Pasaje de vuelta translates to "return ticket." While seemingly simple, it's a powerful phrase in this song, symbolizing a definitive break from the past.
Daniela Spalla sings, "Sin pasaje de vuelta," meaning she wants to embark on a journey without any intention of returning to her old life or the pain associated with it. This phrase encapsulates the song's theme of escape and moving forward, making it a memorable and emotionally resonant choice.
"Viaje a la Luna" turns a breakup into an actual flight plan. Daniela Spalla wants to leave without a return ticket — "Sin pasaje de vuelta" ["Without a return ticket"] — climbing high enough that the bad memories get lost in the air along the way. Carlos Sadness picks up her same wish from the other side of the call: today his world is incomplete, and even though it won't fix anything, he wants to get away from what's real — "Quiero alejarme de esta realidad" ["I want to get away from this reality"].
Neither of them is actually boarding anything. The moon just stands in for anywhere far enough that an ex stops being the whole story. What starts as one person's private escape plan turns into a duet, because getting over someone apparently needs company even when the whole point is running from everyone.