The expanding global air network provides rapid and wide-reaching connections accelerating both domestic and international travel. To understand human movement patterns on the network and their socioeconomic, environmental and epidemiological implications, information on passenger flow is required. However, comprehensive data on global passenger flow remain difficult and expensive to obtain, prompting researchers and analysts to rely on scheduled flight seat capacity data or simple models of flow. WorldPop has collated openly available monthly statistics of air passengers across countries and years, and developed models of global air passenger flows, with annual flow methods described in Huang et al, seasonal flows described in Mao et al, and the dataset collected and output estimates available to download here.