Florida Keys Marathon International Airport
MTH · KMTH · Marathon, FL · Non-towered · Print kneeboard
FAA airport diagramView full size ↓ Nearby now
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-04 · night begins 08:31 PM
| Event | Local (EDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 06:29 AM | 10:29Z |
| Sunrise | 06:53 AM | 10:53Z |
| Sunset | 08:07 PM | 00:07Z |
| Evening civil twilight Loggable night begins | 08:31 PM | 00:31Z |
Plan a flight from KMTH
Past 24 hours category · wind · ceiling · visibility trends
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Density altitude today projected curve · departure window · takeoff roll
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Advisories
NOTAMs
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Pilot reports
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Airspace hazards
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Runways
RWY 25LEFT traffic
- Heading
- 251° mag · 247° true
- Dimensions
- 5,008 × 100 ft
- TPA
- 1,000 ft MSL (≈1,000 AGL) · standard
- Surface
- Asphalt
- Lights
- 4-light PAPI (left) (3°)
- CTAF
- 122.975
Enter the left downwind (heading 071°) on the 45° at 1,000 ft MSL (≈1,000 AGL).
More details — RWY 25
- Threshold elev
- 7 ft
- Markings
- nonprecision
- Approach obstacle
- Tree, 65 ft, 2,440 ft from threshold, 150 ft R of centerline — 34:1 slope to clear
- Threshold crossing height
- 26 ft
- TDZ elevation
- 7 ft
- Declared TORA/TODA/ASDA/LDA
- 5,008 / 5,008 / 5,008 / 5,008 ft
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates
| Runway | Length | Your margin |
|---|---|---|
| 07/25 | 5,008 ft |
Prefer one flat page? Full runway details for KMTH → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the KMTH kneeboard →
Comms & NavAids
Communication frequencies
Before taxi
“Marathon”Taxi & takeoff
“Marathon”Also
By procedure & sector (2 frequencies)
| Frequency | Used by |
|---|---|
| 306.9 | KEY WEST RCAG (LOW/HIGH) |
| 323.1 | KEY WEST RCAG (LOW/HIGH) |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
NQX 113.10
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| NQX · Key West | TACAN | 113.10 · 78X | — | r082° / 35.5 NM |
Prefer one flat list? All KMTH frequencies →
Charts & procedures
Lowest minimums here: RNAV (GPS) with vertical guidance · VFR sectional →
Airport info
From the field
Do you run KMTH, or an FBO, flight school, or shop on it? Claim your listing to keep fuel, fees, hours, and services current.
Airport information
- ICAO / IATA
- KMTH / MTH
- Coordinates
- 24.7260, -81.0514
- Elevation
- 7 ft MSL
- Magnetic variation
- 4W
- Sectional chart
- MIAMI
- Airport use
- Public
- Control tower
- No
- Weather station
- ASOS · 135.525 · ☎ 305-743-8373
- ARTCC
- MIAMI (ZMA)
- Flight service (FSS)
- MIAMI · 122.6 · 1-800-WX-BRIEF
- FSS outlet
- RCO → Miami Radio (24)
- NOTAM facility
- MTH
- Attendance
- ALL 0800-1800
- Beacon
- white-green (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- lighted
- FAR 139 class
- I A
- Activated
- 1944/03
- Distance from city
- 3 E
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- ACTVT REIL RWY 07; PAPI RWY 07 & 25; MIRL RWY 07/25 - CTAF. on 122.975 — Chart Supplement ↗
Runway lighting aids — 07: 4-light PAPI (left) · 25: 4-light PAPI (left).
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are under Sun & FAA night in the Weather section.
Services fuel · repairs · oxygen · attendance
- Fuel available
- 100LL, Jet A-1 (additive)
- Bottled oxygen
- HIGH/LOW
- Bulk oxygen
- HIGH/LOW
- Airframe service
- MINOR
- Powerplant service
- MINOR
- Parking
- tiedowns
- Other services
- Agricultural, Instruction, Rental, Aircraft sales
Ownership & management 2 contacts
Remarks FAA · 10 notes
General
- NOISE SENS AREA; USE NBAA NOISE ABATEMENT PROC; LCL ORDINANCE RQR ENG RUNUP IN DSGND AREA ON COML OR FBO RAMP FM 2300-0700 & FINES.
- BIRDS ON & INVOF ARPT.
- FOR CD IF UNA TO CTC ON FSS FREQ, CTC MIAMI ARTCC AT 305-716-1731.
- SELF SVC FUEL H24.
- USCBP USER FEE FAC OPEN THUR-MON 0900-1730. CLSD TO ARRS TUE AND WED EXCEPT ON REQ AND APVL BY USCBP. CTC USCBP AT 305-289-2029. SEE SPL NOTICES - U.S. SPL CUST REQUIREMENT.
- 24 HR PPR FOR ACFT EQUIPPED WITH WEATHER MODIFICATION OR GEOENGINEERING EQPT 305.289.6302.
- ACFT MUST USE TWY A4 FOR RWY 25 FULL LEN DEP, NO RWY ACES BYD TXY A4.
Runways
- PCR VALUE: 200/F/A/X/T
Lighting
- ACTVT REIL RWY 07; PAPI RWY 07 & 25; MIRL RWY 07/25 - CTAF.
Fuel
- AFT HR JET-A FUEL - 305-481-7615.
Embed KMTH weather on your site free widget for schools, clubs & FBOs
Live METAR, flight category, and favored runway for KMTH — paste this into your website's HTML. It updates automatically and stays free.
More widgets — crosswind, E6B, density altitude — on the embed page.
Nearby airports
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Also nearby: FD51 Summerland Key Cove Airport (private) (22 NM) · 7FA1 Sugar Loaf Shores Airport (private) (29 NM) · FA81 Tavernaero Park Airport (private) (33 NM) · X51 Miami Homestead General Aviation Airport (54 NM)
About KMTH
Florida Keys Marathon International Airport (MTH · KMTH) is an airport in Marathon, FL, at 7 ft MSL. It has 1 runway, the longest 5,008 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for KMTH, refreshed from the Aviation Weather Center and FAA NASR.
Does KMTH have a control tower?
No. Florida Keys Marathon International Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at KMTH?
Florida Keys Marathon International Airport has 1 runway; the longest is 5,008 ft. See the Runways section for headings, surface, and lighting.
Where is KMTH?
Florida Keys Marathon International Airport is in Marathon, FL, at an elevation of 7 ft MSL. Coordinates: 24.7260, -81.0514.
Fly out of KMTH often?
Save KMTH as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open KMTH in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.