Top 10 Trending Summer Destinations
#9

Lisbon, Portugal

29% increase in flight searches vs. previous summer
While your friends join the crowds in Paris and Rome, make Lisbon your European escape by the sea.
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When to book
Median airfare by days before departure
Hacker Tip
Every weekend in summer brings outdoor concerts and fairs to Lisbon's streets. From medieval markets to NOS Alive Music Festival, there's something for every taste.
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