Travel search company Skyscanner has reported 2013 turnover up by 96% to £65.8 million.
Users of its website and app have doubled, to reach 25 million each month, it revealed in a trading update for the year to the end of December 2013.
Chief executive Gareth Williams said the company is now worth at least $1 billion and he plans to keep growing rapidly.
The firm secured an investment by Sequoia Capital, a leading US technology investment firm, which valued it at $800 million in October.
Skyscanner’s app has been downloaded more than 30 million times.
Chief financial officer Shane Corstorphine told the BBC: "Our growth has been predominantly driven by our flight search on both web and mobile platforms, reinforcing our position as Europe's leading flight search site, while seeing rapid growth in the Americas and particular in Asia-Pacific.
"With an increasing number of consumers booking their travel on the go, mobile will remain a key part of our strategy over the next 12 months and beyond".
Co-founder Williams said this year will see a focus on growing the hotel and car hire parts of the search engine beyond roughly 10% they now represent.
He also told a Travel Weekly Business Breakfast he wants to make the search engine more individualised and to build more of an online community around Skyscanner.
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