San Marcos Regional Airport (KHYI)
Medium airport · San Marcos, Texas, United States
Airport data
| Name | San Marcos Regional Airport |
|---|---|
| ICAO | KHYI |
| Elevation | 597 ft (182 m) above mean sea level |
| Coordinates | N 29°53'34" W 97°51'47" 29.89270, -97.86300 |
| Location | San Marcos, Texas, United States |
| Scheduled service | No |
Runways
| Runway | Length | Width | Surface | Lighted |
|---|---|---|---|---|
| 08/26 | 6,330 ft (1929 m) | 100 ft | ASP | Yes |
| 13/31 | 5,601 ft (1707 m) | 100 ft | ASP | Yes |
| 17/35 | 5,214 ft (1589 m) | 100 ft | ASP | Yes |
San Marcos Regional Airport at a glance
San Marcos Regional Airport is a medium airport in San Marcos, Texas, United States. The field elevation of 597 ft (182 m) is the number every arriving pilot dials against QNH — circuit heights and initial approach altitudes at KHYI are all figured from it. There is no scheduled airline service listed here — typical traffic is general aviation, training and local operations.
Of its 3 runways, the longest — 08/26 — offers 6,330 ft (1929 m) of asp surface, with runway lighting for night operations. Runway numbers give magnetic orientation: runway 08 points roughly 80° magnetic.
For the weather side of planning, the live METAR and TAF page for KHYI shows the current observation decoded line by line — wind on an instrument dial, visibility, cloud layers and the resulting flight rules — refreshed continuously from official sources.
Nearest airports to San Marcos Regional Airport
Distances are great-circle, measured from the field reference point — planning distances along airways or roads will run longer.
| Airport | Code | Distance |
|---|---|---|
| New Braunfels National Airport | KBAZ | 27 km (15 NM) |
| Austin Bergstrom International Airport | KAUS | 39 km (21 NM) |
| Randolph Air Force Base | KRND | 57 km (31 NM) |
| Austin Executive Airport | KEDC | 63 km (34 NM) |
| San Antonio International Airport | KSAT | 71 km (38 NM) |
Flight-planning notes for San Marcos Regional Airport
Density altitude is the quiet performance-killer at any field: on a hot day the 597 ft field elevation of San Marcos Regional Airport can translate into a substantially higher density altitude, stretching take-off rolls and flattening climb rates — run the numbers rather than trusting the feel of a standard day. Expect published instrument procedures, controlled airspace and clearance requirements; slots and handling may apply to general aviation traffic.
This entry is one of 917 airports and airfields we list for United States — the country index on the airports hub links the rest. Coordinates above are given in both DMS and decimal degrees so they can go straight into a GPS, a flight planner or a chart plot without conversion.
Where this data comes from
The reference layer behind this page builds on the OurAirports dataset — a public-domain, community-maintained register of the world's airports that many flight planners and apps rely on — with equity records preserved from documented historical listings where the dataset is silent. Figures are carried as published: elevations as surveyed, coordinates as filed, runway dimensions as recorded. Nothing is estimated to fill a gap, and the whole layer regenerates from source on every site build, so corrections upstream arrive here automatically.
Frequently asked questions about San Marcos Regional Airport
What is the ICAO code of San Marcos Regional Airport?
The ICAO identifier of San Marcos Regional Airport is KHYI, and it has no IATA code assigned. The ICAO code is the one used in flight plans, METAR reports and aeronautical charts.
How high is San Marcos Regional Airport above sea level?
San Marcos Regional Airport sits at an elevation of 597 feet (182 metres) above mean sea level. Field elevation is the reference for pattern altitudes and for setting the altimeter on the ground.
Where exactly is San Marcos Regional Airport located?
The airport lies at 29.8927, -97.8630 — in San Marcos, Texas, United States, in the northern hemisphere. The closest listed field is New Braunfels National Airport, about 27 km away.
Does KHYI publish METAR weather reports?
Where the station reports, the current METAR and TAF for KHYI appear on its live weather page on this site, refreshed continuously from the US NWS Aviation Weather Center feed.
How long is the runway at San Marcos Regional Airport?
San Marcos Regional Airport has 3 runways. The longest, 08/26, measures 6,330 ft (1929 m) with a ASP surface.