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San Marcos Regional Airport (KHYI) — San Marcos, United States

San Marcos Regional Airport (KHYI) serves San Marcos, United States. This is a mid-sized airport with 3 runways (08/26, 13/31). Field elevation is 597 ft AMSL. Data on this page is maintained by the aviation community — contribute to keep it accurate.

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81% Data Complete 42 of 52 points
Missing: Contacts
Section Breakdown
Basic Info 7/7
Runways 4/4
Frequencies 4/4
Operations 2/2
Fuel 1/1
Contacts 0/2
Additional Info 2/10
Observed Activity · Jul 26
71 aircraft observed within 6 NM · busiest hour 17:00Z
2026-07-182026-07-26
Distinct ADS-B aircraft seen within 6 NM below 10,000 ft AGL per UTC day · community-feed coverage varies · not official movement totals
Data last updated:
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Basic Airport Information

  • ICAO: KHYI
  • Name: San Marcos Regional Airport
  • Type: medium_airport
  • Category: Domestic
  • Latitude: 29.8927
  • Longitude: -97.862999
  • Elevation: 597 ft
  • Country: United States
  • Municipality: San Marcos
  • IATA Code: N/A
  • FAA Code: N/A
  • FIR: N/A
  • Timezone: America/Chicago
  • Distance from City: N/A km
  • VFR: Yes
  • IFR: No

Runways

Runway 08/26

  • Designation: 08/26
  • Dimensions: 1929x30m
  • Surface: ASP
  • PCN: N/A
  • Lighting: Lighted
  • NAVAIDs: N/A
  • Approach Types: N/A
  • Remarks: N/A

Runway 13/31

  • Designation: 13/31
  • Dimensions: 1707x30m
  • Surface: ASP
  • PCN: N/A
  • Lighting: Lighted
  • NAVAIDs: N/A
  • Approach Types: N/A
  • Remarks: N/A

Runway 17/35

  • Designation: 17/35
  • Dimensions: 1589x30m
  • Surface: ASP
  • PCN: N/A
  • Lighting: Lighted
  • NAVAIDs: N/A
  • Approach Types: N/A
  • Remarks: N/A

Frequencies

  • Tower: 126.825 MHz
  • Ground: 120.125 MHz
  • Operations: 126.825 MHz
  • Traffic/Approach: N/A
  • ATIS: 120.825 MHz

Operation Hours

Monday 12:00 – 02:00
Tuesday 12:00 – 02:00
Wednesday 12:00 – 02:00
Thursday 12:00 – 02:00
Friday 12:00 – 02:00
Saturday 12:00 – 02:00
Sunday 12:00 – 02:00
  • Extra Hours On Request: No
  • Remarks: N/A

Contacts

  • AIS Tel: N/A
  • ARO Tel: N/A
  • MET Tel: N/A
  • Admin Tel: +1 512-216-6039
  • Health Tel: N/A
  • Police Tel: N/A
  • Authorities Tel: N/A
  • Website: N/A
  • Remarks: N/A

Slots / PPR

  • Slot Required: No
  • PPR Required: No
  • PPR Contact: N/A
  • Remarks: N/A

Fuel Information

  • Fuel Type: 100LL
  • Price/L: N/A
  • Last Updated: N/A
  • Remarks: N/A
  • Fuel Type: Jet A+
  • Price/L: N/A
  • Last Updated: N/A
  • Remarks: N/A

Immigration

  • Port of Entry: No
  • GENDEC Required: No
  • GAR Required: No
  • Remarks: N/A

Airport Services

No services listed for this airport yet.

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United States Permit Requirements

Fast Landing: 1d
  • Overflight Permit: No
  • Landing Permit: Conditional
  • Overflight Lead Time: N/A
  • Landing Lead Time: 60 minutes minimum (eAPIS manifest before departure); recommend 24-48 hours for CBP port notification
Private / GA Operations:

No permits required for private non-revenue flights. eAPIS manifest mandatory for all international arrivals/departures.

View Full United States Permit Details

Active NOTAMs

05/009 warning
ILS out of service
ILS RWY 13 OM U/S
2026-05-25 13:17:00 2026-10-30 20:00:00
1/8 caution
Instrument procedure change
HYI SAN MARCOS RGNL, AUSTIN, TX. ILS OR LOC RWY 13, AMDT 6D... NOTE: WHEN LOCAL ALTIMETER SETTING NOT RECEIVED, USE NEW BRAUNFELS ALTIMETER SETTING: INCREASE S-ILS 13 DA TO 835 FEET; INCREASE ALL MDA 60 FEET AND VISIBLITY CIRCLING CAT C 1/8 SM AND D 1/4 SM. NOTE: FOR INOPERATIVE ALS WHEN USING NEW B…
2026-07-26 13:48:00 2027-03-07 13:47:00
07/007 info
AUTOMATED WX BCST SYSTEM U/S
2026-07-27 14:00:00 2026-07-27 20:00:00

+9 more active NOTAMs

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Compare KHYI with 57TX side by side →

Airport History

Discover the key milestones and historical events that shaped San Marcos Regional Airport. Our community-powered timeline traces this airport's journey from its origins to the present day.

Explore History
Frequently Asked Questions
What are the operating hours of KHYI?
San Marcos Regional Airport operates from 12:00 to 02:00.
What is the tower frequency at KHYI?
The tower frequency at San Marcos Regional Airport is 126.825 MHz.
What fuel is available at KHYI?
San Marcos Regional Airport offers 100LL, Jet A+.
Does KHYI require landing permits?
Yes, landing permits are required for San Marcos Regional Airport (United States).
Where is KHYI located?
San Marcos Regional Airport (KHYI) is located in San Marcos, United States.
How long is the runway at KHYI?
The main runway at San Marcos Regional Airport (08/26) measures 1929x30m.
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