The Lower Danube is the river cruiser’s road less traveled. Below Budapest, the Iron Gates cut through the mountains, and ports such as Belgrade, Vidin and Bucharest take the place of Vienna and Passau.

While the upper portion of the Danube is hardly foreign to river cruisers, with many cruise companies anchoring itineraries in Budapest, heading downriver from the Hungarian capital one starts to see the disparity between West and East.

The Lower Danube technically starts at the Iron Gates, with the section between Devin Gate (at the border of Austria and Slovakia) and Iron Gate considered the middle Danube. (This is the watery intersection for the Danube’s major tributaries, such as the Drava, the Tisza and the Sava.) But for all intents and purposes, anything south of Budapest is off the beaten path for the traditional river cruiser, and that is the stretch I mean when I write about the Lower Danube.

The Danube is full of locks, 70 of them to be exact, and you’ll transit 18 on the popular stretch between Passau and Budapest alone. While these locks are certainly interesting engineering feats, I love the freedom of sailing open and unadulterated waters. That’s exactly the sense you’ll get on the Lower Danube, where nature and even architecture feel decidedly untouched.

Sailing through only two locks feels uninhibiting, despite the name of the most famous: the Iron Gates. In this gorge you’ll cruise along the watery border between Serbia and Romania, enclosed by rocky cliffs for about 83 miles. It feels as though the earth has parted just wide enough for you to pass. It’s stunning.

What makes this final stretch toward the Black Sea so memorable are the destinations ashore, including Osijek, Croatia; Belgrade, Serbia; Vidin and Belogradchik, Bulgaria; and Bucharest, Romania. River cruising is the ideal way to experience places you might not book a weeklong land vacation to visit but that prove incredibly fascinating, with the river leading you to the doorstep of the nation’s most iconic sights.

Who sails the Lower Danube

Itineraries here are fewer than on the Upper Danube, and many run 10 nights or longer. For 2027, lines sailing this region include Viking, which runs between Budapest and Bucharest; Tauck, with a 13-day journey from Bucharest to Budapest; Riverside Luxury Cruises, with a 10-night sailing from Budapest to Belgrade that passes through the Iron Gates; and Riviera River Cruises, with a 14-night sailing from Budapest to the Black Sea. Schedules change from year to year, so confirm dates before you plan around a particular ship.

What does a Lower Danube cruise cost?

Only a handful of lines sail here, and their itineraries vary widely in length and route, so a chart that lines them up side by side would mislead more than it would help. Use our Danube guide as a baseline instead. In our latest charts, sample 7-night Danube sailings for 2027 run from about $380 to $842 per person per night.

Expect Lower Danube sailings to run longer and offer fewer departures than a weeklong Upper Danube cruise. Compare the total price and what’s included for the exact dates you want, including port charges, gratuities and shore excursions. If you would like help sorting through the options, ask us for personal recommendations.

Keep exploring

See how the rivers compare in our True Per Diem price comparison, or read about sailing the Rhine, Main and Danube from Amsterdam to Budapest.