Jajce is one of those Balkan destinations that rewards travelers who happen to be passing through and punishes those who make a long detour to reach it. The waterfall, the fortress, and the Pliva Lakes are genuinely impressive, but the town is not a standalone destination in the way Sarajevo, Mostar, or Ohrid are. Whether it belongs in your itinerary depends almost entirely on your route.
When Jajce fits naturally
Jajce sits on the route between Sarajevo and Banja Luka, and between Banja Luka and the northwest Bosnia border crossings toward Croatia. If your itinerary is moving through this part of Bosnia for any reason -- heading toward Split via the northern route, connecting between Bosnia and Croatia without going through Mostar and the south -- then Jajce is a natural stop that adds very little extra time or cost.
It also fits naturally as a day trip or overnight extension from Sarajevo for travelers who want to see more of Bosnia beyond the Sarajevo-Mostar axis. The bus journey is about 2.5 to 3 hours each way, which makes it a long but manageable day trip or a comfortable overnight.
When it is not worth the detour
If the wider route does not pass through northwest Bosnia, adding Jajce requires a significant detour. Coming from Sarajevo just for Jajce and returning, or routing through it when the natural path goes south toward Mostar and Dubrovnik, adds travel time that the town does not fully justify. Jajce is excellent for what it is, but it is not at the level of Mostar, Kotor, or Ohrid where a specific detour is clearly worth making.
What makes Jajce worth the stop
The Pliva waterfall is genuinely striking -- a wide cascade dropping into a gorge in the middle of a small town, surrounded by Ottoman-era buildings and a medieval fortress on the hill above. It is unusual enough to be memorable rather than generic. The fortress gives strong views over the surrounding landscape. The Pliva Lakes and watermills a few kilometers outside town are among the most photographed scenes in Bosnia and worth the short trip out.
The town itself is quiet and largely untouristed compared to Mostar or Sarajevo. That off-the-beaten-path quality is part of the appeal for some travelers -- Jajce has not been packaged and presented for tourism in the way the bigger Bosnian destinations have. The experience feels more accidental and authentic as a result.
The honest verdict
Add Jajce if the route goes through northwest Bosnia, if you have already seen Mostar and want a different Bosnian experience, or if you are specifically interested in less-visited destinations. Skip it if the route does not naturally pass through and you are choosing between it and a stronger primary destination. The waterfall deserves to be seen -- just do not build a long detour around it.