St John Airport Private
4MD9 · Owings Mills, MD · Non-towered · Print kneeboard
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-07 · night begins 08:43 PM
| Event | Local (EDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:42 AM | 09:42Z |
| Sunrise | 06:12 AM | 10:12Z |
| Sunset | 08:13 PM | 00:13Z |
| Evening civil twilight Loggable night begins | 08:43 PM | 00:43Z |
Plan a flight from 4MD9
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Full reports: nearest reporting station
Advisories
Airspace hazards
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Runways
RWY 20LEFT traffic
- Heading
- 210° mag · 200° true
- Dimensions
- 2,600 × 120 ft
- TPA
- 1,500 ft MSL (≈1,000 AGL) · standard
- Surface
- Turf
Enter the left downwind (heading 030°) on the 45° at 1,500 ft MSL (≈1,000 AGL).
More details — RWY 20
- Approach obstacle
- Trees, 18 ft, 0 ft from threshold
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: schematic (headings + lengths)
| Runway | Length | Your margin |
|---|---|---|
| 02/20 | 2,600 ft |
Prefer one flat page? Full runway details for 4MD9 → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the 4MD9 kneeboard →
Comms & NavAids
Nearby navigation aids
EMI 117.90 · BAL 115.10 · FDK 116.85 · +1
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| EMI · Westminster | VORTAC | 117.90 · 126X | High | r103° / 10.1 NM |
| BAL · Baltimore | VORTAC | 115.10 · 98X | Low | r357° / 19.1 NM |
| FDK · Frederick | VOR/DME | 116.85 · 115Y | Low | r090° / 28.8 NM |
| DCA · Washington | VOR/DME | 111.00 · 47X | Low | r028° / 39.4 NM |
Charts & procedures
No published instrument procedures or Chart Supplement for 4MD9 — open it on the VFR sectional →
Airport info
Airport information
- FAA LID
- 4MD9
- Coordinates
- 39.4806, -76.7606
- Elevation
- 461 ft MSL
- Magnetic variation
- 10W
- Sectional chart
- WASHINGTON
- Airport use
- Private
- Control tower
- No
- ARTCC
- WASHINGTON (ZDC)
- Flight service (FSS)
- LEESBURG · 1-800-WX-BRIEF
- Attendance
- UNATNDD
- Segmented circle
- No
- Activated
- 1992/12
- Distance from city
- 4 N
Ownership & management 2 contacts
Remarks FAA · 1 notes
General
- FOR CD CTC POTOMAC APCH AT 866-429-5882
Nearby airports
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Also nearby: MD95 Reservoir Airport (private) (6 NM) · 2W2 Clearview Airpark (12 NM) · MD48 Albrecht Airstrip (private) (12 NM) · 8MD0 Suzie Field (private) (13 NM) · MD78 Woodbine Airport (private) (16 NM)
About 4MD9
St John Airport (4MD9) is an airport in Owings Mills, MD, at 461 ft MSL. It has 1 runway, the longest 2,600 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 4MD9, refreshed from the Aviation Weather Center and FAA NASR.
Does 4MD9 have a control tower?
No. St John Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at 4MD9?
St John Airport has 1 runway; the longest is 2,600 ft. See the Runways section for headings, surface, and lighting.
Where is 4MD9?
St John Airport is in Owings Mills, MD, at an elevation of 461 ft MSL. Coordinates: 39.4806, -76.7606.
Fly out of 4MD9 often?
Save 4MD9 as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open 4MD9 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.