Where every flight is CAVOK.
AI-powered pre-flight briefing for MSFS 2020/2024, X-Plane 12 & Prepar3D. Real weather. Real airspace. Realistic planning — all in your browser.
Start Planning for FreeFor flight simulator entertainment only · Not for real aviation use
What you get
SimCAVOK pulls live data from public aviation APIs and runs it through an AI layer so you get a realistic briefing in seconds.
Direct, VOR/DME, or fully manual routing. Click waypoints on the Leaflet map or type ICAO codes — your choice.
METAR, TAF, SIGMET, AIRMET, PIREP and NOTAMs fetched from aviationweather.gov. Automatic VFR/MVFR/IFR/LIFR classification.
OpenAIP airspace polygons loaded into PostGIS. CTR, RMZ, TMZ and Restricted zones highlighted on your route automatically.
Per-leg fuel burn, trip total, 45-minute reserve, taxi allowance and alternate fuel — with a clear GO / CAUTION / NO-GO verdict.
Structured flight data is sent to OpenRouter (Claude / Gemini). Streaming AI narrative briefing with go/no-go recommendation.
Export your route as a Microsoft Flight Simulator 2020/2024 flight plan file with one click — ready to load in the sim or prefile it on VATSIM.
The workflow
SimCAVOK runs your flight through a structured pipeline — deterministic calculations first, AI narrative last.
Enter departure, destination, aircraft profile and cruise altitude. ICAO codes are validated against airport data.
Route is calculated via Haversine. Each leg is checked against airspace polygons using PostGIS spatial queries.
Live data fetched in parallel,parsed, categorised and translated into plain-language summaries.
Leg-by-leg navigation log with ETE, fuel burn, wind correction angle, and total endurance margin calculated deterministically.
The flight data is sent to an AI layer. The streaming briefing includes a final GO / CAUTION / NO-GO verdict.
Pricing
Start for free. Upgrade when you want more.
Free
€0 / month
No account required. Just open the app and start planning.
Subscriber
starting at €3 / month
For the sim pilot who flies regularly and wants the full experience.
SimCAVOK is exclusively an entertainment and educational tool for flight simulator software (MSFS 2020/2024, X-Plane 12, Prepar3D). It is not intended for use by real pilots, does not replace any certified pre-flight briefing service, and holds no aviation certification of any kind. No B2B use in flight schools. Weather and NOTAM data displayed may be delayed, incomplete or inaccurate. Always obtain an official briefing before any real flight.