score:7
Just to add my question is more from my rights perspective.
This will typically spelled out in the terms of conditions (or carriage of contract) of the airlines you are flying with.
Most airlines have rules that determine what a "passenger of size" is and what they need to do (buy an extra seat, etc). It's a politically and culturally sensitive topic, so the rules tend to be fairly well spelled out.
Ones they have determined that a passenger is NOT a "passenger of size" they are treated like any other passenger.
Chances are you are not entitled to any compensation, since the passenger next to you was most likely not identified as a "passenger of size".
Upvote:0
Are there any restrictions on max space which can be taken by passenger in a flight.
Yes for some airlines. https://thepointsguy.com/2016/08/passengers-of-size-flight-attendant-insider/ gives a list of policies per airline, e.g.:
Alaska Airlines: Alaska requires passengers to buy extra seats if they canβt fit in a seat with the armrests in the down position.
American Airlines: If the passenger requires a seat belt extension and his/her body extends more than one inch beyond the edge of the armrest, that passenger is required to buy an extra seat.