I don’t see anything in the news reports about charging larger passengers extra.
The Finnish Transport and Communications Agency will check average weights calculated from the data this summer. The airline will use those numbers for aircraft balance and loading calculations from 2025 to 2030. (NBC News)
I’ve flown on many very light-aircraft where it’s standard procedure for pilots to ask passengers how much they weigh and then distribute passengers around the plane for balance.
The overspilling seat issue isn’t about weight but size. Two people, one short and fat, one tall and muscular could weigh the same. Mike Tyson's fighting weight was around 220lbs about fifteen and half stone. He was 5'10". I'm much shorter. If I weighed that I'd be hanging over the seat.
I do sympathise with people whose personal space is encroached. I’ve experience it, on a bus not a plane, where I could barely get one bum cheek on the seat and it’s been easier to standbut where does one draw the line on these things? I’ve had uncomfortable plane journeys where a very tall person has had to jam their legs again my seat and felt obliged to apologise for the nuisance. They really should have beee seated in the bulkhead but these seats are often claimed by people with other needs.
Airlines need to adapt their configurations, acknowledging that people come in a variety of sizes. Size isn’t a choice and sometimes obesity isn’t either.
I knew someone whose job it was configure cabin space depending on the kind of cargo, human or freight. Taking out a few rows and not selling seats to maximum capacity would make journeys a lot more comfortable for everyone but then airtlines would argue that ticket prices would have to rise.
Aircraft have a set maximum weight to ensure safe takeoff. Fuel requirements are calculated based on weight and distance. Planes carry little more fuel than necessary to complete a journey and margins are tight.
A few years ago, returning from Greece, there was a ground incident at Gatwick causing planes to be be held waiting for permission to land. We circled for only about five minutes before the pilot announced that if held much longer he would need to reroute to Luton to take on more fuel - which is what happened. It was little more than a splash and dash. We were back in the air and landed at Gatwick soon after. It made me wonder just how tight the fuel calculation must have been and what had factored into it.