So how far and for how long do you think someone can fly with a luggage that fits under their seat?
I can't speak for everyone (and are probably an exception, since even for a 3 week vacation my luggage never exceeds 15kg). But I can easily go for a very long weekend (up to a week) with the contents of a small duffle bag that easily fits under the seat.
Which means a fresh t-shirt, underwear and socks for the entire time. It includes toileteries, something to read and a medium sized camera.
In my experience people usually pack far too much.
The biggest promotion on https://www.ryanair.com/ as I see it is "Two-night stays in Europe from €88" — weekend trips are a big part of Ryanair's business.
A toothpaste tube, deodourant and a mini shaving foam fit easily in the 1L limit.
Liquids really don’t need to be a big issue. All my toiletries are in a 1 qt. Ziplock even for 2 or 3 week trips. I know some people carry a lot more than that but it’s often not needed.
>So how far and for how long do you think someone can fly with a luggage that fits under their seat?
In any 1 week vacation to any destination around the world? People are diverse and you shouldn't presume everything about yourself applies to everybody else. I've been on dozens such vacations.
So how far and for how long do you think someone can fly with a luggage that fits under their seat?
You can't honestly say you're selling a transportation service and let people take almost no luggage.
If a fee is unavoidable, then it's not a fee, it's part of the price.