The last episode of The Summer I Turned Pretty (TSITP) Season 3 is expected to be a supersized finale, roughly around 70–80 minutes long , but the exact official runtime hasn’t been firmly confirmed yet.

What we actually know

  • Prime Video hasn’t publicly locked in an official runtime for the finale.
  • Season 3 episodes “typically run about an hour,” and several have gone over that this season, especially the penultimate episode.
  • A popular entertainment site reported that the finale “appears” to be around 77 minutes , based on an email allegedly sent to creators invited to an advance Paris screening.
  • Another outlet notes that it’s still “not clear” how long the finale will be, only that past Season 3 episodes sit at roughly an hour.

So: you can safely expect something in the extended‑episode range (about 1 hour plus, likely closer to 1 hour 15+), but treat any precise minute count (like “77 minutes”) as strong speculation, not a fully locked official number.

What fans and forums are saying

  • Fan discussions and Reddit threads are widely circulating a 1 hour 17 minutes (77 minutes) figure for the finale.
  • Some users point out that previous “long” episodes included several minutes of credits, so the actual story time may be a bit shorter than the headline runtime.
  • Many viewers think the finale will be one longer-than-normal episode rather than splitting into additional episodes.

In short: expect an extra-long finale night, but be ready for the exact time to shift a little once it actually drops on Prime Video.

TL;DR: All signs point to the last TSITP episode being an extended finale (around 70–80 minutes, with many sources and fans converging on ~77 minutes), but there’s no 100% final, on-the-record runtime yet.

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