I’ve flown 3 times with my little one now and just used a regular stroller, you can take it right up to the plane and it’s just a little kick at the back with your foot and it folds in half, very light weight and inexpensive Joie is usually a good brand, they have one called Nitro E, £55 in the uk so about $68/70 in the US
We always take the usual pram, no need for a new travel one. You can usually take it right up to the gate sometimes even right onto the tarmac before they put it in the hold, so having one that could be hand luggage isn't essential