Grosse Ile Municipal
ONZ · KONZ · Detroit/Grosse Ile, Michigan · Wayne County · map
Grosse Ile Municipal is a public-use airport, 2 miles south of Detroit/Grosse Ile, Michigan, 590 feet above sea level. It has 4 runways; the longest, 04/22, is 4,846 feet of asphalt. It has fuel (100LL avgas, Jet A) and about 75 general-aviation aircraft based on the field by the FAA's count. The FAA counts about 16,000 takeoffs and landings a year.
Quick answers answers refresh every morning
What is the airport code for Grosse Ile Municipal?
Its FAA code is ONZ, and its ICAO code is KONZ.
Where is Grosse Ile Municipal?
It is 2 miles south of Detroit/Grosse Ile, Michigan, 590 feet above sea level.
How long is the longest runway at Grosse Ile Municipal?
The longest of its 4 runways, 04/22, is 4,846 feet long.
Does Grosse Ile Municipal have a control tower?
No, it has no control tower.
What fuel can you buy at Grosse Ile Municipal?
The FAA's airport file lists 100LL avgas, Jet A.
Are there flight schools at Grosse Ile Municipal?
One flight school, flying club or college flight programme is based within about 15 miles of it: Tuskegee Airmen National Historical Museum. Compare them
Where are the nearest FAA examiners to Grosse Ile Municipal?
15 pilot examiners and 20 aviation medical examiners work within 50 nautical miles. See them by name
Weather and planning now, the forecast, warnings, pilot reports, winds aloft, restrictions
Fetching the weather now, the forecast, the warnings in force, pilot reports and the winds aloft for Grosse Ile Municipal…
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.
The airport facts, runways, radio, fuel and services, the FAA's remarks
The airport
- Codes
- FAA ONZ · ICAO KONZ
- Kind
- Airport · open to the public · publicly owned
- Elevation
- 590 feet above sea level
- Control tower
- No control tower
- Attended
- Monday to Friday, 8:00 am to 6:00 pm; weekends, prior arngmt
- Lights
- runway lights see the remarks below; beacon sunset to sunrise
- Fuel and services
- 100LL avgas, Jet A; the services card below
- On the chart
- Detroit sectional
- Magnetic variation
- 7W
- In the FAA's files since
- May 1941
Runways 4
For understanding the field, not for navigation.
| Runway | Length × width | Surface | Lights |
|---|---|---|---|
| 04/22 | 4,846 × 100 ft | Asphalt, good | Medium-intensity lights |
| 17/35 | 4,424 × 75 ft | Concrete, poor | Medium-intensity lights |
| H1 | 25 × 25 ft | Concrete | |
| H2 | 25 × 25 ft | Concrete |
- Runway 04: PAPI, four lights on the left, right-hand traffic pattern, tree 37 ft high 790 ft from the end
- Runway 22: PAPI, four lights on the left, threshold displaced 428 ft, trees 65 ft high 1,010 ft from the end
- Runway 17: PAPI, four lights on the left, threshold displaced 672 ft, trees 80 ft high 1,180 ft from the end
- Runway 35: PAPI, four lights on the left, right-hand traffic pattern
Radio frequencies
| Common traffic advisory (CTAF) · UNICOM | 123.0 | |
| Approach and departure | 134.3 | |
| Onz and aWOS-3P | 119.675 |
Automated weather (AWOS-3P), by phone 734-692-9686.
Fuel and services as reported to the FAA
- Fuel
- 100LL avgas, Jet A
- Repairs
- airframe and engine: major repairs
- Parking
- hangars, tie-downs
- Also here
- charter flights, flight instruction, aircraft rental
Other fields with jet fuel nearby: Detroit Metro Wayne County (11 nm northwest), Willow Run Airport (19 nm northwest), Coleman A Young Municipal (20 nm north).
