Earlham College funds graduates of the United World Colleges through the Davis UWC Scholars Program, at up to half tuition plus a Davis Grant of $20,000 to $40,000.
One detail makes this materially better than Earlham's ordinary international route. The college requires non-UWC international students and their families to contribute at least $25,000 a year, and its wording carves UWC scholars out of that floor explicitly. For a UWC graduate that removes the single largest barrier to the college.
The funder is the Davis Foundation rather than Earlham alone, and eligibility turns on having attended a United World College, not on nationality. Note too that Earlham states it awards nothing toward housing, food, books or flights.