Uniworld Doubles Its Mekong Fleet in 2028, Part of 3-Ship Expansion
Uniworld Boutique River Cruises will add a second ship in Southeast Asia in 2028. The Mekong Mystique joins the Mekong Jewel in Vietnam and Cambodia, arriving alongside two European newbuilds, the S.S. Helen on the Danube and the S.S. Clara on the Rhine. The three additions bring Uniworld’s fleet to 22 vessels. Bookings for the 2028 season opened July 21.

The Mekong addition is the most competitive piece of the announcement. Capacity on that river is thin across the industry, and rivals are moving into it on the same timeline. AmaWaterways is bringing the 60-stateroom AmaMaya to the Mekong in 2027 as part of a plan to operate more than 50 ships by 2032. Going from one ship to two gives Uniworld enough frequency to publish a real departure calendar in Vietnam and Cambodia rather than a handful of dates a year, which is the practical difference between a niche offering and a bookable program.
Mekong Mystique
The Mekong Mystique will sail one itinerary exclusively, the Timeless Wonders of Vietnam, Cambodia & the Mekong route running between Ho Chi Minh City and Hanoi. Interiors draw on classic Indochine design, combining European architectural detail with natural materials.
“This is one of the most significant periods of investment and growth in Uniworld’s history,” said Ellen Bettridge, President and CEO of Uniworld Boutique River Cruises. “As demand for immersive travel continues to grow, every new ship we build allows us to continue raising the bar for luxury river cruising.”
S.S. Helen Joins the Danube Fleet
The S.S. Helen takes its name from Helen of Troy and draws on European classical antiquity rather than literal Greek styling. Uniworld describes the design concept as Mediterranean in character, built around the Greek idea of philoxenia, or hospitality toward guests.
Its featured itinerary is the 15-day Danube Grandeur, running between Belgrade and Nuremberg with calls in six countries. That puts the S.S. Helen on Uniworld’s longest-running European program, where the line already operates several Super Ships.
S.S. Clara Named for a Dutch Golden Age Painter
The S.S. Clara honors Clara Peeters, the 17th-century Flemish still-life painter. Interiors will pull from her work, with florals, layered textures and European craftsmanship.
The ship debuts on Holland & Belgium at Tulip Time, the Brussels-to-Amsterdam spring itinerary built around the Dutch bulb season. Tulip Time is one of the most capacity-constrained products in European river cruising. The window runs a few weeks in late March and April, and nearly every operator wants tonnage on the Rhine and Dutch waterways during it. Adding a ship to that season is a commercial decision as much as a design one.
Of the three new ships, S.S. Clara is the only one with renderings of its spaces. See a few of those below:



The Wider Fleet Race
Uniworld has been building at a steady clip. The 2027 lineup includes the Super Ships S.S. Audrey and S.S. Marlene, the Douro-based S.S. São Rafael, and the chartered expedition yacht Aqua Blu, operated with Aqua Expeditions on twice-yearly sailings in Asia. Counting the S.S. Emilie, which enters service this year, the line will have added eight ships across three consecutive delivery years.
The rest of the segment is moving too, though not uniformly. Viking has eight additional Longships due in 2027 and 2028, built with hybrid diesel-electric and battery systems. Avalon Waterways went the other way, skipping a 2027 debut while it waits for more clarity on alternative propulsion, with a new ship planned for 2028 instead.
Uniworld’s build strategy differs from Viking’s in a way that matters to buyers. Viking produces near-identical Longships at scale. Uniworld produces one-off Super Ships with distinct interiors, which caps how fast it can grow but keeps each vessel differentiated.
What Travelers Should Know
Uniworld has not released guest capacities, deck plans, shipyard details or specific debut dates for any of the three ships. Those typically follow closer to delivery.
Booking 18 months out is normal in river cruising and does secure the best suite selection on a new vessel. It also means locking in pricing on a season that has not been fully deployed. Anyone eyeing Tulip Time on the S.S. Clara should plan early, since that itinerary sells out well ahead of departure even on existing ships.

