Tom Madsen (Dutch Harbor) Airport — Unalaska, United States

DUT, the Tom Madsen (Dutch Harbor) Airport, serves Unalaska in Alaska's remote Aleutian Islands, one of the busiest fishing ports in the United States. The airport is notoriously challenging, with a short runway squeezed between mountains and water, requiring specially trained pilots and often featured in documentaries about extreme aviation. It is a critical lifeline for the seafood processing industry centered on Dutch Harbor, ferrying crab and fish workers, supplies, and freight to and from mainland Alaska since no road connects the island. Weather delays are common due to fierce Aleutian winds and fog. Named for a longtime local pilot, DUT remains essential infrastructure for one of America's most isolated working communities.