Happy Or Not, founded in Finland in 2009 by Heikki Väänänen and Ville Levaniemi, has exclusively shared its first airport report with CNN Travel.

It reveals the airports with the highest customer satisfaction globally, measured by the percentage of people hitting the dark green or light green buttons.

It also tells us the happiest and unhappiest times of day, week and year to fly as well as the parts of the airport journey most likely to make us hit the red button of rage.

The report is based on feedback from 158 million data-points from HappyOrNot smiley terminals in 160 airports across 36 countries.

Happy Or Not analysed data collected between November 2016 and November 2017, from airports which received more than 120,000 button-presses in the past year across more than two areas of the airport -- security, baggage reclaim, washrooms and so on. Some 68 airports in 22 countries met the criteria to be included in the rankings.

Airports with the highest satisfaction levels.

1. Exeter Airport, UK -- 88.66%
2 (tie). Cork Airport, Republic of Ireland -- 88.45%
2 (tie). Leonardo da Vinci-Fiumicino Airport (Rome), Italy -- 88.45%
4. Dallas Fort Worth International Airport, USA -- 87.35%
5. Newcastle International Airport, UK -- 87.05%
6. London Southend Airport, UK -- 86.79%
7. Cardiff Airport, UK -- 86.57%
8. Keflavik International Airport, Iceland -- 86.35%