For $n \leq 6$, we describe the stable pair compactification $\overline{Y}_c^n$ of the moduli space $Y_c^n$ of log canonical pairs $(S,cB)$ such that $S$ is a smooth del Pezzo surface of degree $9-n$, $B$ is the (labeled) sum of its finitely many lines, and $c \in (0,1]$ such that $K_S+cB$ is ample. When $c=1$ or $c$ is minimal, this compactification has been described previously by work of Hacking-Keel-Tevelev, and Gallardo-Kerr-Schaffler. We establish the full sequence of wall crossings as one decreases $c$ from 1 to the minimal weight. Our results include a complete description of the fibers of the universal families.