Florida Keys Marathon International Airport

MTH · KMTH · Marathon, FL · 5 ft elevation · var 4W · Non-towered

Overview Weather Runways Comms & NavAids Charts Services & info

Airport information

ICAO / IATA: KMTH / MTH
Coordinates: 24.7260, -81.0514
Elevation: 5 ft MSL
Magnetic variation: 4W
Sectional chart: MIAMI
Airport use: Public
Control tower: No
ARTCC: MIAMI (ZMA)
Flight service (FSS): MIAMI
NOTAM facility: MTH
Attendance: ALL 0800-1800
Beacon: white-green (SS-SR)
Segmented circle: Yes
Wind indicator: lighted
Activated: 1944/03
Distance from city: 3 E

Weather

METAR observed

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TAF forecast

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Sun & FAA night 2026-06-21

Event	Local (EDT)	UTC
Morning civil twilight Loggable night ends	06:10 AM	10:10Z
Sunrise	06:36 AM	10:36Z
Sunset	08:16 PM	00:16Z
Evening civil twilight Loggable night begins	08:42 PM	00:42Z

Loggable night (§1.1)

08:42 PM → 06:10 AM

Night currency (§61.57)

09:16 PM → 05:36 AM

Plan a flight from KMTH

Destination (ICAO)

TAS (kt)Burn (gph)Reserve (hr)Wind from (°)Wind (kt)

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 in the live weather panel above.

Traffic pattern

Landing runway

LEFT traffic

Landing: Rwy 07 · 071°
Pattern: left (turns left)
TPA: 1,000 ft MSL (≈1,000 AGL)
CTAF: 122.975

Enter the left downwind for Rwy 07 at 1,000 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).

Runway 07/25

5,008 ft × 100 ft · Asphalt (Excellent)

Edge lights: Med. Weight bearing: Single wheel 62k, Double wheel 100k, Dual tandem 182k.

Heading: 071° mag · 67° true
Markings: nonprecision
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Left
Approach obstacle: Tree, 40 ft, 1,700 ft from threshold, 80 ft L of centerline — 37:1 slope to clear

Heading: 251° mag · 247° true
Markings: nonprecision
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Left
Approach obstacle: Tree, 65 ft, 2,440 ft from threshold, 150 ft R of centerline — 34:1 slope to clear

Will it fit? Your aircraft's required runway length (from the POH) — checked against every runway here

ft · ≥1.5× comfortable, under 1.25× tight · saved across airports

Runway	Length	Your margin
07/25	5,008 ft

Communication frequencies

Service	Frequency	Notes
ASOS	135.525
CNTR	133.5	MIAMI CNTR
RDO	122.6	MIAMI RDO
UNIC	122.8	CTAF/UNICOM

Nearby navigation aids

NavAid	Type	Freq	Radial / Dist magnetic
NQX · Key West	TACAN	113.10	r078° / 35.5 NM

Airport diagram

Open PDF ↗

Preview diagram

Procedures at a glance

Lowest mins: RNAV (GPS) · vertical guidance Takeoff mins / ODP ↗ Non-std alternate mins ↗

Approaches2

Minimums & Hot Spots

Chart Supplement FAA A/FD

Open PDF ↗

Preview Chart Supplement

VFR sectional

Open KMTH on the VFR sectional (SkyVector) ↗

Services

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

Owner

MONROE COUNTY

500 WHITEHEAD ST, KEY WEST, FL

305-296-5439

Manager

MICHAEL LEGERE

9400 OVERSEAS HWY SUITE 200, MARATHON, FL

305-289-6302

Remarks FAA

EXISTED PRIOR TO 1959.
48 HR PPR FOR UNSKED PART 121 OPS WITH GTR THAN 30 PAX SEATS.
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.
ACTVT REIL RWY 07; PAPI RWY 07 & 25; MIRL RWY 07/25 - CTAF.
AFT HR JET-A FUEL - 305-481-7615.
PCR VALUE: 200/F/A/X/T

Nearby airports

FD51 · Summerland Key Cove AirportPrivate (22 NM)7FA1 · Sugar Loaf Shores AirportPrivate (29 NM)FA81 · Tavernaero Park AirportPrivate (33 NM)KNQX · Naval Air Station Key West/Boca Chica FieldPrivate (36 NM)KEYW · Key West International Airport (40 NM)X51 · Miami Homestead General Aviation Airport (54 NM)

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.

About KMTH

Florida Keys Marathon International Airport (MTH · KMTH) is an airport in Marathon, FL, at 5 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 on the Comms & NavAids tab.

What is the longest runway at KMTH?

Florida Keys Marathon International Airport has 1 runway; the longest is 5,008 ft. See the Runways tab for headings, surface, and lighting.

Where is KMTH?

Florida Keys Marathon International Airport is in Marathon, FL, at an elevation of 5 ft MSL. Coordinates: 24.7260, -81.0514.

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