How many air passenger miles are travelled in each year?

As of recent data, global air passenger traffic reached approximately 4.5 trillion revenue passenger kilometers (RPK) in 2019, before the COVID-19 pandemic significantly impacted travel in 2020. In 2021 and 2022, the numbers began to recover, with RPKs gradually increasing as travel restrictions eased. For specific yearly figures, it’s best to refer to the latest reports from organizations like the International Air Transport Association (IATA) or the International Civil Aviation Organization (ICAO).