Reference only — not for real-world navigation.
CT21
Sunnyvale Field · North Stonington
Key Facts
Essential technical summary for MSFS 2020/2024 and X-Plane.
ILS Approach StatusILS DATA NOT IN DATABASE
Field Elevation
213 ft / 65 m
Transition Altitude
18,000 ft
Primary Channel
—
Live Conversion
inHg
hPa
Runway Summary (Quick-Links)
1/19 · 2,004 ft · DirtUNLITFlight Planning
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Welcome to the technical flight briefing for Sunnyvale Field (CT21), located in North Stonington, United States. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 1 active runway with a maximum elevation of 213 ft. Please note that this field primarily supports VFR and visual approach procedures.Reference the data below for primary communication channels and detailed runway characteristics. Pilots should observe a Transition Altitude of 18,000 ft verified for this field for altimeter reset procedures.
Full Name
Sunnyvale Field
ICAO / IATA
CT21 / —
Municipality
North Stonington
Country
Region
US-CT — Connecticut
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
213 ft
Pilot Toolbox
External charts, live tracking and weather reports.
Runway 1 / 19
UNLIT
Runway Length: 2,004 ft / 611 m
Runway Width: 50 ft / 15 m
Surface Type: Dirt
Heading: —° / —°
Runway Width: 50 ft / 15 m
Surface Type: Dirt
Heading: —° / —°
RWY 1
No ILS / Visual Only
RWY 19
No ILS / Visual Only
No frequency data available.
Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: AIP 2026 Researched · Cycle: Jan 2026