Castle in the Air

A castle in the air is a daydream or fantasy.

Castle in the Air may refer to:


 * Castle in the Air (play), a 1949 play by Alan Melville
 * Castle in the Air (film), a 1952 British comedy film based on the play
 * Castle in the Air (novel), a 1990 young adult fantasy novel by Diana Wynne Jones
 * the Castle in the Air, in the children's book The Phantom Tollbooth, where the princesses of Rhyme and Reason are banished