Many passengers wonder what terminal is finnair at heathrow before traveling. Finnair operates from Heathrow Terminal 3, offering organized check-in, efficient security screening, lounge access, dining options, and smooth international connections. Knowing [**what terminal is finnair at heathrow**](https://www.terminalatairport.com/finnair/finnair-terminal-lhr-airport/) helps travelers plan arrivals, departures, and connections with confidence.