Military Airport
RestrictedThis is a Republic of Korea Air Force installation. Civil access is restricted.
Access Notes:
Military fields restricted to civil traffic
Current Weather
Raw METAR
Clouds - Visual Profile
Weather Briefing
VFROsan Air Base is currently reporting visual flight rules (VFR) conditions with overcast skies at 9,500 feet and 10 SM visibility.
Wind Analysis
Winds are from the west-northwest (290°) at 5 knots. Runway 27 is favored with a 5-knot headwind and 2-knot crosswind component.
Visibility & Ceiling
Visibility is 10 SM. The ceiling is 9500 feet AGL (overcast), well above standard VFR minimums.
Temperature & Moisture
Temperature is 31°C (88°F) with a dewpoint of 23°C, indicating moderate moisture conditions. High temperatures at this elevation may result in significant density altitude effects. Pilots should calculate density altitude and adjust performance expectations accordingly.
Forecast Outlook
The TAF forecast covers the next 30 hours. The forecast shows a transition between VFR and IFR conditions. Pilots should monitor the forecast closely and have an alternate airport plan.
Pilot Recommendations
Conditions are favorable for visual flight. The forecast indicates conditions may deteriorate. Ensure you have fuel reserves and a viable alternate airport.
This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.
Forecast (TAF)
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Airport Runway Layout
Runway Information
| Runway | Length | Width | Surface | Heading | Wind Component |
|---|---|---|---|---|---|
|
✈️ 09L/27R
Active: 27R
|
9,004 ft | 150 ft | CON | 84° |
↑ 4.7 kt
•
↔ 1.7 kt
20° angle
|
|
✈️ 09R/27L
Active: 27L
|
9,004 ft | 150 ft | CON | 84° |
↑ 4.7 kt
•
↔ 1.7 kt
20° angle
|
Weather Statistics - RKSO
9,735 observations | Sep 2025 - Aug 2026Flight Rules Distribution
Osan Air Base typically experiences VFR conditions 69.1% of the time, though instrument-rated pilots will find IFR weather present approximately 6.9% of observations. Prevailing winds are from the E averaging 6 knots. Calm conditions occur 28.2% of the time. Temperature extremes range from -13°C to 39°C, reflecting significant seasonal variation. The best months for VFR flying are August, June, January.
Wind Analysis
Temperature Range
Visibility
Best Months for VFR
Runway Wind Analysis
Statistics computed from 9,735 METAR observations (Sep 2025 - Aug 2026). Data sourced from official aviation weather services. Updated daily.
Osan Air Base - Airport Information
Airport Details
Location
Runway Information
Flight Planning Tools
Nearby Airports
About Osan Air Base
Osan Air Base is a military facility. Civilian access may be restricted or require Prior Permission (PPR). Pilots should consult the KR AIP for current access procedures and restrictions.
Overview
Osan Air Base is a medium-sized airport located in Pyeongtaek, South Korea, serving primarily military aviation operations. Situated at 38 feet above mean sea level, the base features two parallel concrete runways, each 9,004 feet long, capable of handling significant aircraft traffic. Its strategic location supports regional military and potential international aviation needs.
Flying Conditions
Weather conditions at Osan Air Base demonstrate substantial variability, with Visual Flight Rules (VFR) predominating at 66.7% of observations. The airport experiences winds primarily from the east at an average of 5.9 knots, with temperatures ranging from -13°C to 31°C. Pilots can expect good visibility averaging 7.9 statute miles, with minimal periods of restricted visibility (fog occurs in only 1.4% of observations).
Notable Features
The airport's twin parallel runways (09L/27R and 09R/27L) offer consistent operational flexibility with identical 9,004-foot lengths. Both runways demonstrate 100% favorable wind alignment and minimal average crosswind of 2.8 knots. The relatively low elevation of 38 feet MSL and geographic positioning provide generally stable approach conditions.
Approach Considerations
January, November, and December represent the most consistently favorable VFR months for operations. With easterly winds prevailing and calm conditions occurring 30.8% of the time, pilots can typically expect stable approach conditions. The runways' similar characteristics and favorable wind patterns provide predictable landing and takeoff opportunities across most meteorological conditions.
Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.
Learn More
Recommended guides based on current conditions at RKSO
Official Data Sources
Disclaimer: Data is provided for informational purposes only. Pilots must verify all information through official sources before flight operations. Weather conditions change rapidly; always obtain a current briefing from approved weather services.