Taking a private aircraft can be a surprisingly cheap way of travelling.
The flight I took from the small aerodrome of Benavente, near the Portuguese capital Lisbon, to Braga, a city 300km further north, took around one hour and twenty minutes. The cost for a single passenger in the tiny two person airplane: €35 (£25) return.
That was a demo flight arranged by Skyuber. The Portuguese company has developed a mobile application to allow private pilots to find passengers for their flights and share costs with them. It works in much the same way as carpooling websites.
Despite its name, Skyuber has no connection to the popular taxi-hailing Uber app that allows users to book a car and driver. And the founders say they don't want to compete with private jet companies and low cost airlines.
"It's a booking service, matching pilots with empty seats to people wanting to fly," explains co-founder Carlos Oliveira, a 38 year old entrepreneur and investor, who sold his first start-up to Microsoft. His business partner is Joao Paulo Girbal, a 53 year old former Microsoft manager, who now owns a pilot school.
In the narrow niche it operates in, Skyuber is another example of how the sharing economy offers a new way for people to monetise excess resources, such as seats in their cars or rooms in their houses. Just like Uber and Airbnb have changed traditional industries, Skyuber's founders would like to give many more people access to flying.
"We want to have the largest aircraft fleet in the world without owning the planes", says Mr Oliveira.