What Happens When Booking.com's Unique Inventory Enters the Dataset?

Key Takeaways

• Booking.com-only inventory represents a significant share of supply in several markets, particularly across Europe.
• In countries such as Poland and Romania, Booking.com-exclusive listings generate a disproportionately large share of demand.
• U.S. markets show meaningful Booking.com supply, but exclusive inventory generally captures a smaller share of bookings than its share of listings.
• Adding Booking.com data gives hosts and investors a more complete view of market competition and demand.

Booking.com listings are now part of the AirDNA dataset, providing a more complete view of the global short-term rental market than ever before. Until now, our visibility into Booking.com inventory was largely limited to cross-listed properties that also appeared on Airbnb or Vrbo. What we couldn't fully see was the supply that exists only on Booking.com.

That missing inventory turns out to be more significant than many might expect. In some markets, Booking.com-only listings account for a substantial share of total supply and an even larger share of demand. In others, they represent a meaningful slice of the market that was previously hidden from view.

To understand where this inventory matters most, we analyzed Booking.com-exclusive supply across countries and markets around the world. 

The results reveal not only where Booking.com has its strongest foothold, but also how the relationship between supply share and demand share can provide a deeper understanding of platform adoption, market dynamics, and competitive positioning.

Mapping Booking.com's Hidden Inventory

Before diving into the data, it's worth defining what we mean by a "unique" listing. A listing is considered unique to a platform if it appears there and nowhere else, though many properties are cross-listed across multiple booking sites.

To understand where Booking.com-exclusive inventory matters most, we analyzed the top 50 countries, the largest U.S. markets, and leading international destinations. In some markets, Booking.com-only inventory represents a negligible share of supply. In others, it accounts for a meaningful portion of both listings and demand.

The markets where this inventory has the greatest impact are spread across multiple regions. Poland leads by a wide margin, with Booking.com-only listings accounting for roughly 30% of short-term rental supply and 42% of demand. Romania follows with 24% of listings and 35% of demand, while other standout markets include Argentina, Egypt, and Croatia.

Booking.com Supply Across The World

Looking first at the 10 largest short-term rental markets in the world, Booking.com-only inventory is concentrated primarily in Europe. Among the major markets, the United Kingdom has the highest share of listings that appear exclusively on Booking.com, followed closely by Spain, Germany, and Italy. France, Europe's largest short-term rental market, sits closer to the average of the remaining major nations. Beyond Europe, the share drops off quickly, with countries across North and South America reporting less than half the proportion of Booking.com-only listings.

When we rank countries by Booking.com-exclusive supply, the most striking feature is how globally distributed it is. The leaders span four continents, including Poland and Romania in Europe, Argentina in South America, Egypt, Kenya, and Morocco across Africa and the Middle East, and Sri Lanka and Georgia in Asia. Poland tops the list, with 30% of listings appearing only on Booking.com, followed by Argentina at 25% and Romania at 24%.

What ties many of these markets together is not geography but profile. Most are developing economies, and many are large, highly populated countries where Booking.com has long maintained a strong presence among travelers.

At the same time, Booking.com-exclusive supply is not limited to emerging markets. Both the United Kingdom and Spain report a 13% Booking.com-only share, highlighting that exclusive inventory represents a meaningful portion of supply even in some of the world's largest and most established short-term rental markets.

U.S. Markets with the Highest Share of Booking.com-Only Supply

Zooming in on the United States, Booking.com-only inventory appears across markets of very different sizes, which is part of what makes it notable. 

The highest concentrations are found in leisure and vacation destinations, led by Deep Creek, Maryland (16%), Hilton Head, South Carolina (14%), and Outer Banks, North Carolina and Destin, Florida (13%), followed by a cluster of markets including Gatlinburg, Tennessee; Gulf Shores, Alabama; Boone, North Carolina; Amelia Island, Florida; Maui, Hawaii; and Bend, Oregon in the 11% to 12% range.

These markets range from small resort towns to major vacation destinations, suggesting this isn't simply a quirk of smaller markets where a handful of listings can influence the data. Orlando, Florida provides a useful example. Although it doesn't rank among the top 10, 9% of its listings are unique to Booking.com. Given Orlando's size, that still represents a substantial amount of inventory.

The picture changes when we look at demand. Across these markets, the share of demand generated by Booking.com-only listings consistently trails their share of supply. Deep Creek's 16% share of listings translates to just 8% of demand, while Outer Banks' 13% share of listings accounts for 6% of demand. The same pattern appears across most of the markets in the analysis.

This suggests that while Booking.com-exclusive inventory represents a meaningful portion of supply, it generates a smaller share of bookings than supply alone would imply. One likely reason is the continued dominance of Airbnb and Vrbo in the U.S. short-term rental market. Cross-listing also plays a role, as listings that appear on multiple platforms benefit from greater visibility and exposure to a wider pool of travelers.

For hosts and analysts, the takeaway is clear: supply share and demand share should be viewed together. A large pool of exclusive inventory does not necessarily translate into a proportionate share of bookings, particularly in markets where cross-listed properties continue to dominate traveler discovery.

International Markets with the Highest Share of Booking.com-Only Supply

Drilling down into individual markets outside the United States reveals a similar picture, with Booking.com-exclusive supply spread across nearly every region. Constanta, Romania tops the global list, where 38% of all listings appear only on Booking.com, followed by Mar del Plata, Argentina (29%) and Gdansk, Poland (27%).

Romania and Poland both rank highly at the market and country levels, while the United Kingdom appears twice in the top rankings, with the Lake District, England at 25% and Norfolk, England at 20%. Beyond these markets, the leaders span Egypt, Serbia, Kenya, Albania, and Brazil, highlighting the global reach of Booking.com-exclusive inventory. Notably, no Asian market appears in the top rankings.

