Passenger feedback has revealed that Wednesday has been considered the best day of the week for air travel since the beginning of 2013 to May this year.
The data was collected from 70 million passengers across 100 airports by HappyOrNot, which records customer and employee satisfaction figures worldwide.
HappyOrNot feedback-collecting smiley systems are deployed at airports in 30 countries.
According to the data, travelling through an airport between 5am and 8am on a Wednesday provides passengers with the best possible experience.
HappyOrNot CEO Heikki Väänänen said: "The happy, vacation-mode attitude can quickly turn into a stressful, unhappy one if you have an unpleasant experience at the airport.
"Things like long queues at security checks, slow baggage claims, inefficient check-ins, or poor service in lounges can have an impact on your mood and affect the rest of your vacation.
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"It is understandable that the busiest days get the worst feedback results."
The top ten countries for air passenger satisfaction are Norway, Sweden, Fiji, Iceland, Ireland, Italy, the UK, Spain, Bahrain and the US.
Last year, airports in these countries collected more than 30 million feedback inputs and recorded an average passenger satisfaction of 80.57%.
In November 2015, HappyOrNot feedback collection services were deployed at London Southend Airport.
Heathrow Airport was the company’s first airport client in 2012.