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GROSSE ILE MUNI - Airport Diagram
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KONZ
ICAO KONZLocal ONZ
GROSSE ILE MUNI
PublicPUB

2 miles S of DETROIT/GROSSE ILE, MI, US
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Status
Operational
Coordinates
42° 05' 57"N 83° 09' 41"W
Elevation
591' MSL
Pattern Alt
1591' MSL
Mag Variation
7°W
Declination
7°W
Fuel
JET A, 100LL
FSS
LANSING (LAN)
Sectional
DETROIT
ARTCC
CLEVELAND (ZOB)
Data Effective
8/6/26-9/3/26
KONZ MVFR
11:15 AM EDT  
Broken 3,500'
Broken 2,800'
10sm
70°F
57°F
29.93"Hg
290° 9kts
Gusts 15kts
AO2
METAR KONZ 231515Z AUTO 29009G15KT 10SM BKN028 BKN035 21/14 A2993 RMK AO2
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KONZ FBOs

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Millennium Flight
UNICOM: 123.0
Phone: (734) 692-6424
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Promote Listing
Grosse Ile Municipal Airport
UNICOM: 123.0
Phone: (734) 675-0155
Other: (734) 692-6424
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Phillips 66
As of 8/13
 100LL JET A JET A (FSII) MOGAS UL94
Self Serve 6.82 6.02
Full Serve
Fuel Notes
Prices include tax
Assistance is available for self-serve 100LL and JET A.
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Weather and Advisory

