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Oneworld (marketed as oneworld; CRS: *O) is an airline alliance founded on 1 February 1999. The alliance's stated objective is to be the first-choice airline alliance for the world's frequent international travellers. Its central alliance office is in Manhattan, New York, United States. Its member airlines include American Airlines, British Airways, Cathay Pacific, Finnair, Iberia, Japan Airlines, LATAM Airlines, Malaysia Airlines, Qantas, Qatar Airways, Royal Jordanian, S7 Airlines and SriLankan Airlines, plus some 30 affiliated airlines. As of October 2017, Oneworld is the third-largest global alliance in terms of passengers with more than 527.9 million passengers carried, behind Star Alliance (689.98 M) and SkyTeam (665.4 M). Its slogan is "An alliance of the world's leading airlines working as one."

As of October 2017, its member airlines collectively operate a fleet of 3,447 aircraft, serve about 1,000 airports in more than 158 countries, carrying 527.9 million passengers per year on 12,738 daily departures, generating annual revenues of more than US$130 billion.

This one is an experimental app to help passengers who all are flying within one world alliance .