How do you say bye in German?

Answer 1

There are various ways of saying bye in German:

Formal:

Auf wiedersehen

Auf wiederhören (only used when on the phone)

Informal:

Tschüß

Adé

Pfürti

Servus

Answer 2

Bye Bye is tschüss, if you mean a friendly saying when parting ways. If you are holding a small child in your arms trying to make him wave and say bye-bye, it's sag winke-winke. If you mean bedtime, it's heia machen in German.

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The expression tschüß is used mainly (but not exclusively) north of the River Main. In southern Germanz the expressions ade and servus are far more common