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GROSSE ILE MUNI - Airport Diagram
LiveATC.net: Live Air Traffic - From Their Headsets to You

KONZ
GROSSE ILE MUNI
PublicPUB

2 miles S of DETROIT/GROSSE ILE, MI
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LiveATC.net: Live Air Traffic - From Their Headsets to You
Operational
42° 05' 57"N 83° 09' 41"W
590' MSL
1590' MSL
07W
JET A, 100LL
LANSING (LAN)
DETROIT
CLEVELAND (ZOB)
12/25/25-1/22/26
KONZ VFR
2:55 PM EST  
Clear
10sm
46°F
37°F
29.94"Hg
130° 6kts
AO2
METAR KONZ 081955Z AUTO 13006KT 10SM CLR 08/03 A2994 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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Grosse Ile Municipal Airport
UNICOM: 123.0
Phone: (734) 675-0155
Other: (734) 692-6424
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Phillips 66
As of 12/23/2025
 100LL JET A JET A (FSII) MOGAS UL94
Self Serve 5.53 4.80
Full Serve 5.53 4.80
Fuel Notes
Prices include tax
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Terminal Area Forecast

KDTW (11nm)
Thu, 1/8 12:20 PM EST
Thu, 1/8 1:00 PM EST - Fri, 1/9 7:00 PM EST
VFR
1:00 PM EST - 8:00 PM EST
Broken 20,000'
Scattered 10,000'
6sm
170° 10kts
VFR
8:00 PM EST - 12:00 AM EST
Overcast 4,500'
6sm
150° 13kts
MVFR
12:00 AM EST - 2:00 AM EST
Light Showers and Rain
Overcast 3,500'
Scattered 2,500'
5sm
160° 14kts
Gusts 23kts
MVFR
2:00 AM EST - 4:00 AM EST
Light Showers and Rain
Overcast 2,500'
Scattered 1,500'
4sm
180° 16kts
Gusts 25kts
MVFR
4:00 AM EST - 9:00 AM EST
Light Showers and Rain
Overcast 1,800'
4sm
190° 16kts
Gusts 26kts
MVFR
Temporary 9:00 AM EST - 12:00 PM EST
Light Showers and Rain
Overcast 2,000'
5sm
Calm
MVFR
9:00 AM EST - 4:00 PM EST
Broken 2,500'
Scattered 1,500'
6sm
210° 21kts
Gusts 33kts
VFR
4:00 PM EST - 7:00 PM EST
Broken 3,500'
Scattered 2,500'
6sm
300° 16kts
Gusts 25kts
TAF KDTW 081720Z 0818/0924 17010KT P6SM SCT100 BKN200
   FM090100 15013KT P6SM OVC045
   FM090500 16014G23KT 5SM -SHRA SCT025 OVC035 WS020/19040KT
   FM090700 18016G25KT 4SM -SHRA SCT015 OVC025 WS020/20040KT
   FM090900 19016G26KT 4SM -SHRA OVC018 WS020/21040KT
   FM091400 21021G33KT P6SM SCT015 BKN025
   TEMPO 0914/0917 5SM -SHRA OVC020
   FM092100 30016G25KT P6SM SCT025 BKN035
KONZ
EffectiveExpiresCategoryNOTAM
Domestic
12/29/25
1708Z
1/12/26
2359Z
!ONZ 12/039 ONZ OBST TOWER LGT (ASR 1001046) 420944.00N0831220.00W (4.3NM NNW ONZ) 931.8FT (337.9FT AGL) U/S 2512291708-2601122359
12/26/25
1534Z
2/9/26
1534Z
!ONZ 12/038 ONZ OBST TOWER LGT (ASR 1006927) 420639.00N0831152.00W (1.8NM WNW ONZ) 866.1FT (291.0FT AGL) U/S 2512261534-2602091534
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
12/24/25
1104Z
2/7/26
1103Z
!ONZ 12/037 ONZ OBST TOWER LGT (ASR 1006094) 421005.00N0831254.00W (4.8NM NNW ONZ) 1305.1FT (710.0FT AGL) U/S 2512241104-2602071103
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
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 95°275°
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 95°275°
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.
GROSSE ILE MUNI (ICAO: KONZ, IATA: ONZ) is a public airport located in DETROIT/GROSSE ILE, MI.