Grosse Ile Municipal (KONZ), Michigan
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Grosse Ile Municipal (KONZ) is a non-towered public airport in Detroit / Grosse Ile, Michigan, serving general aviation and business traffic near the Detroit Metro area. The field offers two paved runways, with fuel available in both 100LL and Jet A, and attends scheduled hours on weekdays with prior arrangement required on weekends. Customs clearance is not available onsite; the nearest customs airport is Detroit Metro Wayne County (KDTW), about 11 nautical miles away.
Runways
Grosse Ile Municipal has two paved runways. The longest, 04/22, is 4,846 ft long and 100 ft wide, with an asphalt surface.
Runway geometry from published threshold coordinates. Not for navigation.
Runways are listed longest first. Helipads and surfaces under 500 ft are excluded.
Source: FAA Form 5010.
Fuel and airfield services
Grosse Ile Municipal has Jet A and 100LL available on the field. The airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Grosse Ile Municipal does not clear customs. The nearest port of entry is Detroit Metro Wayne County (KDTW), 11 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Grosse Ile Municipal recorded 217 business aviation movements in 2025. Traffic peaks in June. Business aviation traffic at KONZ concentrates in the late spring and summer months, peaking in June, with the lowest activity recorded in December.
Business jet movements, FAA TFMSC count. Peak month June, 31 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Grosse Ile Municipal averages 5.2 snow days in February.
Weather station is 6.6 NM from the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Grosse Ile Municipal has published operating constraints in four categories: access, runway notes, environmental and other notes.
Ultralight and powered parachute activity occurs in the vicinity of the airport.
For clearance delivery, contact Detroit Approach.
REIL for runway 04 and 22, and PAPI for runways 04, 22, 17, and 35, are pilot-activated. MIRL for runway 04/22 and 17/35 is also pilot-activated, via CTAF.
The approach ratio is 20:1 to the displaced threshold.
Birds and deer are present on and in the vicinity of the airport.
Extensive peeling and cracking of the pavement presents a foreign object debris hazard.
Source: FAA Chart Supplement.
Nearby airfields
Grosse Ile Municipal has five airfields within 20 NM. The closest is Detroit Metro Wayne County (KDTW), 10.92 NM northwest.
Part of the Detroit and Pontiac area.
Source: Skystar calculation from official coordinates.
Skystar at KONZ
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$1,200.00 catering order at KONZ.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
It does not move with the size of the order.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
Is customs clearance available at KONZ?
Grosse Ile Municipal does not offer onsite customs clearance. The nearest customs-equipped airport is Detroit Metro Wayne County (KDTW), located approximately 11 nautical miles away. Flights requiring customs processing should plan to clear at that facility instead of KONZ. Dispatchers should factor in the short repositioning distance when arranging international arrivals.
What runways are available at Grosse Ile Municipal?
Grosse Ile Municipal (KONZ) has two paved runways suitable for fixed-wing traffic. Runway 04/22 is asphalt, measuring 4,846 feet by 100 feet, while runway 17/35 is concrete, at 4,424 feet by 75 feet. The airport also has two short concrete helipads. Runway lighting includes REIL on runway 04/22 and PAPI on all four runway ends, activated via CTAF.
What is the attendance schedule at KONZ?
KONZ operates on a published attendance schedule of Monday through Friday, 0800 to 1800 local time. Weekend service at Grosse Ile Municipal requires prior arrangement rather than being available on a walk-up basis. Dispatchers planning weekend operations should coordinate ahead of arrival to confirm availability. This schedule applies to the airport generally rather than to any single service.</answer>
Does Grosse Ile Municipal have any known pavement or surface conditions to note?
Grosse Ile Municipal (KONZ) has a recorded surface condition remark noting extensive peeling and cracking, flagged as a foreign object debris hazard. This applies to pavement at the field and should be considered during preflight planning and taxi operations. Crews should remain alert for loose surface material. No further detail on which specific runway or apron area is specified in the operational remarks.