On a river cruise the single supplement runs anywhere from nothing to another whole fare, and which end you land on depends almost entirely on the line. Not the itinerary, not the season, not how early you book. The line. I walked more than a dozen river ships at the river cruise expo in Amsterdam this spring, one after another over two days, and the gap between how they treat a person traveling alone is wider than anything else that separates them.
So if you are traveling on your own, pick the line first and the river second. That is backwards from how everyone else shops, and it will save you more money than any other decision you make.
What the supplement actually is, and why it exists
River ships are small. A hundred and ninety guests is a big one. Every cabin is built for two, the fare is quoted per person based on two people in it, and the line’s costs barely change when only one of you shows up. So they charge the empty half of the room to the person who is there.
That is the whole mechanic. It is not a penalty for being single. It is the line refusing to sail a cabin at half revenue.
Which means the question is never “will they waive it.” It is “what has this line done to solve it,” and there are three different answers.
The three ways a line handles a solo traveler
A purpose-built single cabin. A real cabin, designed for one, priced for one, no supplement at all. These are rare and they sell out early.
A waived or reduced supplement on a regular double. You get a full two-person cabin to yourself and pay something between one fare and two.
Nothing. Pay the supplement, which on some lines is the entire second fare and on one line is more than that.
Knowing which of the three you are being offered matters, because the first two are different products and they get quoted to you as if they are the same thing.
Who has real single cabins
AmaWaterways is the one to know if you want a balcony. Purpose-built single staterooms at 140 square feet with a French balcony, on AmaCello, AmaDante, AmaDolce and AmaLyra. A French balcony on a solo cabin is unusual. On most ships the single is an inside-feeling room, and this one is not.
Scenic has one on each of its ten Rhine, Danube, Moselle, Rhône and Bordeaux ships, a Single Balcony Suite with the full sun lounge rather than a window. Scenic does not market these anywhere I can find, which tells you something about how quickly they go. I found them by counting. Every one of those ships carries an odd number of guests, exactly one fewer than twice its suite count, and that is only possible if one suite sleeps one.
Emerald has dedicated single staterooms on select Star-Ships, running 105 to 117 square feet, on the Danube, Moselle, Rhine and Rhône.
Amadeus has one per ship on Brilliant and Diamond, around 108 square feet. Amadeus is worth a second look for a solo traveler for a reason that has nothing to do with the cabin. Its fare already includes gratuities along with meals, wine and beer with dinner, wifi and port taxes, and it leaves excursions to be bought separately. If you have already done the standard walking tour of half these towns and would rather have the afternoon to yourself, that structure fits you better than a fuller package would.
Uniworld has one, on S.S. Catherine, at 120 square feet.
Two things to notice about that list. Every one of those cabins is smaller than the same line’s standard double, which runs 160 to 170 square feet on most lines and more than that on Scenic. And there are usually one or two per ship, which is why they go first.
Who waives the supplement instead
Avalon has no single cabins at all and solves it the other way, waiving the supplement on most Europe departures on Deluxe Staterooms and Panorama Suites. That is a real category, not a consolation room, which makes it one of the better deals out there for one person.
Tauck waives it on its entry category across its river season, which is the broadest standing offer in river cruising. The entry category is a lower-deck cabin with small high windows rather than a balcony, so you are trading the view for the price.
Scenic, Emerald and Uniworld all run waived or reduced supplements on selected departures. These come and go, they are not policy, and the sailings they apply to change. That is a reason to ask rather than to assume.
Riviera holds cabins without a supplement on selected departures, and it is doing something nobody else is doing. From the 2027 season it turns MS George Eliot, a ship already in its fleet, into the first river ship sailing solo travelers only. All 70 cabins go to one person, no couples aboard, which roughly halves the number of people on board. Rhine and Danube itineraries are on sale now. Whatever you think of the idea, it is the clearest signal yet that the lines have noticed how many people are traveling alone.
