< PrevNext > 58. UnitedHealth Group Minnetonka, Minn. Share 2017 U.S.-Booked Air Volume: $71 millionPrincipal U.S. Online Booking Tool: ConcurPrincipal Global Expense Supplier: ConcurPrincipal Payment Supplier: US BankConsolidated Global TMC: BCDUnitedHealth Group implemented stricter pretrip approvals in 2017, contributing to a $9 million drop in U.S.-booked air volume as companywide revenue grew from $184.8 billion to $201.2 billion. Ninety percent of its 2017 U.S.-booked air volume was for domestic travel. Eighty-seven percent of U.S.-booked airline tickets were made through UnitedHealth's online booking tools. UnitedHealth has a single global travel policy.