The results show that the list of preferred summer destinations for this year is once again led by cities such as London, Paris, and Rome, which occupy the Top 3 of this ranking, respectively, followed by Cancun, in Mexico; Athens, Greece; and Tokyo, Japan.

In a press release, Delta Air Lines revealed that searches for Paris grew “approximately 16% compared to last year”, while the Japanese capital rose from 7th to 6th position, with a 54% increase in searches compared to last year.

Lisbon has now entered the list of the top 10 summer destinations “for the first time, overtaking Vancouver thanks to a 6.5% increase in searches since the same period last year”.

The Portuguese capital is the 10th most sought-after destination among Delta Air Lines passengers, in a list that also includes the city of Amsterdam, in the Netherlands, in 7th place; Dublin, Ireland, which came in 8th place; and Barcelona, ​​​​in Spain, which was the ni9th most sought-after destination among the carrier's customers.

The list was compiled based on data from Delta Air Lines passenger surveys, via the airline's website and app, between 1 November 2024 and 25 March 2025, for travel between 1 May and 31 August 2025.