We bought the zummi Eden. I really wanted a more expensive one but couldn’t justify it at the time. We haven’t used it on a plane yet but we’ve used it a lot in uk from 6 months onwards and it’s been great!
We’ve had a few but joie litetrax is less than £200 & is perfect for toddlers in my opinion. Although its lightweight it still has decent sized wheels so actually feels sturdy compared to a few other more expensive ones
I’ve just bought the joolz aer+ and I would recommend it :) lies flat for naps on the go, you can open / close it with one hand and has an extendable hood, it’s only 6kg too