Answer: staircases

AnswerCrossword Clue
STAIRCASES

Some flights

STAIRCASES

Certain flights

STAIRCASES

Level connectors

STAIRCASES
Ways up
STAIRCASES
They have their ups and downs
STAIRCASESFlights of steps.
STAIRCASESUp-down places at school.
STAIRCASESPerrons
STAIRCASESThings that may wind down