About FlightVsLight
FlightVsLight is a standalone browser tool for seeing how a flight lines up with daylight, darkness, twilight, time zones, and route direction.
What It Does
Enter a departure airport, arrival airport, departure time, and a timing estimate. FlightVsLight draws the route on a world map and shows where the aircraft is likely to be in daylight, twilight, or night as the trip progresses. It is designed to make an itinerary feel understandable at a glance, especially when time zones and date changes make the flight hard to picture.
Who It Is For
The tool is built for travelers choosing flights, aviation enthusiasts comparing routes, photographers hoping for golden-hour windows, and curious people who want to understand what actually happens between departure and arrival. It can help answer whether a route stays mostly in daylight, crosses sunset, wakes into sunrise, or spends most of the trip in darkness.
How It Works
FlightVsLight runs in the browser using airport data, great-circle route geometry, time-zone formatting, solar position math, and a simple typical winds-aloft model for estimate mode. It is not a live tracking system or weather service. The goal is a fast, visual planning experience that helps you reason about the shape and light of a flight before you take it.
Why It Exists
Flight itineraries are full of local times, date changes, and durations, but they rarely explain what the trip will feel like. FlightVsLight turns those details into a visual timeline so you can see the relationship between the aircraft, the sun, and the planet underneath. It is meant to be quick to use, easy to share, and clear enough for both casual travelers and avgeeks.