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ST LOUIS DOWNTOWN - Airport Diagram
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KCPS
ST LOUIS DOWNTOWN
PublicPUB

1 miles E of CAHOKIA/ST LOUIS, IL, US
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Operational
38° 34' 13"N 90° 09' 18"W
413' MSL
1413' MSL
02W
JET A, 100LL
SAINT LOUIS (STL)
ST LOUIS
KANSAS CITY (ZKC)
1/22/26-2/19/26
KCPS VFR
9:53 PM CST  
Overcast 6,000'
10sm
18°F
10°F
30.36"Hg
010° 8kts
AO2 SLP286 T10781122 $
METAR KCPS 300353Z 01008KT 10SM OVC060 M08/M12 A3036 RMK AO2 SLP286 T10781122 $
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KCPS FBOs

KCPS Aircraft Service & Maintenance

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Parks Aviation
Phone: (618) 727-5769
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Gulfstream Aerospace Corp.
Phone: (618) 874-4477
Fax: (618) 697-8877
Other: (800) 222-0422
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KCPS Flight Schools & Aircraft Rental

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Southwestern Illinois College
Phone: (618) 797-7393
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Weather and Advisory

ATIS 121.45
ASOS (618) 332-0001

Common

CTAF 119.925
ACTVT MALSR RWY 30L WHEN ATCT CLSD; REIL RWY 30R - CTAF. HIRL RWY 12R/30L PRESET MED INTST WHEN ATCT CLSD. MIRL RWY 12L & 30R NOT AVBL WHEN ATCT CLSD. PAPI RWY 12R & 30L OPR CONSLY.
UNICOM 122.95

