathon International Airport have?
Florida Keys Marathon International Airport has 1 runway, the longest being 5,008 ft / 1,526 m.
What time zone is Florida Keys Marathon International Airport in?
Florida Keys Marathon International Airport is in the America/New York time zone (UTC-04:00).
What is the magnetic variation at Florida Keys Marathon International Airport?
The magnetic variation (declination) at Florida Keys Marathon International Airport is approximately 6.7° W, per the World Magnetic Model. Variation changes slowly over time — always use the current value charted for navigation.
What airports are near Florida Keys Marathon International Airport?
The nearest airport to Florida Keys Marathon International Airport is Fishermen Field (US-12860), about 13.7 nm to the ene, followed by Big Pine Sands STOLGround and Matecumbe Key Airport.
Is the information on this page suitable for flight planning?
No. Florida Keys Marathon International Airport data here is for reference and training only — not for navigation. Always consult official sources and current charts before any flight.