Sources

Flights: the airports' own arrivals and departures boards, as collected by Pro Flight Search. Gate clocks: the board clock measurements of willmyflightbedelayed.com, against aircraft positions and US gate times. Airports: OurAirports (public domain) and mwgg/Airports (MIT). Airline groups: the alliances and their partners. Fonts: Manrope and Hanken Grotesk (SIL Open Font License).