A stairway (set of steps) between one floor or landing and the next(noun)
WordNet. Princeton University. 2010.
Use "flight of steps" in a sentence
"Navy Building and he ran up the wide flight of steps into the building."
"She thrust the trailing coat and umbrella apologetically at the bemused hostess and walked jerkily towards the short flight of steps that led down to the fan of tables, tucking the beaded clutch bag into the crook of her elbow as she surveyed the glittering throng with a glazed expression that contained a curious combination of desperation and determination."
"To unload his purchases it was necessary to make several trips up the long flight of steps — with the ottoman, the supply of liquor, the turkey roaster, his new radio, Polly's batwing cape, three dozen candles, four coffee mugs, and a very heavy iron candelabrum."