Disney à la française — Americans mob Disneyland Paris as they hunt for a cheaper fairy tale getaway

And this phenomenon appears to be getting more common. The Parisian parks also reached capacity in September, according to the Post.

One theory for this frenzy in France is that so many Americans are taking up space. While a new “Frozen”-themed area is certainly a big draw, more Americans seem to be running the numbers and discovering it makes financial sense to experience that Disney magic across the Atlantic.

A previous Fortune report crunched the numbers for a family of four traveling from New York during spring break, and the total cost (including airfare, hotels and park tickets) came to $6,669 for a trip to Paris. By comparison, the same trip to Walt Disney World would cost about $6,975 in total (even given the cheaper airfare).

The New York Post had a similar estimate at $7,000 for an Orlando trip versus $6,700 to go to Paris.

But before saying “Oui” to la magie à Paris, there are a few nuances to consider.

Will your wallet really be happier at Disneyland Paris?

Calculating a Disney vacation isn’t advanced math — but it’s far from a straightforward estimate. With so many add-ons, bundles and fluctuating prices depending on when and which park (or parks) you’re visiting, it’s hard to say flat-out that France will always be the cheaper option.

That said, Disneyland Paris tickets are typically lower than comparable passes for U.S. parks.

A quick search on the Walt Disney World website shows a one-day, one-park ticket is now hovering around $200 for the rest of this year. For a one-day ticket to Disneyland Paris, you can snag a two-park pass for around the same price during busier seasons like Christmas, or closer to $120 on non-peak days.

As you start exploring more multi-day passes and promotions, it’s fair to say it’s more affordable to get onto Main Street in Marne-la-Vallée.

What makes it even less attractive for domestic parks is that Disney announced this month it will raise prices yet again starting late next year. According to CNN, not every ticket type will go up, but many premium experiences, skip-the-line privileges and some “peak time” tickets will see a bump. For instance, one-day, one-park tickets at “peak times” such as Christmas will go up to $229 at Walt Disney World.

Just note that transit, food and lodging rates have to be significantly lower for this “Disneyland Paris hack” to work, since international airfare will eat up more of the total budget. Currently on Google Flights, a roundtrip price from New York to Paris for two adults and two children this December is around $4,000. By contrast, a roundtrip flight to Orlando would be about $1,500.

Moneywise reached out to Walt Disney World for further comment, but we didn’t hear back by publication.

Princesses still have pricing power

Even if it makes more sense to see Tinker Bell near the Tuileries, that isn’t stopping people from visiting the domestic parks.