Danube Itinerary: 4 Days from Passau to Vienna aboard the Riverside Mozart

"A simply incredible ship, with outstanding facilities... between the comfort of the suites, the four on-board restaurants and the view over the Austrian valleys gliding past along the water, this cruise exceeded all our expectations." These are the words Solène uses to describe her Danube river cruise aboard the Riverside Mozart, a 120-metre luxury river ship nicknamed the "Queen of the Danube". Twice as wide as conventional river boats, it remains one of the largest river cruise ships in Europe. In spring 2026, Solène boarded with her colleague Dylan for four days of cruising between Germany and Austria, from Passau to Vienna, as part of a familiarisation trip reserved for travel professionals. On board were a handful of agency advisers like them and around sixty guests, two captains taking turns at the helm, and a single common thread: the Danube, its spectacular locks and its timeless towns. To anyone wondering whether a Danube river cruise is worth it, the answer is unequivocal: yes!

In this article, I take you through Solène and Dylan's 4-day cruise from Passau to Vienna aboard the Riverside Mozart, between overnight sailings, the Wachau Valley, Austrian castles and daily excursions. A short, comfortable format, ideal for discovering the Upper Danube at the pace of an upmarket river cruise, without having to perform a single manoeuvre.

A cruise aboard the Riverside Mozart

Aboard the imposing Riverside Mozart, Solène and Dylan follow the thread of the Danube on this cruise between Germany and Austria. This luxury river cruise ship embodies a certain idea of cruising: space, refinement and high-end service. Operated by Riverside Luxury Cruises, it is the former Crystal Mozart, built in 1987, fully refurbished and returned to service on the Danube in 2023 after being bought by the Seaside Collection hotel group. At 120 metres long and, above all, 23 metres wide, it is almost twice the width of traditional river boats, which has earned it the nickname "Queen of the Danube". "We loved life on board straight away. Perfect comfort, plenty of space," sums up Solène. Far from the standardised river boat, this is a genuine floating hotel.

This exceptional width changes everything about life on board. Where most river boats play the intimacy card, the Riverside Mozart offers vast communal areas where you never feel cramped. Four restaurants, several lounges and bars, a panoramic sun deck: there is always somewhere to settle in. "We particularly liked the ship itself, with its many restaurants, as well as the view over the Austrian valleys," says Solène. The cuisine evolves, too, with the regions you pass through, from Austro-Hungarian recipes to more southern specialities, accompanying the journey on the plate as much as in the landscape.

But what strikes Solène and Dylan most, beyond the comfort, is the service. With an unusually large crew for this type of ship, the attention paid to passengers is constant. "The crew were very kind and attentive. They explained everything to us really well," says Solène. For Dylan it was a first time sailing; for Solène, a second river experience. In both cases, they found their sea legs immediately: on a cabin cruise (a fully crewed river cruise where everything is taken care of for you), no nautical skills are required, everything is handled by the two captains and their crew. All that remains is to enjoy it.

When it comes to navigation, the contrast with hiring your own sailing boat is total. Here, everything is done under engine, by day and by night, following a schedule designed to maximise time ashore. "We sailed by day and by night. One morning from 9am to 1pm under way, and the rest mostly at night," Solène explains. This approach means you wake up each morning in a new town, ready for the day's excursion, without losing an hour of sightseeing. A river cruise like this one perfectly illustrates what the Danube can offer travellers seeking comfort: discovering Central Europe along the water, without the slightest logistical constraint.

One organisational point that travellers appreciate: the all-inclusive formula. Meals in all four restaurants, drinks, excursions, concierge service... everything is included, which means there is no need to think about a single detail once on board. "We had excursions every day," Solène points out. As for access, boarding takes place in Passau (a Bavarian town at the confluence of the Danube, the Inn and the Ilz, nicknamed the "city of three rivers"): the easiest way to get there is via Munich, about an hour and a half away by train. Disembarkation in Vienna, close to the international airport, makes the return journey easy for passengers coming from all over Europe.

4-day itinerary from Passau to Vienna

Day 1: Arrival and boarding at Passau

The adventure begins in Passau, where Solène and Dylan board the Riverside Mozart. Both work in travel and are among the professionals invited to discover this ship, alongside around sixty guests. The first impression is striking: the space. Step aboard and you would think you were in a grand hotel rather than on a river boat, such is the scale of the vessel. Settling into the suites, a first look around, getting your bearings among the four restaurants and the decks.

The first evening unfolds quietly on board, around a welcome dinner, time to find your feet before the first leg. Two captains take turns at the helm to handle sailing by day and by night, entirely under engine, as river cruising requires. "We knew we would wake up somewhere else the next day. That is the whole charm of this kind of trip," says Solène. Heading east, on the Danube.

Day 2: From Passau to Grein (overnight sailing, about 145 km)

First night of sailing: the Riverside Mozart leaves Passau and travels down the Danube to reach Grein (a small Austrian town nestled in the Strudengau, one of the narrowest and most spectacular stretches of the river). This is the chance to discover what will remain one of the great impressions of the trip: the locks. "We remember the locks well, there were lots of them during the sailing, and it is quite impressive to see," Solène confides. Passing through these structures, where the ship rises or descends by several metres between two gates, is one of the highlights of a Danube cruise.

Once in Grein, it is time for the excursion. On the programme: a visit to the town and its theatre, the Stadttheater Grein (built in 1791, considered one of the oldest theatres in Austria still in operation). Excursions punctuate every day of the cruise, in fact: "We had one every day," Solène points out. In the evening, an outing is organised to Greinburg Castle (one of the oldest residential castles in Austria, largely built between the late 15th and early 16th centuries, overlooking the Danube from the heights of Grein), with a musical performance to round off the day in style.

