south america
2 chains
The Galapagos Islands, 768 miles or 1237 kms.
The Galápagos Islands are located approximately 900 miles west of Quito, Ecuador. This archipelago is renowned for its unique wildlife and played a significant role in Charles Darwin's theory of evolution. The islands are a UNESCO World Heritage site and attract many visitors for their stunning natural beauty and diverse ecosystems.
The Galapagos Islands, notable as a site studied by Charles Darwin, are part of Ecuador, although they are about equidistant from northern Peru.
Iceland
None. That point is in the Atlantic Ocean, about 475 miles west of Praia in the Cape Verde Islands, more than 900 miles off the coast of west Africa, and at least 1,300 miles from the nearest point on the coast of South America.
15S 115W is deep in the South Pacific Ocean, 900 miles north of Easter Island, 1800 miles SW of the Galapagos islands, 1200 miles NE of Pitcairn Island.
900 miles
900 miles
No One, The Galapagos Islands are some 600 odd miles (900 odd kms) from the nearest land.
Iceland is probably the answer you are looking for, though your distances are not accurate.
About 900 miles. Include the states next time.