Former army officer Henry Worsley was just 30 miles (48 kilometers) from the end of the almost 1,000-mile (1,600 kilometer) trek when he called for help and was airlifted off the ice Friday.
His family said Monday that Worsley died "following complete organ failure" at a clinic in Punta Arenas, Chile.
The 55-year-old Worsley covered more than 900 miles in 71 days, pulling supplies on a sled, while attempting to complete Ernest Shackleton`s unfinished South Pole expedition of a century ago.
Worsley`s wife Joanna said the expedition had raised more than 100,000 pounds ($140,000) for wounded troops.
Prince William, patron of the expedition, said he and brother Prince Harry had lost a friend.
British explorer Henry Worsley dies on solo Antarctic trek
25 January 2016
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A British adventurer has died after suffering exhaustion and dehydration while attempting to cross the Antarctic alone.
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