But the EASA found those averages hide a range of variables: men travelling first class tend to weigh more those in economy, while for women the reverse is true. The average hand luggage is 6.1kg, but that average falls significantly in the summer and men carry on heavier items than women.
So Finnair is keen to survey the mix of air travellers specific to their airline.
As well as flying Finns in and out of their home country, the airline offers transfers between Asian and European destinations, and they suspect that the combination of tall Finnish men in winter coats, long-haul travellers from East Asia and daily business travellers around Finland will add up to different set of average outcomes.
Finnair is looking for more volunteers to be weighed over the winter months. Then they’ll recommence in the spring, when travellers have stripped down to their lighter season togs.
One question is whether basing the data on those happy to step up might skew the results.
“That’s a question a lot of people have asked,” said Ms Tallqvist. But she doesn’t think it will pose a problem.
“We found yesterday and today we had people of all shapes and sizes. We had Finnish and Asian customers, we had a variety of male and female and of different sizes.”
In recent years, other airlines have begun to look at the variation in passenger weight.
In 2013, Samoa Air controversially became the first airline to charge passengers by the kilo rather than per person. Last year Hawaiian Airlines also began weighing passengers travelling on routes to and from Samoa (where obesity rates are among the highest in the world) so that their weight can be evenly distributed around the plane.
Travellers hold strong opinions on both sides of the argument whether treating heavier passengers differently is fair. But Finnair says that is certainly not what they are considering.
“That has been a concern that some people have raised,” says Ms Tallqvist.
“For us, this has nothing to do with ticket pricing or anything like that.”