Instead of choosing the "fantasy" life of domesticity with Abbas and Nadiya, Hanna decides she must start over alone to escape her past trauma.
Hanna season 3, episode 6 recap - the ending/finale explained Hanna - Season 3Eps6
As she walks toward her flight, the musical motif "Anti-Lullaby" plays, symbolizing her survival and the heavy burden of her past. Deep Themes & Analysis Instead of choosing the "fantasy" life of domesticity