Imagine booking a Mediterranean cruise because you've always wanted to visit Santorini, Dubrovnik and Venice. You've researched the restaurants, planned your days ashore and spent a small fortune on the cabin. Then, a few weeks before departure, an email arrives. Santorini's out. Dubrovnik's gone. Venice has been replaced by somewhere you've never heard of.

Your cruise is still going ahead, apparently. Just not the one you thought you'd booked.

Cruise lines have considerable freedom to change their itineraries, sometimes for very good reasons. But that freedom isn't unlimited, particularly for British holidaymakers protected by UK package-travel law.

We examined the booking conditions of major operators alongside the legislation to find out what cruise passengers are actually buying, and when a disappointing change of plans becomes grounds for a refund.

Can a cruise line change your itinerary after you've booked?

Yes, and the right to do so is written into most cruise contracts.

P&O Cruises, for example, defines the itinerary in its booking conditions as a proposed route. Its terms allow alterations before departure where reasonably necessary for operational, commercial or other reasons.

Royal Caribbean's UK conditions also distinguish between significant and minor changes. Replacing one port with another is given as an example of a minor alteration, as is substituting one day in port with a day at sea.

Replacing two port days with two sea days, however, is specifically identified as a potentially significant change. That distinction is rather important if you've booked a cruise to see somewhere other than the ship.

It also reveals how differently a passenger and a cruise operator might view the same change. Losing the one destination you've spent years dreaming about may feel catastrophic, but the company might regard it as a relatively minor adjustment to an otherwise unchanged holiday. 

What does UK law say about cruise itinerary changes?

The key protection comes from the Package Travel and Linked Travel Arrangements Regulations 2018.

Contrary to what their name might suggest, these rules aren't limited to traditional holidays combining flights and hotels. A cruise including transport and overnight accommodation can itself qualify as a package, and major operators including P&O Cruises and Royal Caribbean explicitly recognise the relevant package protections in their UK booking conditions.

Under Regulation 11, an organiser generally can't make a unilateral change before departure unless the contract permits it, the change is insignificant and the passenger is properly informed.

If a main characteristic of the holiday must be altered significantly, the passenger has stronger rights. They can accept the change or terminate the package without paying a cancellation fee. An alternative package may also be offered. Where the passenger chooses to cancel under these provisions, the organiser must refund the payments within 14 days.

The crucial word is significantly. Missing one port on a week-long itinerary won't necessarily meet that threshold. Replacing most of the advertised destinations, particularly where those destinations formed the main attraction of the holiday, presents a considerably stronger argument.

ABTA's guidance recognises that an itinerary change omitting a principal advertised destination or event can amount to a significant alteration. But there's no universal rule that losing a particular number of ports automatically entitles every passenger to cancel. The overall character of the holiday matters.

What do cruise-line booking conditions actually promise?

Reading cruise booking conditions isn't an obvious way to spend an enjoyable afternoon. Nevertheless, the differences between operators are revealing.

P&O Cruises says passengers affected by a significant pre-departure alteration can accept the revised holiday, choose a comparable alternative if available or cancel for a full refund.

Royal Caribbean offers similar options for significant changes, while expressly classifying several common port substitutions as minor. So the rights aren't necessarily triggered by the same circumstances on every cruise.

It's worth examining the exact version of the booking conditions that applies to your reservation, particularly if the ports are your principal reason for travelling. A cruise line's definition of a minor change is useful evidence of its contractual position, but it doesn't automatically settle whether that change is legally insignificant. Your statutory rights can't simply be removed by an ambitious paragraph in the small print.

And if you've booked through a travel company that has assembled its own package, rather than directly with the cruise operator, check who your contractual organiser is. That determines who is responsible for the package and whom you should approach if something changes.

What happens if your cruise changes itinerary after departure?

This is where the distinction becomes particularly interesting. Before departure, you might be able to reject a significantly changed holiday altogether. Once you're onboard, your rights operate differently.

P&O Cruises' conditions state that the operator doesn't guarantee every advertised port will be visited. Yet those same conditions also recognise its obligation to provide suitable alternatives if a significant proportion of the package can't be delivered.

Regulation 15 of the UK package-travel rules requires organisers to offer appropriate alternative arrangements, without extra charge, when a significant proportion of the contracted services can't be provided. Where the alternatives are of lower quality, an appropriate price reduction may be due.

Regulation 16 also provides for price reductions where contracted services haven't been performed properly, with separate provisions covering compensation for resulting losses. But neither provision means every missed port earns passengers an automatic payout.