The FAA's file records what is sold and done at the field, as the airport manager reports it, not who sells it or the price; fuel sellers (FBOs) are not named in any public file. Airports selling jet fuel in Michigan · avgas.
The FAA's remarks as written in the airport file, spelled out
- Birds and deer on and in the vicinity of airport.
- Activate runway end identifier lights runway 04 and 22; PAPI runway 04, 22, 17, and 35; medium-intensity runway lights runway 04/22 and 17/35 - the common traffic frequency.
- Approach ratio 20:1 to dthr.
- Extensive peeling and cracking - fod haz.
- Ultralight and pwrd prcht act in the vicinity of airport.
Flights and activity in the air now, the airlines, based aircraft, takeoffs and landings
Activity now checking the volunteer receiver network…
Within ten miles
- Looking…
Arrivals and departures, last hour
- Looking…
From the volunteer receiver network, a few minutes behind at most; aircraft whose owners asked the FAA not to be displayed are left out; no person is named. Open the live map here.
Based aircraft as counted for the FAA, fiscal year 2024
Based aircraft, as a table
| aircraft | |
|---|---|
| single-engine | 63 |
| multi-engine | 7 |
| jets | 1 |
| helicopters | 4 |
The FAA's count is the general-aviation aircraft kept on the field (singles, twins, business jets, helicopters) from its Terminal Area Forecast, the latest year with an actual count; airline fleets are never counted as based anywhere, so a big airline airport shows a small number. The register section below shows how many aircraft are registered to owners in town, a different measure again.
Takeoffs and landings a year about 16,000, the FAA's fiscal year 2024 (October 2023 to September 2024)
Takeoffs and landings, as a table
| a year | |
|---|---|
| general aviation, travelling | 6,000 |
| general aviation, local | 10,000 |
Local flights stay in the traffic pattern or nearby, often practice; travelling flights arrive from or leave for somewhere else. Counts at airports without a tower are the FAA's estimates. How this compares nationally: Airports by the numbers.
Who flies and works here aircraft registered in town, the companies, the examiners nearby
Aircraft registered in Detroit/Grosse Ile from the FAA register
No aircraft on the register list Detroit/Grosse Ile, MI as the owner's town.
Who works here from the FAA's certificate lists and the register
Flight schools, flying clubs and college flight programmes based within about 15 miles:
- Tuskegee Airmen National Historical Museum 9 aircraft · Detroit, 13 miles away The Tuskegee Airmen National Historical Museum is a museum and educational organization in Detroit, Michigan dedicated to preserving the legacy of the Tuskegee Airmen and providing aviation education programs.
Companies in the same town as this airport, and schools within about 15 miles of it (each placed at the main public airport of its town, or at the town's centre); not every one of them works from this field. All operators · all repair stations · all flight schools · all FBOs.
Examiners and inspectors nearby designated by the FAA · within 50 nautical miles
15 pilot examiners (the FAA's designated pilot examiners, who give the practical tests for pilot certificates) are based within 50 nautical miles: 14 for private pilot, 14 for commercial and instrument, 5 for airline transport pilot, 10 for flight instructor, 4 for sport pilot, 1 for type ratings; 12 for airplanes, 6 for multi-engine airplanes, 2 for helicopters. Also nearby: 2 sport aviation examiners, 20 aviation medical examiners, 5 mechanic examiners, 1 airworthiness representative (maintenance), 5 engineering representatives, 1 training center evaluator, 17 aircrew program designees, 1 training center examiner.
