Ottawa/Rockcliffe Airport or Rockcliffe Airport, a former military base, is a non-towered airport located on the south shore of the Ottawa River, 4 nautical miles northeast of Downtown Ottawa, Ontario, Canada. The airport is the home of the Canada Aviation and Space Museum, which owns the field, and is used and maintained by the Rockcliffe Flying Club. In August 2018, on the 100th anniversary of its use as an airfield, it was officially recognized as Canada's oldest active airport.