William E Koenig Airport

William E Koenig Airport is an airport located in Dow Illinois, US. The ICAO code is 01IS, used by air traffic control and pilots for flight planning.

The airport operates in the America/Chicago timezone. When planning flights to or from 01IS, use our flight duration calculator to account for timezone differences, especially for international travel.

William E Koenig Airport sits at an elevation of 670 feet (204 meters) above sea level.

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