The length of your campaign largely depends on how much time you spend in the "meat" of the adventure: the jungle hexcrawl and the final dungeon.
How long do your players love shopping and political intrigue? tomb of annihilation how many sessions
Let’s look at how long it took real groups: The length of your campaign largely depends on
2–4 sessions. Groups usually spend this time meeting guides, racing dinosaurs, and gathering supplies. Jungle Hex Crawl: tomb of annihilation how many sessions
“Day 34. The jungle is a green hell that never ends. We buried Elara yesterday – a swarm of killer vines pulled her into the canopy before we could even draw steel. Our guide, Salida, says we’ve covered barely a third of the peninsula. At this rate, we’ll be bones before we find this legendary tomb.