I usually manage to blag it and get our stoller onboard as it folds up very small, about the size of a hand luggage so it fits easily into overhead bins, sometimes the crew offer to put it in the wardrobe.

Bag drop and gate staff usually want to tag it anyway just incase the crew say no, but like I say I haven't had a problem, even on very full flights.

On my infamous EK flight we weren't allowed to bring it onboard and didn't see it again until the carousels even though it had a big tag on it saying to deliver to the aircraft door.

BA crew are usually OK to let us bring it into the cabin if asked nicely as they can see it's so small.

It's called a Quinny Zapp






I would recommend folding it before you reach the aircraft door so the crew can see how small it is and if airport staff try to take it off you before you board, tell them you want to ask the crew if you can take it onboard and if they say no you will bring it back.