Crossword clues for the word: IAD The word IAD has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for IAD Showing 1 to 7 of 7 results Clue(s) "Stresses strongly, as a point" Alternative airport to DCA or BWI Apple device plug? First year on calendar. Local airport's code Start of the Christian era The year one.