Clearance

Clearance Delivery 118.275
Clearance Delivery 121.8
WHEN TWR CLSD

Ground

DOWNTOWN GROUND 121.8
0630-2200

Tower

DOWNTOWN TOWER 119.925
0630-2200

Arrival

BUUDD STAR 119.15
DELMA STAR 128.1
DIXEE STAR 128.1
FARMR STAR 119.15

Approach

SAINT LOUIS APPROACH 123.7

Departure

SAINT LOUIS DEPARTURE 123.7

Terminal Area Forecast

KCPS
Thu, 1/29 5:32 PM CST
Thu, 1/29 6:00 PM CST - Fri, 1/30 6:00 PM CST
VFR
6:00 PM CST - 8:00 PM CST
Broken 7,000'
6sm
030° 6kts
MVFR
8:00 PM CST - 12:00 AM CST
Light Snow
Overcast 4,000'
5sm
020° 5kts
VFR
12:00 AM CST - 8:00 AM CST
Overcast 6,000'
6sm
VRB° 3kts
VFR
8:00 AM CST - 2:00 PM CST
Scattered 10,000'
6sm
350° 6kts
MVFR
2:00 PM CST - 6:00 PM CST
Broken 2,500'
6sm
340° 10kts
TAF KCPS 292332Z 3000/3024 03006KT P6SM BKN070
   FM300200 02005KT 5SM -SN OVC040
   FM300600 VRB03KT P6SM OVC060
   FM301400 35006KT P6SM SCT100
   FM302000 34010KT P6SM BKN025
KCPS
EffectiveExpiresCategoryNOTAM
Domestic
1/29/26
2153Z
1/30/26
2153Z
!CPS 01/172 CPS TWY A4, B4, B, C, C4, A3, B3, TWY B7 BTN TWY B AND APCH END RWY 30L, TWY B5 BTN TWY B AND RWY 12R/30L, TWY B1 BTN TWY B AND APCH END RWY 12R FICON PATCHY ICE AND PATCHY COMPACTED SN OBS AT 2601292153. 2601292153-2601302153
1/29/26
2148Z
1/30/26
2148Z
!CPS 01/171 CPS APRON WEST RAMP FICON PATCHY ICE AND PATCHY COMPACTED SN 3FT SNOWBANKS OBS AT 2601292148. 2601292148-2601302148
1/29/26
2147Z
1/30/26
2147Z
!CPS 01/170 CPS APRON EAST RAMP 1, EAST RAMP 2, EAST RAMP 3, EAST RAMP 4 FICON PATCHY ICE AND PATCHY COMPACTED SN 5FT SNOWBANKS OBS AT 2601292147. 2601292147-2601302147
1/29/26
2146Z
1/30/26
2146Z
Runway!CPS 01/169 CPS RWY 12R FICON 10 PCT COMPACTED SN PLOWED 150FT WID 3FT SNOWBANKS OBS AT 2601292146. 2601292146-2601302146
1/29/26
1708Z
3/30/26
1700Z
Runway!CPS 01/168 CPS RWY 30R RWY END ID LGT U/S 2601291708-2603301700
1/29/26
1500Z
5/29/26
1500Z
!CPS 01/167 CPS OBST TOWER LGT (ASR 1008552) 382043.20N0901444.10W (14.2NM SSW CPS) 909.1FT (264.1FT AGL) U/S 2601291500-2605291500
1/29/26
0149Z
1/30/26
2300Z
!CPS 01/166 CPS TWY B5 BTN TWY B AND RWY 12L/30R CLSD 2601290149-2601302300
1/29/26
0147Z
1/30/26
2300Z
!CPS 01/165 CPS TWY B6 BTN TWY B AND RWY 12L/30R CLSD 2601290147-2601302300
1/28/26
1513Z
1/31/26
2300Z
!CPS 01/148 CPS TWY A6, A6 RUNUP PAD, TWY A3 BTN APCH END RWY 12L AND TWY A CLSD 2601281513-2601312300
1/28/26
1503Z
1/30/26
2300Z
!CPS 01/144 CPS TWY B3 CLSD 2601281503-2601302300
1/26/26
1554Z
1/30/26
2300Z
Runway!CPS 01/115 CPS RWY 12L/30R CLSD EXC HEL 2601261554-2601302300
1/10/26
2204Z
8/31/26
2359Z
!CPS 01/024 CPS OBST TOWER LGT (ASR 1286785) 382422.20N0902147.30W (13.9NM SW CPS) 901.9FT (321.9FT AGL) U/S 2601102204-2608312359
1/8/26
2311Z
7/8/26
2359Z
!CPS 01/016 CPS OBST BLDG (ASN UNKNOWN) 383740N0901141W (3NM NW CPS) 1055FT (588FT AGL) U/S 2601082311-2607082359
12/31/25
1455Z
6/30/26
2359Z
!CPS 12/088 CPS TWY C SFC MARKING NOT STD 2512311455-2606302359
12/31/25
1455Z
6/30/26
2359Z
Runway!CPS 12/087 CPS RWY 05/23 SFC MARKING NOT STD 2512311455-2606302359
12/31/25
0212Z
2/1/26
0559Z
!CPS 12/084 CPS TWY B CL MARKINGS BTN TWY B4 AND TWY B5 REMOVED 2512310212-2602010559
12/31/25
0211Z
2/1/26
0559Z
!CPS 12/083 CPS TWY B5 HLDG PSN MARKINGS FOR RWY 12L/30R OBSC 2512310211-2602010559
12/31/25
0210Z
2/1/26
0559Z
!CPS 12/082 CPS TWY B4 CL MARKINGS BTN RWY 12L/30R AND TWY B OBSC 2512310210-2602010559
12/29/25
1838Z
2/27/26
2300Z
!CPS 12/081 CPS TWY B7 BTN TWY B AND APCH END RWY 30R CLSD 2512291838-2602272300
12/28/25
1601Z
3/28/26
0500Z
!CPS 12/079 CPS OBST TOWER LGT (ASR 1021677) 383531.70N0900202.30W (5.8NM ENE CPS) 1046.9FT (475.1FT AGL) U/S 2512281601-2603280500
12/18/25
2336Z
2/18/26
2359Z
!CPS 12/064 CPS OBST TOWER LGT (ASR 1044421) 383207.00N0902223.00W (10.5NM WSW CPS) 1650.3FT (1049.9FT AGL) U/S 2512182336-2602182359
10/10/25
1541Z
!CPS 10/012 CPS OBST TOWER LGT (ASR 1003920) 382856.00N0902353.00W (12.6NM WSW CPS) 1649.3FT (1073.2FT AGL) U/S 2510101541-2610092359EST
8/29/25
0747Z
!CPS 08/031 CPS NAV ILS RWY 30L OM U/S 2508290747-2608262000EST
FDC
12/2/25
1551Z
!FDC 5/3210 CPS SID ST LOUIS DOWNTOWN, CAHOKIA/ST LOUIS, IL.
LINDBERGH NINE DEPARTURE ...
LITTLE ROCK TRANSITION NA EXCEPT FOR ACFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS. LIT R-018 UNRELIABLE AT WEZRR. 2512021551-2711271551EST
9/23/25
1426Z
5/5/26
1426Z
!FDC 5/9038 CPS SID ST LOUIS DOWNTOWN, CAHOKIA/ST LOUIS, IL.
PLESS FIVE DEPARTURE...
NASHVILLE TRANSITION NA EXCEPT FOR AIRCRAFT EQUIPPED WITH SUITABLE RNAV SYSTEM WITH GPS,
BNA VOR OUT OF SERVICE. 2509231426-2605051426EST
5/19/25
2013Z
!FDC 5/2842 CPS IAP ST LOUIS DOWNTOWN, CAHOKIA/ST LOUIS, IL.
ILS OR LOC RWY 30L, AMDT 9E...
CIRCLING CAT A MDA 960/HAA 547.
2505192013-2705192013EST
Yes
ALL
BI-STATE DEVELOPMENT AGENCY
6100 ARCHVIEW DRIVE
CAHOKIA, IL 62206
Phone: 618-337-6060
SANDRA SHORE
6100 ARCHVIEW DRIVE
CAHOKIA, IL 62206
Phone: 618-337-6060
SAINT LOUIS FSS (STL)
Toll Free: 1-800-WX-BRIEF
CPS
--
ACTVT MALSR RWY 30L WHEN ATCT CLSD; REIL RWY 30R - CTAF. HIRL RWY 12R/30L PRESET MED INTST WHEN ATCT CLSD. MIRL RWY 12L & 30R NOT AVBL WHEN ATCT CLSD. PAPI RWY 12R & 30L OPR CONSLY.
N/A
Yes - Lighted
Yes
No
Hanger, Tie-Down
NOT a Landing Rights Airport
NOT an Airport of Entry
Major
Major
None
High Pressure
Charter Service
Pilot Instruction
Aircraft Rental
Aircraft Sales

Runway 05/23

2799 ft. x 75 ft.
ASPH  
Fair 
NONE 
MED 
11/R/C/W/T 
12,000lbs 
-- 
-- 
-- 
  Runway 05 Runway 23
True Heading 47°227°
Traffic Pattern
Markings BSC BSC
Markings Condition POOR POOR
Latitude 38° 34' 20"N 38° 34' 39"N
Longitude 90° 10' 07"W 90° 09' 41"W
Elevation 410' 409'
Threshold Crossing Height -- --
Visual Glide Path Angle -- --
Visual Slope Indicator -- --
Approach Lights
Centerline Lights No No
Runway End Identifier Lights No No

Runway 12L/30R

5301 ft. x 75 ft.
CONC  
Fair 
NONE 
MED 
10/F/D/X/T 
30,000lbs 
30,000lbs 
-- 
-- 
  Runway 12L Runway 30R
True Heading 122°302°
Traffic Pattern Right
Markings NPI NPI
Markings Condition FAIR FAIR
Latitude 38° 34' 26"N 38° 33' 58"N
Longitude 90° 09' 30"W 90° 08' 33"W
Elevation 410' 406'
Threshold Crossing Height -- --
Visual Glide Path Angle -- --
Visual Slope Indicator -- --
Approach Lights
Centerline Lights
Runway End Identifier Lights Yes Yes

Runway 12R/30L

7002 ft. x 150 ft.
ASPH  
Excellent 
GRVD 
HIGH 
 
96,000lbs 
125,000lbs 
182,000lbs 
-- 
  Runway 12R Runway 30L
True Heading 122°302°
Traffic Pattern Right
Markings PIR PIR
Markings Condition GOOD GOOD
Latitude 38° 34' 26"N 38° 33' 50"N
Longitude 90° 09' 54"W 90° 08' 40"W
Elevation 412' 408'
Threshold Crossing Height 49 ft. AGL 53 ft. AGL
Visual Glide Path Angle 3° 3°
Visual Slope Indicator P4L P4L
Approach Lights MALSR
Centerline Lights No No
Runway End Identifier Lights Yes No
A110-1WATERFOWL ON & INVOF ARPT.
A110-3BE ALERT FOR STUDENT TRNG & HEL OPS.
A110-5ALL TWYS EXCP TWY B4 PPR ACFT OVER 120000 LBS.
A110-6SFC CONDS NOT MNTD 2100-0700 LCL.
A26-CCLSD TO SKED ACR OPS GTR THAN 9 PSGR SEATS. UNSKED ACR OPS GTR THAN 30 PSGR SEATS RQR 12 HR PPR.
A30-05/23RWY 05/23 NOT AVBL FOR PART 121/PART 380 OPS WITH SKED PAX CARRYING OPS MORE THAN 9 PAX SEATS AND NON-SKED PAX CARRYING OPS MORE THAN 30 PAX SEATS. NO PART 121/PART 380 OPS EXC FOR TAX.
A30-12L/30RRWY 12L/30R NOT AVBL FOR PART 121/PART 380 OPS WITH SKED PAX CARRYING OPS MORE THAN 9 PAX SEATS AND NON-SKED PAX CARRYING OPS MORE THAN 30 PAX SEATS. NO PART 121/PART 380 OPS EXC FOR TAX.
A30-12R/30LW.B.C. GROSS WT (2S) 160.
A37-12R/30L200 WITH PPR.
A39-12R/30LPCR VALUE: 400/F/D/X/T
A42-05_CONDSFC MARKINGS FADED.
A42-23_CONDSFC MARKINGS FADED.
A81-APTACTVT MALSR RWY 30L WHEN ATCT CLSD; REIL RWY 30R - CTAF. HIRL RWY 12R/30L PRESET MED INTST WHEN ATCT CLSD. MIRL RWY 12L & 30R NOT AVBL WHEN ATCT CLSD. PAPI RWY 12R & 30L OPR CONSLY.
ST LOUIS DOWNTOWN (ICAO: KCPS, IATA: CPS) is a public airport located in CAHOKIA/ST LOUIS, IL, US.