Day 3: From Grein to Krems through the Wachau Valley (daytime sailing, about 75 km)

The next day, sailing continues towards Krems, this time with a fine daytime sequence. In the morning, from about 9am to 1pm, the ship crosses the Wachau Valley (a cultural landscape inscribed on the UNESCO World Heritage List, famous for its terraced vineyards, its abbeys and its villages along the Danube). It is one of the most beautiful stretches of the whole river, and these landscapes will have particularly struck the travellers: "We really loved the view over the Austrian valleys," says Solène, settled on the deck to enjoy the procession of hillsides.

In the early afternoon, the ship arrives at Krems an der Donau (a town at the eastern gateway to the Wachau, renowned for its medieval centre and its vineyards). The excursion offers a chance to discover the town and its surroundings, in the more peaceful, authentic atmosphere of the small Danube towns. "We really enjoyed being able to discover several little towns, it was very nice," Solène confirms. The evening is spent on board, before a final night of sailing towards the capital.

Day 4: From Krems to Vienna, free time and return (overnight sailing, about 75 km)

A final night of sailing to Vienna (capital of Austria and former imperial city of the Habsburgs, set on the banks of the Danube). The day is given over to free time in the city, a chance to wander at your own pace through one of Europe's most beautiful capitals, between baroque architecture, Viennese cafés and the grand boulevards of the Ring. Vienna is, moreover, the starting point of many Danube cruises departing from Austria, for those who wish to extend the experience towards Bratislava or Budapest. In the evening, a transfer to the airport and the end of this river cruise which, in four days, had linked Germany to Austria along the Danube.

Solène and Dylan are agreed: life on board was the real highlight of this trip. "We loved the ship itself, with its many restaurants, and the chance to discover several little towns along the water." A special mention goes to the crew: "Very kind and attentive, they explained everything to us really well." Enough to make you want to repeat the experience on another river itinerary.

How much does a Danube river cruise cost?

Budget is often the first question travellers ask. Unlike a boat hire, the price is expressed as an all-inclusive formula (cabin, full board, excursions and service) and depends mainly on three variables: the season, the length of the cruise and the suite category chosen. Here are some indicative ranges per person, observed in 2025-2026, for a short cruise (3 to 4 days) on the Upper Danube, in the premium segment of the Riverside Mozart type:

Good to know: on a cabin cruise, almost all services are included in the price, unlike a boat hire where provisioning, fuel or the deposit are added on. Prices climb quickly on longer itineraries: by way of comparison, a multi-day route linking Vienna, Bratislava and Budapest is more likely to be between €5,000 and €7,000 for a double cabin. For a precise quote based on your dates and preferred suite category, the easiest thing is to contact our advisers.

When to go on a Danube cruise?

The Upper Danube, from Passau to Vienna, enjoys a continental climate: hot summers, cold winters and two lovely shoulder seasons. The sailing season generally runs from April to the end of December, with each season offering a very different atmosphere. Here are the average daytime temperatures to help you choose your moment:

Our advice: to enjoy the Wachau in the best conditions, spring and early autumn offer the best balance between mild weather, spectacular landscapes and reasonable crowds. Summer will suit fans of warmth and long days, while the end of the year will appeal to those dreaming of Christmas markets along the water.

Please note: like any river cruise, sailing on the Danube depends on water levels. In the event of exceptionally high or low water, the itinerary may be adapted, or even certain sections replaced by a coach transfer. The cruise lines monitor these conditions closely and warn passengers in advance.

Cabin cruise or boat hire: which formula to choose?

The Danube can be discovered in two very different ways: aboard a river ship on a cabin cruise, like Solène and Dylan, or at the wheel of a self-drive river boat hire with no licence required, on your own. Here is a quick comparison to help you choose the formula best suited to your plans.

In summary: if your priority is comfort, service and discovery without any constraints, a cabin cruise on a ship like the Riverside Mozart is the ideal formula, as Solène and Dylan experienced. If you are above all looking for freedom and independence, at your own pace and with others, hiring a river boat with no licence required will be more relevant. To go further, discover our full range of river cruises along Europe's most beautiful rivers.

Highlights of the Passau to Vienna cruise

• Life on board the Riverside Mozart: without a doubt the highlight of the trip for Solène and Dylan. A ship twice as wide as conventional river boats, four restaurants, generous spaces and grand-hotel comfort. "Perfect comfort, plenty of space." You quickly settle into a routine here, between a meal facing the river and a moment of relaxation on deck.
• The view over the Austrian valleys: crossing the Wachau, its terraced vineyards and its waterside villages, will remain one of the most beautiful images of the trip. "We loved the view over the Austrian valleys." A UNESCO-listed setting that glides past from the deck, effortlessly.
• The Danube locks: numerous throughout the sailing, they struck the travellers with how impressive they are. "There were lots of them, and it is quite impressive to see." Watching a ship of this size rise between two gates is a spectacle in itself.
• The musical evening at Greinburg Castle: after discovering one of Austria's oldest theatres in Grein, the evening excursion to the castle, rounded off with a musical performance, is one of those moments that give a Danube cruise all its flavour, between culture and heritage.
• The daily excursions and the crew: an outing organised every day, and a crew of exemplary availability, taking the time to explain everything. "Very kind and attentive." It is this constant attention that turns a simple sailing into a genuine travel experience.

Fancy experiencing this cruise? Our Danube specialist advisers are here to build the ideal itinerary with you, to choose the right ship and the best dates. Do not hesitate to contact them for a personalised quote.

Acknowledgements

I would like to warmly thank Solène and Dylan for the time they devoted to our conversations, as well as for their detailed feedback on this river cruise from Passau to Vienna! It is thanks to testimonials like theirs that we can share with you the reality of a cabin cruise on the Danube, aboard an exceptional ship, and help you imagine your next journey along the river.