The most popular cities in Portugal for international travelers are Lissabon and Porto. In 2018, Lissabon ranked 63rd among the world's most popular cities with 3.54 million tourists. Porto was in 96th place with 2.34 million tourists.
On average, each of the tourists arriving in 2018 spent about 1,330 US Dollars. Conversely, the inhabitants of Portugal spend as much as 2,344 dollars a year when they themselves spend vacations abroad.
Development of the tourism sector in Portugal from 1995 to 2018
The following chart shows the number of tourist arrivals registered in Portugal each year. Anyone who spends at least one night in the country but does not live there for more than 12 months is considered a tourist. Insofar as the survey included the purpose of the trip, business trips and other non-tourism travel purposes have already been excluded. The number of people passing through within the same day, and e.g. crew members of ships or flights are also not considered as tourists in most countries. If the same person travels in and out more than once within the same year, each visit counts again.
Data in the chart are given in millions of tourists. The red line represents the average of all 14 countries in Southern Europe.

Revenues in tourism
In 1995, tourism revenues amounted to 5.65 billion USD, or about 4.8 percent of the gross national product. This corresponded to about 4.57 million tourists at that time and roughly 1,235 USD per person. Within 23 years, the country's dependence on tourism has increased drastically. In the last year of the survey, the revenue now amounts to 24.11 billion USD, accounting for 9.9 percent of the gross national product. Each visitor now spends an average of 1,489 USD for his holiday in Portugal.

All data for Portugal in detail
All data correspond to the information of the World Tourism Organization.