San Marcos Regional Airport
HYI · KHYI · San Marcos, TX · Towered · Print kneeboard
FAA airport diagramView full size ↓ Nearby now
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-04 · night begins 08:48 PM
| Event | Local (CDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 06:27 AM | 11:27Z |
| Sunrise | 06:52 AM | 11:52Z |
| Sunset | 08:22 PM | 01:22Z |
| Evening civil twilight Loggable night begins | 08:48 PM | 01:48Z |
Plan a flight from KHYI
Past 24 hours category · wind · ceiling · visibility trends
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Density altitude today projected curve · departure window · takeoff roll
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Advisories
NOTAMs
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Pilot reports
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Airspace hazards
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Runways
RWY 13LEFT traffic
- Heading
- 126° mag · 133° true
- Dimensions
- 5,601 × 100 ft
- TPA
- 1,600 ft MSL (≈1,000 AGL) · standard
- Surface
- Asphalt
- Lights
- 2-light PAPI (left) (3°) + MALS
- ILS
- ILS · CAT I · LOC 108.7 (RUM) · GS 3.00°
- CTAF
- 126.825
More details — RWY 13
- Threshold elev
- 593 ft
- Markings
- precision
- Threshold crossing height
- 57 ft
- TDZ elevation
- 593 ft
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates
| Runway | Length | Your margin |
|---|---|---|
| 08/26 | 6,330 ft | |
| 13/31 | 5,601 ft | |
| 17/35 | 5,214 ft |
Prefer one flat page? Full runway details for KHYI → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the KHYI kneeboard →
Comms & NavAids
Communication frequencies
Before taxi
“San Marcos”Taxi & takeoff
“San Marcos”Departure & arrival
“Austin”Also
ATC assigns the exact frequency (in your clearance or on handoff) — which one depends on your SID (departing) or STAR (arriving).
By procedure & sector (6 frequencies)
| Frequency | Used by |
|---|---|
| 118.15 | SZAGI STAR (SFC-7000 FT) |
| 119.0 | AEROZ DP · BNDIA DP · ELOEL DP · ILEXY DP · MUCKY DP · SAYBR DP · SZAGI STAR (8,000-12,000 FT) |
| 127.225 | BLEWE STAR · GABOO STAR · POTRR STAR |
| 317.65 | BLEWE STAR · GABOO STAR · POTRR STAR |
| 350.25 | SZAGI STAR (SFC-7000 FT) |
| 370.85 | AEROZ DP · APCH/P DEP/P · BNDIA DP · ELOEL DP · ILEXY DP · MUCKY DP · SAYBR DP · SZAGI STAR (8,000-12,000 FT) |
Source: FAA NASR (current 28-day cycle).
Instrument landing systems
RWY 13
| Runway | ILS |
|---|---|
| RWY 13 | ILS · CAT I · LOC 108.7 (RUM) · GS 3.00° |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
DHK 109.90 · RND 112.30 · CWK 112.80 · +1
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| DHK · Randolph | TACAN | 109.90 · 36X | — | r040° / 30 NM |
| RND · Randolph | VORTAC | 112.30 · 70X | Terminal | r039° / 31.4 NM |
| CWK · Centex | VORTAC | 112.80 · 75X | High | r205° / 33.9 NM |
| SAT · San Antonio | VORTAC | 116.80 · 115X | High | r056° / 34.6 NM |
Prefer one flat list? All KHYI frequencies →
Charts & procedures
Lowest minimums here: ILS with vertical guidance · VFR sectional →
Airport info
From the field
Do you run KHYI, or an FBO, flight school, or shop on it? Claim your listing to keep fuel, fees, hours, and services current.
Airport information
- ICAO / IATA
- KHYI
- Coordinates
- 29.8927, -97.8630
- Elevation
- 595 ft MSL
- Magnetic variation
- 7E
- Sectional chart
- SAN ANTONIO
- Airport use
- Public
- Control tower
- Yes
- Tower hours
- 0700-2100 EFF 01 APR 2021
- Airspace
- Class D · CLASS D SVC 0700-2100 EFF 01 APR 2021; OTHER TIMES CLASS E
- Weather station
- AWOS-3PT · 120.825 · ☎ 512-353-8005
- ARTCC
- HOUSTON (ZHU)
- Flight service (FSS)
- SAN ANGELO · 122.2 · 1-800-WX-BRIEF
- NOTAM facility
- HYI
- Attendance
- ALL 0700-2100
- Beacon
- white-green (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- lighted
- Activated
- 1965/05
- Distance from city
- 31 S
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- MALS RWY 13; MIRL RWYS 08/26, 13/31 & 17/35 PRESET LOW INTST; TO ACTVT AND INCR INTST - CTAF. on 126.825 — Chart Supplement ↗
Runway lighting aids — 13: 2-light PAPI (left) + MALS · 31: 2-light PAPI (left) · 17: 2-light PAPI (left).
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are under Sun & FAA night in the Weather section.
Services fuel · repairs · oxygen · attendance
- Fuel available
- 100LL, Jet A (additive)
- Bottled oxygen
- LOW
- Airframe service
- MAJOR
- Powerplant service
- MAJOR
- Parking
- tiedowns, hangars
- Other services
- Avionics, Charter, Instruction, Rental, Aircraft sales
Ownership & management 2 contacts
Remarks FAA · 8 notes
General
- FOR CD CTC AUSTIN APCH AT 512-369-7865.
- APN ALL IREG SFC.
- BIRDS AND WILDLIFE ON AND INVOF ARPT.
- TSNT ACFT PRKG AVBL ON FBO RAMP ONLY. ALL OTR RAMP AREAS RESD FOR BASED ACFT OR RQR PRIOR CDN WITH ARPT MGMT.
Lighting
- MALS RWY 13; MIRL RWYS 08/26, 13/31 & 17/35 PRESET LOW INTST; TO ACTVT AND INCR INTST - CTAF.
Fuel
- 100LL SELF SVC; 100 LL & JET A+ AVBL FULL SERVE.
Obstructions
- 6 FT FENCE 130-199 FT DSTC, 360 FT L.
Attendance
- FOR AFT HRS SVC 800-229-2379. CALL-IN FEE.
Embed KHYI weather on your site free widget for schools, clubs & FBOs
Live METAR, flight category, and favored runway for KHYI — paste this into your website's HTML. It updates automatically and stays free.
More widgets — crosswind, E6B, density altitude — on the embed page.
Nearby airports
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Also nearby: 7TS2 Alison Air Park (private) (4 NM) · XS90 Fentress Airpark (private) (9 NM) · 50R Lockhart Municipal Airport (10 NM) · 2XA5 Someday Ranch Airport (private) (10 NM) · 70XS Restoration Ranch Airport (private) (11 NM) · 3TS1 White Wings Airport (private) (12 NM)
About KHYI
San Marcos Regional Airport (HYI · KHYI) is an airport in San Marcos, TX, at 595 ft MSL. It has 3 runways, the longest 6,330 ft, with a control tower. This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for KHYI, refreshed from the Aviation Weather Center and FAA NASR.
Does KHYI have a control tower?
Yes. San Marcos Regional Airport has an operating FAA control tower. See the Comms & NavAids section for tower and ground frequencies.
What is the longest runway at KHYI?
San Marcos Regional Airport has 3 runways; the longest is 6,330 ft. See the Runways section for headings, surface, and lighting.
Where is KHYI?
San Marcos Regional Airport is in San Marcos, TX, at an elevation of 595 ft MSL. Coordinates: 29.8927, -97.8630.
Fly out of KHYI often?
Save KHYI 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 KHYI 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.