St Louis Downtown Airport traffic pattern

Pattern altitude at St Louis Downtown Airport (CPS · KCPS) is 1,400 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and 30R, 12R are charted right traffic.

All of St Louis Downtown Airport — runways, frequencies, charts and live weather

Pattern diagram

Drawn to scale from the FAA NASR runway alignments and the per end right traffic flags — pick a runway to see its pattern. Live wind picks the favored runway when KCPS reports it.

RWY 23LEFT traffic

Heading: 227° mag · 227° true
Dimensions: 2,799 × 75 ft
TPA: 1,400 ft MSL (≈1,000 AGL) · standard
Surface: Asphalt
CTAF: 119.925

More details — RWY 23

Threshold elev: 409 ft
Markings: basic
Approach obstacle: Tower, 72 ft, 1,647 ft from threshold, 16 ft R of centerline — 20:1 slope to clear
TDZ elevation: 413 ft
Declared TORA/TODA/ASDA/LDA: 2,799 / 2,799 / 2,799 / 2,799 ft

Condition: Fair. Edge lights: Med. Weight bearing: Single wheel 12k. PCN 11.

Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates

Pattern direction by runway

Runway	Pattern	Heading	Pattern altitude
05	Left traffic	047° mag	1,400 ft MSL (≈1,000 AGL)
23	Left traffic	227° mag	1,400 ft MSL (≈1,000 AGL)
12L	Left traffic	122° mag	1,400 ft MSL (≈1,000 AGL)
30R	Right traffic	302° mag	1,400 ft MSL (≈1,000 AGL)
12R	Right traffic	122° mag	1,400 ft MSL (≈1,000 AGL)
30L	Left traffic	302° mag	1,400 ft MSL (≈1,000 AGL)

No pattern altitude is published for KCPS; the figure above is the AC 90-66B 1,000 ft AGL convention for propeller aircraft, rounded to the field. Turbine aircraft normally fly 1,500 ft AGL. Headings are the runway alignment; downwind is the reciprocal.

Flying the pattern at KCPS

St Louis Downtown Airport is towered, working 119.925. Contact the tower before entering the surface area and fly the pattern you are assigned — the directions below are the charted default when no instruction is given.

Watch the right traffic ends here: 30R, 12R. A right pattern at a field where the other end is left is the single most common place to end up pointing at opposing traffic. The full entry procedure is here →

Frequently asked

What is the traffic pattern altitude at KCPS?

St Louis Downtown Airport has no traffic pattern altitude published in the FAA NASR data. The AC 90-66B convention for propeller aircraft is 1,000 ft AGL, which works out to roughly 1,400 ft MSL (≈1,000 AGL) here — but confirm it against the Chart Supplement before you fly, since a field can have a non standard pattern altitude that NASR does not carry.

Does KCPS have right traffic?

Yes, on 2 runway ends: 30R, 12R. Every other end at St Louis Downtown Airport is standard left traffic.

Do I fly a standard pattern at KCPS?

St Louis Downtown Airport is towered (119.925), so the pattern shown here is the charted default — but the controller's instruction overrides it. Expect straight in approaches, base entries and midfield crossings as traffic dictates.

More about KCPS

Pattern direction and alignment are drawn from the FAA NASR (28-day cycle); the diagram is generated, not an FAA chart. Pattern altitude is shown as published where NASR carries one, otherwise as the AC 90-66B 1,000 ft AGL convention. For planning and education only; always verify against the Chart Supplement.