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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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LiveATC.net: Live Air Traffic - From Their Headsets to You
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
2/19/26-3/19/26
KONZ VFR
9:15 AM EDT  
Broken 11,000'
10sm
37°F
27°F
29.88"Hg
090° 12kts
Gusts 17kts
AO2 PRESFR
METAR KONZ 151315Z AUTO 09012G17KT 10SM BKN110 03/M03 A2988 RMK AO2 PRESFR
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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
No Rating Available
0 Reviews (Read | Sign In To Write)
Phillips 66
As of 2/27
 100LL JET A JET A (FSII) MOGAS UL94
Self Serve 5.72 4.80
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-3 119.675
(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, 3/15 7:20 AM EDT
Sun, 3/15 8:00 AM EDT - Mon, 3/16 2:00 PM EDT
VFR
8:00 AM EDT - 11:00 AM EDT
Overcast 7,000'
6sm
080° 13kts
Gusts 25kts
VFR
11:00 AM EDT - 1:00 PM EDT
Overcast 10,000'
6sm
110° 15kts
Gusts 29kts
VFR
1:00 PM EDT - 5:00 PM EDT
Broken 15,000'
Scattered 4,500'
6sm
140° 20kts
Gusts 34kts
VFR
5:00 PM EDT - 12:00 AM EDT
Broken 15,000'
Broken 6,000'
6sm
180° 24kts
Gusts 39kts
VFR
12:00 AM EDT - 6:00 AM EDT
Light Showers and Rain
Overcast 6,000'
Broken 4,000'
6sm
170° 18kts
Gusts 34kts
MVFR
2:00 AM EDT - 5:00 AM EDT
Thunderstorm and Rain and Mist
Overcast 4,000'
3sm
Calm
VFR
6:00 AM EDT - 2:00 PM EDT
Overcast 3,500'
6sm
220° 20kts
Gusts 36kts
TAF KDTW 151120Z 1512/1618 08013G25KT P6SM OVC070
   FM151500 11015G29KT P6SM OVC100
   FM151700 14020G34KT P6SM SCT045 BKN150
   FM152100 18024G39KT P6SM BKN060 BKN150
   FM160400 17018G34KT P6SM -SHRA BKN040 OVC060
   PROB30 1606/1609 3SM TSRA BR OVC040CB
   FM161000 22020G36KT P6SM OVC035
KONZ
EffectiveExpiresCategoryNOTAM
Domestic
3/4/26
2011Z
3/31/26
2359Z
!ONZ 03/001 ONZ OBST TOWER LGT (ASR 1001046) 420944.00N0831220.00W (4.3NM NNW ONZ) 931.8FT (337.9FT AGL) U/S 2603042011-2603312359
2/8/26
0336Z
3/25/26
0335Z
!ONZ 02/016 ONZ OBST TOWER LGT (ASR 1006927) 420639.00N0831152.00W (1.8NM WNW ONZ) 866.1FT (291.0FT AGL) U/S 2602080336-2603250335
2/5/26
2304Z
3/22/26
2303Z
!ONZ 02/011 ONZ OBST TOWER LGT (ASR 1006094) 421005.00N0831254.00W (4.8NM NNW ONZ) 1305.1FT (710.0FT AGL) U/S 2602052304-2603222303
12/24/25
2111Z
Runway!ONZ 12/030 ONZ RWY 04 RWY END ID LGT U/S 2512242111-2606302111EST
12/24/25
2111Z
Runway!ONZ 12/029 ONZ RWY 04 PAPI U/S 2512242111-2606302111EST
12/24/25
2111Z
Runway!ONZ 12/028 ONZ RWY 22 RWY END ID LGT U/S 2512242111-2606302111EST
12/19/25
1447Z
6/30/26
2359Z
Runway!ONZ 12/036 ONZ RWY 17/35 CLSD 2512191447-2606302359
12/19/25
1447Z
6/30/26
2359Z
Runway!ONZ 12/035 ONZ RWY 22 PAPI U/S 2512191447-2606302359
12/19/25
1446Z
6/30/26
2359Z
!ONZ 12/034 ONZ AD AP WILDLIFE HAZARD NEAR MOV AREAS 2512191446-2606302359
FDC
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
12/2/25
1348Z
!FDC 5/3140 ONZ IAP GROSSE ILE MUNI, DETROIT/GROSSE ILE, MI.
RNAV (GPS) RWY 4, ORIG-B...
CHANGE MISSED APPROACH INSTRUCTIONS TO READ: CLIMB TO 2500 DIRECT UFDIV AND HOLD. TEMPORARY CRANE 1449FT MSL 11.3NM NE OF RWY 22 (2024-AGL-8166-OE).
2512021348-2607141348EST
12/2/25
1348Z
!FDC 5/3138 ONZ IAP GROSSE ILE MUNI, DETROIT/GROSSE ILE, MI.
RNAV (GPS) RWY 22, AMDT 2...
HOLD IN LIEU OF PT (UFDIV IF/IAF) MINIMUM ALTITUDE 2500. INTERMEDIATE FIX CROSSING ALTITUDE AT UFDIV 2500. INITIAL SEGMENT YEGHI (IAF) TO UFDIV (IF/IAF) MINIMUM ALTITUDE 2500. TEMPORARY CRANE 1449FT MSL 11.3NM NE OF RWY 22 (2024-AGL-8166-OE).
2512021348-2607141348EST
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.