The original animated Lilo & Stitch movie from 2002 is about 1 hour 25 minutes long (85 minutes).

Since you wrote “the Lilo and Stitch movie” without specifying, most people online mean the 2002 animated film, so that 85‑minute runtime is the usual answer.

For context, the newer 2025 live‑action Lilo & Stitch runs 1 hour 48 minutes (108 minutes), which is 23 minutes longer than the original.

TL;DR: Lilo & Stitch (2002) = 1h 25m; Lilo & Stitch (2025 live‑action) = 1h 48m.

Information gathered from public forums or data available on the internet and portrayed here.