- Marci Haengel private pilot, commercial and instrument, flight instructor, instructor renewals, military competency, ground instructor, foreign pilot certificates; airplanes · Van Buren Township, MI (15 nm) · (734) 262-9292 · [email protected]
- Sara Diane Bey private pilot, commercial and instrument, flight instructor, instrument instructor, instructor renewals, military competency, ground instructor, foreign pilot certificates; airplanes · East Michigan FSDO-GL-23/ EMI FSDO · Van Buren Charter Township, MI (15 nm) · (586) 201-9018 · [email protected]
- Edmond William Verville private pilot, commercial and instrument, airline transport pilot, flight instructor, instrument instructor; airplanes, multi-engine airplanes · ATP Flight Training Center · Yipsilanti, MI (22 nm) · (269) 207-5864 · [email protected]
- Mark Richard Handren commercial and instrument, airline transport pilot, type ratings, private pilot (proficiency), instructor renewals, military competency, ground instructor, foreign pilot certificates; multi-engine airplanes · Ypsilanti, MI (22 nm) · (423) 312-4916 · [email protected]
- Amanda Kirsten Roggow private pilot, commercial and instrument, flight instructor, instrument instructor, instructor renewals, ground instructor; airplanes · Ann Arbor Municipal Airport · Ann Arbor, MI (27 nm) · (847) 400-4630 · [email protected]
- Clint Edward White private pilot, commercial and instrument, instructor renewals, military competency, ground instructor, foreign pilot certificates; airplanes · Solo Aviation - ARB · Ann Arbor, MI (27 nm) · (404) 964-4121 · [email protected]
- Gerald Leigh Stanley private pilot, commercial and instrument, airline transport pilot, flight instructor, instrument instructor, sport pilot, instructor renewals, military competency, ground instructor, foreign pilot certificates; airplanes, multi-engine airplanes · Oakland - Troy Airport · Troy, MI (27 nm) · (248) 613-9713 · [email protected]
- Spencer Norris private pilot, commercial pilot, instructor renewals, ground instructor; helicopters · Toledo Suburban Airport · Ottawa Lake, MI (32 nm) · (419) 367-0411 · [email protected]
All 67 nearby, by kind, with contact details
What each kind does
- DPE: Designated Pilot Examiner: gives the practical tests (checkrides) for pilot certificates and ratings.
- SAE: Sport Aviation Examiner: gives the tests for sport pilot certificates and light-sport aircraft.
- AME: Aviation Medical Examiner: a doctor who issues the medical certificates pilots must hold.
- DME: Designated Mechanic Examiner: tests candidates for the mechanic certificate (airframe and powerplant).
- DAR-T: Designated Airworthiness Representative, maintenance: issues airworthiness certificates and approvals for aircraft in service.
- DER-T: Designated Engineering Representative: approves engineering data for repairs and alterations on the FAA's behalf.
- TCE: Training Center Evaluator: gives tests at a simulator training center.
- APD: Aircrew Program Designee: an airline's own check pilot who gives the FAA's tests to the airline's pilots.
- DCTO-E: Designee at a certificated training organisation.
Designees are listed with the name and contact details the FAA publishes for them on its designee locator (read October 10, 2026): the FAA lists them so that pilots, mechanics and companies can find them. Private individuals are not named, the site's policy at this time. A designee who would rather not appear here can ask us through the contact address on the About page. Each designee is placed at the main public airport of the town the FAA lists (or the nearest one to its zip code), so "nearby" means the town, not an exact address. All examiners by state.
Safety record the NTSB's cases at or near this airport
Accidents and incidents at or near this airport NTSB records · 6 since 1982, 1 fatal
Cases the NTSB recorded with this as the nearest airport, newest first. Each opens the full report in plain English. The country as a whole: Where accidents happen.
Nearby within 30 nautical miles
Connections how this airport links to the rest of the register
- NTSB accidents and incidents at or near this airport 6 since 1982 · 1 fatal
- Accidents and incidents in Michigan 2,103 since 1982 · 226 in the last ten years
- Tuskegee Airmen National Historical Museum 9 aircraft · flight school
- Nearby landing places within 30 nautical miles 8 airports, heliports and seaplane bases
- Public-use airports in Michigan 220 landing places
- Michigan 7,223 aircraft registered
The whole map of how records connect · these connections as data: /graph/airport/ONZ.json.
Facts from the FAA's airport file effective October 29, 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 28, 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.