On the right side panel of the sarcophagus the farewell of Protesilaus and Laodamia is depicted in the presence of Hermes Psychopomp, the guide of the souls of the deceased to the underworld. The figure of Hermes on the right, in winged sandals and holding a caduceus, is identical to the one on the frontal panel. In the center of the composition Protesilaus addresses his final words to Laodamia. Laodamia stands with her veiled head bowed; in her right hand she holds a dagger, and himation in the left hand. Unlike the scene of the couple’s reunion, where she joyfully looks into Protesilaus’s eyes, here her gaze is directed into emptiness, the gaze of a person who has already decided to bid farewell to life: she is experiencing the last moments before death.
Between the figures of the spouses, a small winged Eros raises his right hand in a farewell gesture.

The source of the plot for this relief was probably Pseudo-Apollodorus’s "Epitome" (E. IV 3. 30), which tells us that "...when he (Protesilaus) was led back to Hades, she (Laodamia) committed suicide." The original text does not contain a direct indication of the method of Laodamia’s suicide (ἑαυτὴν ἐφόνευσεν), however, the verb φονεύωused by the author is more often applied to denote bloody methods of killing (slaughter, bloodshed). This is precisely how the ancient author of the relief envisioned Laodamia’s suicide, and it is this connotation of φονεύω that the renowned British religious scholar J.G. Frazer chose when translating Apollodorus’s "Library" into English ("...she stabbed herself to death").