In 2015, Star Alliance was the largest with 23% of total scheduled traffic in Revenue passenger kilometres (RPKs)/revenue passenger miles (RPMs), followed by SkyTeam with 20.4% and Oneworld with 17.8%, leaving 38.8% for others.[2] In 2019, by number of passengers, Star Alliance was leading 762 million,[3] followed by SkyTeam (630 million)[4] and Oneworld (535 million).[5]