Angel Flight America and AirLifeLine, said to be the two oldest and largest charitable aviation organizations in the U.S., announced at EAA AirVenture their merger, expected to be effective by the end of last month. The combined organization, operating under the Angel Flight America name and continuing Angel Flight’s six autonomous regional organizations, will coordinate an estimated 20,000 mission requests from people seeking free air transportation to specialized health-care facilities. Last year Angel Flight America flew more than 23,000 passengers on 11,000 flights, and AirLifeLine flew 9,000 passengers on 4,500 flights. About 40 percent of the missions were for children. Some 5,000 pilots volunteer their time and airplanes for the two organizations.