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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
2/19/26-3/19/26
KONZ MVFR
8:55 PM EST  
Mist
Overcast 1,100'
3sm
32°F
32°F
30.19"Hg
140° 1kts
AO2 PRESRR
METAR KONZ 040155Z AUTO 14001KT 3SM BR OVC011 00/00 A3019 RMK AO2 PRESRR
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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)
Tue, 3/3 6:23 PM EST
Tue, 3/3 7:00 PM EST - Thu, 3/5 1:00 AM EST
MVFR
7:00 PM EST - 11:00 PM EST
Haze
Overcast 1,500'
5sm
VRB° 4kts
VFR
11:00 PM EST - 3:00 AM EST
Scattered 25,000'
Scattered 2,000'
6sm
VRB° 3kts
IFR
3:00 AM EST - 5:00 AM EST
Mist
Scattered 25,000'
Scattered 200'
2sm
VRB° 2kts
LIFR
5:00 AM EST - 11:00 AM EST
Fog
Obscured
0.5sm
VRB° 2kts
MVFR
11:00 AM EST - 1:00 PM EST
Mist
Broken 1,000'
Scattered 500'
4sm
100° 5kts
VFR
1:00 PM EST - 9:00 PM EST
Broken 25,000'
Scattered 1,500'
6sm
130° 5kts
MVFR
9:00 PM EST - 1:00 AM EST
Light Drizzle and Mist
Overcast 1,000'
4sm
090° 5kts
TAF KDTW 032323Z 0400/0506 VRB04KT 5SM HZ OVC015
   FM040400 VRB03KT P6SM SCT020 SCT250
   FM040800 VRB02KT 2SM BR SCT002 SCT250
   FM041000 VRB02KT 1/2SM FG VV002
   FM041600 10005KT 4SM BR SCT005 BKN010
   FM041800 13005KT P6SM SCT015 BKN250
   FM050200 09005KT 4SM -DZ BR OVC010
KONZ
EffectiveExpiresCategoryNOTAM
Domestic
2/12/26
1306Z
3/5/26
2359Z
!ONZ 02/020 ONZ OBST TOWER LGT (ASR 1001046) 420944.00N0831220.00W (4.3NM NNW ONZ) 931.8FT (337.9FT AGL) U/S 2602121306-2603052359
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.