寰宇一家（英语：oneworld）是全球第三大的航空联盟，于1999年成立，初时总部位于加拿大温哥华，其后于2011年5月26日正式宣布把总部迁往美国纽约市。其成员航空公司及其附属航空公司在航班时间、票务、代码共享、乘客转机、飞行常客计划、机场贵宾室及降低支出等多方面进行合作。

寰宇一家现有15家成员航空公司，包括柏林航空、美国航空、英国航空、马来西亚航空、澳洲航空、芬兰航空、日本航空、国泰航空、西班牙国家航空、智利国家航空、卡塔尔航空、皇家约旦航空、S7航空、斯里兰卡航空、巴西天马航空、以及24家联属成员航空公司。寰宇一家现通达155国家、共1010个航点，每日航班数目14,011次，以3428架的机队接载超过5亿名乘客。

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 travelers. Its central alliance office is currently based in New York, New York, in the United States. Its member airlines include Air Berlin, American Airlines, British Airways, Cathay Pacific, Qantas, Iberia, Finnair, Japan Airlines, LAN Airlines, Malaysia Airlines, Qatar Airways, Royal Jordanian, S7 Airlines, SriLankan Airlines and TAM Airlines, plus some 30 affiliated airlines. As of 31 March 2016, Oneworld is the third largest global alliance in terms of passengers with more than 537 million passengers carried, behind Star Alliance (637 M) and SkyTeam (587 M). Its slogan is "An alliance of the world's leading airlines working as one."