AWOS-3P 119.675
(734) 692-9686

Common

CTAF 123.0
ACTVT REIL RWY 04 & 22; PAPI RWY 04, 22, 17, & 35; MIRL RWY 04/22 & 17/35 - CTAF.
UNICOM 123.0

Approach

DETROIT APPROACH 134.3

Departure

DETROIT DEPARTURE 134.3

Terminal Area Forecast

KDTW (11nm)
Sun, 8/23 11:12 AM EDT
Sun, 8/23 11:00 AM EDT - Mon, 8/24 2:00 PM EDT
VFR
11:00 AM EDT - 1:00 PM EDT
Scattered 4,000'
Scattered 2,500'
6sm
290° 14kts
Gusts 22kts
VFR
1:00 PM EDT - 9:00 PM EDT
Overcast 25,000'
Broken 12,000'
Broken 4,500'
6sm
310° 13kts
Gusts 20kts
MVFR
4:00 PM EDT - 8:00 PM EDT
Light Showers and Rain
Overcast 3,500'
5sm
Calm
VFR
9:00 PM EDT - 4:00 AM EDT
Overcast 12,000'
Broken 6,000'
6sm
280° 8kts
VFR
4:00 AM EDT - 10:00 AM EDT
Broken 4,000'
Scattered 2,500'
6sm
260° 5kts
VFR
10:00 AM EDT - 2:00 PM EDT
Broken 4,000'
6sm
300° 13kts
Gusts 30kts
TAF KDTW 231512Z 2315/2418 29014G22KT P6SM SCT025 SCT040
   FM231700 31013G20KT P6SM BKN045 BKN120 OVC250
   PROB30 2320/2324 5SM -SHRA OVC035
   FM240100 28008KT P6SM BKN060 OVC120
   FM240800 26005KT P6SM SCT025 BKN040
   FM241400 30013G30KT P6SM BKN040
KONZ
EffectiveExpiresCategoryNOTAM
Domestic
8/20/26
1702Z
10/30/26
1200Z
!ONZ 08/005 ONZ OBST TOWER LGT (ASR 1029785) 420110.00N0831416.00W (5.9NM SW ONZ) 993.8FT (403.9FT AGL) U/S 2608201702-2610301200
6/30/26
1228Z
Runway!ONZ 06/021 ONZ RWY 04 RWY END ID LGT U/S 2606301228-2701062111EST
6/30/26
1228Z
Runway!ONZ 06/020 ONZ RWY 04 PAPI U/S 2606301228-2701062111EST
6/30/26
1226Z
Runway!ONZ 06/019 ONZ RWY 22 RWY END ID LGT U/S 2606301226-2701062111EST
6/24/26
1708Z
9/24/26
2359Z
!ONZ 06/015 ONZ AD AP WILDLIFE HAZARD NEAR MOV AREAS 2606241708-2609242359
6/24/26
1707Z
9/24/26
2359Z
Runway!ONZ 06/014 ONZ RWY 22 PAPI U/S 2606241707-2609242359
6/24/26
1706Z
9/24/26
2359Z
Runway!ONZ 06/013 ONZ RWY 17/35 CLSD 2606241706-2609242359
FDC
8/19/26
1400Z
!FDC 6/6278 ONZ IAP GROSSE ILE MUNI, DETROIT/GROSSE ILE, MI.
VOR-A, AMDT 8...
WHEN LOCAL ALTIMETER SETTING NOT RECEIVED, USE DTW ALTIMETER SETTING AND INCREASE ALL MDAS 40 FEET. ONZ AWOS OUT OF SERVICE.
2608191400-2608261311EST
8/19/26
1400Z
!FDC 6/6277 ONZ IAP GROSSE ILE MUNI, DETROIT/GROSSE ILE, MI.
RNAV (GPS) RWY 22, AMDT 2...
WHEN LOCAL ALTIMETER SETTING NOT RECEIVED, USE DTW ALTIMETER SETTING AND INCREASE ALL MDAS 40 FEET AND LNAV VISIBILITY CAT C/D 1/8 SM. ONZ AWOS OUT OF SERVICE.
2608191400-2608261311EST
8/19/26
1400Z
!FDC 6/6276 ONZ IAP GROSSE ILE MUNI, DETROIT/GROSSE ILE, MI.
RNAV (GPS) RWY 4, ORIG-B...
WHEN LOCAL ALTIMETER SETTING NOT RECEIVED, USE DTW ALTIMETER SETTING AND INCREASE ALL MDAS 40 FEET AND LNAV VISIBILITY CAT C/D 1/8 SM. VDP NA WHEN USING DTW ALTIMETER SETTING. ONZ AWOS OUT OF SERVICE.
2608191400-2608261311EST
8/18/26
2106Z
9/18/26
2106Z
!FDC 6/6122 ONZ IAP GROSSE ILE MUNI, DETROIT/GROSSE ILE, MI.
VOR-A, AMDT 8...
PROCEDURE NA EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS,
CRL DME OUT OF SERVICE. 2608182106-2609182106EST
2/12/26
2000Z
2/21/28
2000Z
!FDC 6/3462 ONZ STAR GROSSE ILE MUNICIPAL AIRPORT, DETROIT/GROSSE
ILE, MI
PETTE TWO ARRIVAL...
HOSSA TRANSITION: MOCA 2800 HOSSA TO PETTE.
QBURT TRANSITION: MOCA 2800 HAZIT TO PETTE.
TORRR TRANSITION: MOCA 2800 HAZIT TO PETTE.
WWODD TRANSITION: MOCA 2800 HAZIT TO PETTE.
ALL OTHER DATA REMAINS AS PUBLISHED.
2602122000-2802212000
12/17/25
1445Z
!FDC 5/0302 ONZ IAP GROSSE ILE MUNI, DETROIT/GROSSE ILE, MI.
VOR-A, AMDT 8...
PROCEDURE NA.
2512171445-2712161445EST
No
MON-FRI 0800-1800
SAT-SUN PRIOR ARNGMT
TOWNSHIP OF GROSSE ILE
PO BOX 129 PO BOX 129
GROSSE ILE, MI 48138
Phone: 734-675-0155
JANEL MACNEE
P.O. BOX 129 PO BOX 129
GROSSE ILE, MI 48138
Phone: 734-675-0155
LANSING FSS (LAN)
Toll Free: 1-800-WX-BRIEF
ONZ
--
ACTVT REIL RWY 04 & 22; PAPI RWY 04, 22, 17, & 35; MIRL RWY 04/22 & 17/35 - CTAF.
N/A
Yes - Lighted
Yes
No
Hanger, Tie-Down
NOT a Landing Rights Airport
NOT an Airport of Entry
Major
Major
None
None
Charter Service
Pilot Instruction
Aircraft Rental

