Crossword clues for the word: FLATFEE The word FLATFEE has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for FLATFEE Showing 1 to 5 of 5 results Clue(s) "Charge for unlimited use, say" Fixed charge Fixed service charge: 2 wds. Hourly-rate alternative Payment that won't change