Viking is the one to know about
Viking is the name most people say first, and for a solo traveler it is the worst of the group. Cruise Critic puts Viking’s single supplement at 150 to 200 percent on most sailings, the highest in the industry, and Viking publishes no single cabins.
Read that number again. At 200 percent you are not paying double. You are paying double plus another half.
Viking does occasionally discount it, and Viking does not publish a percentage anywhere on its own site, so the figure is a trade estimate rather than a posted rate. But the shape of it is right, and it is the single most expensive mistake a solo traveler can make on a river, precisely because it is the line they walk in asking for.
If you want Viking specifically and you are traveling alone, I will tell you what it costs before you fall in love with the brochure. Sometimes people look at that number and book it anyway, which is a fine decision to make with your eyes open.
The catch with a waived supplement
A waived supplement is almost always on the lowest cabin category. Lower deck, small windows near the ceiling, no balcony. You do get a full two-person cabin to yourself, which is more space than a dedicated single, but you get it on the least desirable deck on the ship.
A dedicated single cabin is the opposite trade. Better position, sometimes a French balcony, less floor space.
So the two options are not interchangeable and the better one depends on what you actually care about. If you want to sit in your own space and watch the river go by, take the smaller cabin with the balcony. If you want room to spread out and you spend your days ashore and your evenings in the lounge anyway, take the bigger cabin on the lower deck. Nobody asks you which of those you are, and it is the first thing I ask.
How it compares to an ocean cruise
Briefly, because the answer is not close. The mainstream ocean lines typically charge 100 to 200 percent. Royal Caribbean, Holland America and Princess all have some dedicated solo cabins, on a handful of ships each, and they are small, around 100 to 130 square feet, and usually inside or with a virtual window.
The river advantage is not that the fare is lower, because it is not. It is that a waived supplement on a river ship hands you a full cabin with a view, and the ocean equivalent hands you a windowless room the size of a walk-in closet.
What it is like aboard on your own
Better than people expect, and the reason is structural. A river ship carries under 200 people, you see the same faces every day, dining is open seating at tables of various sizes, and the ship is small enough that you cannot really be anonymous on it. By day three you know people. That is not a program the line runs, it is just what happens on a vessel that size.
The lines that do the most for solo travelers tend to do it without advertising it. A cruise director who pulls the people traveling alone together on the first evening so nobody eats dinner by themselves. Tables set for three and five as well as four and six. Small things, but they are the difference between a week that feels solitary and one that does not.
Solo river cruise FAQ
Do river cruises charge double for one person? Some do, some do not, and one charges more than double. It ranges from no supplement at all on a dedicated single cabin to 150 or 200 percent on the most expensive line for solos. The spread between lines is bigger than the spread between itineraries, which is why the line is the first decision.
Which river line is best for solo travelers? It depends whether you want a real single cabin or a full double to yourself. AmaWaterways has the best purpose-built singles. Avalon waives the supplement on good cabin categories. Tauck has the broadest standing waiver. Tell me which matters more to you and I will narrow it.
Are single cabins on river ships smaller? Usually. Most run 105 to 140 square feet against a standard double of 160 to 170. The exceptions are the ones that kept a balcony. AmaWaterways’ singles have a French balcony and Scenic’s Single Balcony Suite has the full sun lounge, which changes how a small room feels more than the square footage does.
Can I get the supplement waived if I ask? Not by asking at the point of booking, no. The lines run waived and reduced supplement offers on selected departures, and they change. Knowing which are running, and on which sailings, is the part I do.
Is a river cruise a good idea if I have never traveled alone before? It is one of the better ways to start. The ship is small, the dining is communal without being forced, everything is included so you are not navigating a foreign menu every night, and you unpack once.
Let’s find the right one
Tell me the river you have in mind and whether you would rather have a balcony or the floor space, and I will come back with the sailings where a solo fare actually works, with the real number on each. If you are still deciding whether this kind of trip is for you, I wrote about what a river cruise fare covers separately. Otherwise, reach out and tell me what you are thinking.