Runway 04/22

4846 ft. x 100 ft.
ASPH  
Good 
NONE 
MED 
 
66,000lbs 
83,000lbs 
105,000lbs 
-- 
  Runway 04 Runway 22
True Heading 30°210°
Traffic Pattern Right Left
Markings NPI NPI
Markings Condition GOOD GOOD
Latitude 42° 05' 36"N 42° 06' 17"N
Longitude 83° 09' 45"W 83° 09' 12"W
Elevation 577' 589'
Threshold Crossing Height 40 ft. AGL 40 ft. AGL
Visual Glide Path Angle 3.04° 3.04°
Visual Slope Indicator P4L P4L
Approach Lights
Centerline Lights No No
Runway End Identifier Lights Yes Yes

Runway 17/35

4424 ft. x 75 ft.
CONC  
Poor 
NONE 
MED 
 
40,000lbs 
55,000lbs 
90,000lbs 
-- 
  Runway 17 Runway 35
True Heading 167°347°
Traffic Pattern Left Right
Markings BSC BSC
Markings Condition FAIR FAIR
Latitude 42° 06' 18"N 42° 05' 35"N
Longitude 83° 10' 02"W 83° 09' 49"W
Elevation 581' 578'
Threshold Crossing Height 26 ft. AGL 20 ft. AGL
Visual Glide Path Angle 3° 3°
Visual Slope Indicator P4L P4L
Approach Lights
Centerline Lights No No
Runway End Identifier Lights No No

Runway H1

25 ft. x 25 ft.
 
CONC 
NONE 
 
 
-- 
-- 
-- 
-- 
  Runway H1 Runway
True Heading Not ListedNot Listed
Traffic Pattern
Markings
Markings Condition
Latitude 42° 06' 19"N N/A
Longitude 83° 09' 28"W N/A
Elevation 595' --
Threshold Crossing Height -- --
Visual Glide Path Angle -- --
Visual Slope Indicator -- --
Approach Lights
Centerline Lights
Runway End Identifier Lights

Runway H2

25 ft. x 25 ft.
 
CONC 
NONE 
 
 
-- 
-- 
-- 
-- 
  Runway H2 Runway
True Heading Not ListedNot Listed
Traffic Pattern
Markings
Markings Condition
Latitude 42° 06' 19"N N/A
Longitude 83° 09' 27"W N/A
Elevation 594' --
Threshold Crossing Height -- --
Visual Glide Path Angle -- --
Visual Slope Indicator -- --
Approach Lights
Centerline Lights
Runway End Identifier Lights
A110-1BIRDS & DEER ON & INVOF ARPT.
A110-2ULTRALIGHT & PWRD PRCHT ACT INVOF ARPT.
A110-4FOR CD CTC DETROIT APCH AT 734-955-1404.
A26ARPT CLSD TO ACR OPS GTR THAN 30 PAX SEATS EXC PPR CALL AMGR.
A33-17/35_CONDEXTSV PEELING & CRACKING - FOD HAZ.
A57-22APCH RATIO 20:1 TO DTHR.
A81-APTACTVT REIL RWY 04 & 22; PAPI RWY 04, 22, 17, & 35; MIRL RWY 04/22 & 17/35 - CTAF.
GROSSE ILE MUNI (ICAO: KONZ, IATA: ONZ) is a public airport located in DETROIT/GROSSE ILE, MI, US.