If a storm makes entering a harbour unsafe, the captain may have little choice but to continue sailing. Unavoidable and extraordinary circumstances can exempt an organiser from paying compensation for damages, although that doesn't necessarily eliminate a passenger's right to an appropriate price reduction where contracted services haven't been provided.

The distinction matters: a price reduction addresses the value of services not properly delivered, while compensation can concern additional losses caused by the failure. They aren't interchangeable, and the circumstances determine whether either is payable.

A captain who refuses to sail into dangerous weather is doing precisely what passengers should want. Whether the holiday still represents what they paid for is a separate question.

Can you claim a refund if your favourite cruise port is cancelled?

Possibly, but how strongly you can argue your case depends on the circumstances.

Suppose you've booked a seven-night cruise with five Mediterranean ports. One is substituted several months before departure, leaving the overall journey substantially unchanged. That would generally be a weaker basis for rejecting the holiday without penalty.

Now imagine an advertised Greek islands cruise being transformed into a voyage calling almost exclusively at Italian ports. The ship, dates and cabin might remain identical, but the geographical character of the holiday has changed substantially.

That could support an argument that the organiser has made a significant alteration under package-travel law.

The situation becomes more complicated if you've booked specifically to visit one destination. Its loss may be personally devastating, but your reason for choosing the holiday doesn't necessarily make the change legally significant. It will help if the destination was a principal advertised feature of the package, or if a particular requirement was expressly agreed with the organiser.

Citizens Advice recommends checking both the original booking information and the proposed changes before deciding whether to accept a replacement holiday or seek a refund.

Can you get compensation for missed cruise ports?

Sometimes, although it's worth approaching any claim with realistic expectations.

Where a cruise operator fails to deliver contracted services and the failure isn't adequately remedied, passengers may have grounds for a price reduction or compensation under the Package Travel Regulations.

Compensation for damages isn't generally payable where the failure results from unavoidable and extraordinary circumstances, such as sufficiently severe weather. But where changes result from factors within an operator's control, the position may be different.

Citizens Advice also distinguishes between the reduced value of a holiday, additional expenses and loss of enjoyment when considering compensation claims.

If you're offered onboard credit following a missed port, check whether it's a goodwill gesture or a proposed settlement of your complaint. You're not necessarily required to accept credit instead of a refund or price reduction to which you're legally entitled.

It also pays to keep expectations proportionate. Missing an afternoon in one destination doesn't ordinarily justify demanding reimbursement for an entire fortnight at sea, however persuasive your argument that the substitute port lacked charm.

What should you do if your cruise itinerary changes?

If you're notified before departure, compare the revised itinerary with your original booking confirmation and save copies of both. Check the applicable booking conditions, particularly the sections dealing with significant alterations and cancellation.

If the changes fundamentally affect the holiday, contact the organiser in writing. Explain which advertised features have been removed, why the replacement differs materially from what you booked and what remedy you're seeking. Don't simply cancel through the usual booking process, as this could trigger standard cancellation charges.

The organiser should explain your options and provide a reasonable period for you to respond to a significant change. Under the package-travel rules, those options can include accepting the alteration or cancelling without a fee.

If the changes occur during the cruise, raise the issue with Guest Services while you're still onboard and request written confirmation of the affected ports and the reasons given. Keep records of any additional expenses and follow the operator's complaints process afterwards.

If you're unable to resolve the matter directly, organisations such as Citizens Advice can explain your consumer rights, while ABTA's complaints and dispute-resolution services may be relevant if the company is a member.

Travel insurance may cover certain itinerary disruptions, but policies vary considerably. A cruise operator suggesting you contact your insurer doesn't necessarily mean it has no responsibilities of its own.

So, are you really booking the itinerary you see advertised?

Broadly, yes, but with an understanding that the route may change.

Cruise operators need flexibility to respond to weather, port closures, safety concerns and the realities of operating enormous vessels across international borders. Nobody benefits from a captain attempting to reach Santorini at all costs because several hundred passengers have restaurant reservations.

But that operational freedom exists alongside contractual promises and legal protections. The itinerary is part of what makes a cruise attractive, and significant changes to it can materially alter the holiday being sold.

The practical lesson is to read the booking conditions before paying your deposit, particularly if you're choosing a cruise for one or two specific destinations. Check what constitutes a significant change, who is responsible for the package and what remedies are available if the advertised route disappears.

A little attention to the small print before departure could save a rather more substantial argument afterwards.

And if a cruise line replaces your long-awaited visit to Venice with an additional afternoon at sea, you're entitled to be disappointed. Whether you're also entitled to your money back depends on rather more than how much you'd been looking forward to the gondolas.