Two markets also stand out for another reason. In most destinations, Booking.com-only listings account for a larger share of supply than demand. Constanta and Norfolk reverse that pattern. In Constanta, Booking.com-exclusive listings represent 38% of supply but generate 41% of demand. In Norfolk, a 20% share of supply translates to 21% of demand.

In both markets, Booking.com-exclusive inventory isn't just present—it's outperforming its share of listings. That makes them notable exceptions to the supply-above-demand pattern observed across most other markets in the analysis.

Comparing Airbnb, Vrbo, and Booking.com Exclusive Supply

Looking at all three platforms side by side provides a different perspective on the market. Airbnb-only inventory leads in every country in the analysis, although the size of that lead varies considerably. In markets such as the Philippines, Mexico, and Brazil, a large majority of listings appear exclusively on Airbnb, with relatively little inventory unique to either Booking.com or Vrbo. Elsewhere, including the United States, Spain, Italy, and Germany, Airbnb still leads, but the distribution of exclusive supply is more balanced across platforms.

One important caveat is that these figures only capture inventory unique to a single platform. They do not represent the full market, as a significant share of listings are cross-listed across two or more online travel agencies (OTAs) and are therefore excluded from any platform's exclusive share. A low Airbnb-only share does not mean Airbnb has a small presence in a market—it simply means fewer listings appear there exclusively. These figures show where exclusive supply lives, not the total footprint of each platform.

With that context in mind, several markets stand out. The United Kingdom, Spain, and Croatia have the highest Booking.com-only shares in the analysis, indicating a stronger exclusive Booking.com presence than most other markets. Vrbo-only inventory, by contrast, is concentrated primarily in the United States and Germany and remains in the low single digits across most other countries.

Germany is perhaps the most balanced market in the analysis, with exclusive supply distributed relatively evenly across Airbnb, Booking.com, and Vrbo rather than concentrated on a single platform.

Where Booking.com Drives the Most Demand

Listing share is only half the story. A platform can have a large pool of exclusive inventory, but what ultimately matters is how much booking activity that inventory generates. Looking at the trailing twelve-month share of demand from Booking.com-only listings reveals a different picture in many markets.

Where demand share exceeds listing share, it points to stronger Booking.com adoption. These listings aren't just present in the market—they're generating a disproportionate share of bookings. Poland is the clearest example, where 30% of listings unique to Booking.com account for 42% of demand. Romania follows a similar pattern, with 24% of listings generating 35% of demand. The same trend appears in Denmark (15% of listings, 21% of demand), Austria (15% and 19%), and Finland (14% and 18%).

What stands out most is how much more European the demand rankings look than the supply rankings. The markets where Booking.com-exclusive inventory punches above its weight are almost entirely European. Poland, Romania, Denmark, Austria, Finland, Croatia, the United Kingdom, and Belgium all record demand shares that meet or exceed their share of listings.

Several non-European markets tell the opposite story. Argentina, for example, has a high 25% Booking.com-only listing share, but those listings generate just 14% of demand. Kenya shows a similar pattern, with 18% of listings translating to only 10% of demand.

Taken together, the supply and demand views provide a more complete picture of Booking.com's market position. A large share of exclusive inventory does not always translate into a large share of bookings. Where the two diverge, they reveal far more about platform adoption and traveler behavior than either metric can on its own.

Why More Complete Market Data Matters

It's worth being clear about what changed and what didn't. Even before Booking.com entered the dataset, much of this supply and demand was already visible through cross-listed properties that also appeared on Airbnb or Vrbo. What was missing was the inventory that exists only on Booking.com. Adding it doesn't fundamentally change the picture so much as sharpen it. The market was always there; now more of it is visible. In countries such as Poland, Romania, and the United Kingdom, that added visibility is significant.

For hosts, the practical benefit is better benchmarking. In markets where a meaningful share of listings exist only on Booking.com, relying on Airbnb comparables alone means working with an incomplete view of the competitive landscape. Channel-exclusive listings often have different booking patterns, lead times, and average daily rates. Including Booking.com-only inventory creates a more representative comp set and a more accurate view of local market performance.

For investors and analysts, fuller coverage means better inputs for market sizing, forecasting, and underwriting decisions. It also highlights an important strategic signal: the relationship between supply share and demand share can reveal which platforms travelers actually use. In markets where Booking.com-exclusive inventory generates a disproportionate share of bookings, such as much of Europe, listing on Booking.com may play a meaningful role in a distribution strategy. In markets where exclusive supply accounts for relatively little demand, booking activity is likely concentrated elsewhere.

Viewed together, supply share and demand share do more than describe a market. They help reveal how travelers book, where platform adoption is strongest, and where cross-listing may offer the greatest advantage.

Frequently Asked Questions

What is a Booking.com-only listing?

A Booking.com-only listing is a property that appears exclusively on Booking.com and is not cross-listed on Airbnb, Vrbo, or another major online travel agency (OTA).

Which countries have the highest share of Booking.com-exclusive inventory?

Poland, Argentina, and Romania rank among the countries with the highest share of Booking.com-only listings. Several other European markets, including the United Kingdom and Spain, also have a significant concentration of exclusive Booking.com supply.

Does a larger share of Booking.com listings always mean more bookings?

Not necessarily. In some markets, Booking.com-exclusive listings generate a larger share of demand than their share of supply would suggest. In others, they account for a significant portion of listings but a smaller share of bookings. Comparing supply share and demand share provides a clearer picture of platform adoption.

Why does adding Booking.com data matter?

Including Booking.com-exclusive inventory provides a more complete view of supply and demand. For hosts, that means more accurate benchmarking and pricing decisions. For investors and analysts, it creates a clearer picture of market size, competition, and traveler booking behavior.