← All airports
Kaiser Permanente Antioch Medical Center Helport Heliport
US-4138 · Antioch, CA · 220 ft elevation
Airport information
- FAA LID
- US-4138
- Coordinates
- 37.9519, -121.7743
- Elevation
- 220 ft MSL
Detailed FAA facility data isn't available for this airport.
Weather
METAR observed
Loading current weather…
TAF forecast
Loading forecast…
Sun & FAA night 2026-06-20
| Event | Local (PDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:13 AM | 12:13Z |
| Sunrise | 05:45 AM | 12:45Z |
| Sunset | 08:33 PM | 03:33Z |
| Evening civil twilight Loggable night begins | 09:04 PM | 04:04Z |
Loggable night (§1.1)
09:04 PM → 05:13 AM
Night currency (§61.57)
09:33 PM → 04:45 AM
Plan a flight from US-4138
Headings shown are true (magnetic variation unavailable).
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| CCR · Concord | VOR-DME | 117.00 | r096° / 14 NM |
| SUU · Travis | TACAN | 116.60 | r138° / 19.4 NM |
| TZZ · Travis | VOR | 116.40 | r159° / 23.6 NM |
| OAK · Oakland | VORTAC | 116.80 | r040° / 25.3 NM |
| ECA · Manteca | VORTAC | 116.00 | r267° / 29.5 NM |
| SAC · Sacramento | VORTAC | 115.20 | r183° / 31.3 NM |
| SGD · Scaggs Island | VORTAC | 112.10 | r099° / 31.4 NM |
VFR sectional
No published instrument procedures or Chart Supplement for US-4138. VFR sectional link above.
No published services or facility detail for US-4138.
Nearby airports
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 US-4138 in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator.