Departure boards tell you when flights leave — not how crowded the building will be.
For each supported airport, every departing flight is drawn as a horizontal bar spanning the time its passengers are inside the terminal — from when they typically arrive (default 3 hours before departure, adjustable) until boarding closes (default 30 minutes before). Where bars overlap, people are in the building at the same time. The yellow curve underneath sums those overlaps minute by minute; its peak is the busiest moment of the day. Click anywhere on the timeline to place a probe line and read the load at that exact time.
The curve is a relative load index, not a headcount. Every flight is weighted equally, arrival behaviour is a model, and nobody meeting, greeting, or working at the airport is counted. Treat it as an answer to when the terminal fills up, not how many people are in it.
Straight from the airports' own public departure boards, fetched server-side at most every 5 minutes. Copenhagen additionally publishes live security-queue waiting times, which are shown per terminal. Flight times are exactly as reliable as the airport's own board.
Everything on this site is available as JSON, free, no key: /api/airports lists the supported airports, /api/airports/CPH/departures returns the normalized live board. A machine-readable guide lives at /llms.txt — AI agents welcome. Please respect the 5-minute cadence.
airporttraffic.info is created and run by SyskStudio. If an airport you care about is missing, or a board looks wrong, we want to know.