What is the world record for 3.5 miles?

3.5 miles is not an official race distance for a world record. The closest is 3.1 miles or a 5k, for which the world records are:

Mens: Kenenisa Bekele, 12:37.35, Ethiopia, 2004

Womens: Tirunesh Dibaba, 14:11.15, Ethiopia, 2008