walk on clouds

• to tread on air

• to walk on clouds

• to be in the seventh heaven

(from Idioms in Speech)

to be exceedingly happy

Who is this young woman who goes out stealthily like this, and meets a young man, and comes back feeling as if she had been treading on air? (J. Galsworthy)

The execution of this arrangement so thrilled Tollifer that he felt as though he were walking on air. (Th. Dreiser)

They motored up, taking Michael Mont, who, being in his seventh heaven, was found by Winifred very amusing. (J. Galsworthy)

Who is this young woman who goes out stealthily like this, and meets a young man, and comes back feeling as if she had been treading on air? (J. Galsworthy)