Travelling with stroller.

My son is now two years old. The airlines didn't mind the strollers I used but they had to be folded. The first time my son was four months and we flew to Portugal. He had a Sport stroller that had five positions. It was bulky and folded up large. It had a demanding time on all those cobbles. It broke and my sister gave me a lightweight stroller suitable for babies over six months. That was a delight to fold up in did so in a umbrella style. We took it to Latvia but it broke a few days from the end of our trip. My son was thirteen months then. I had to go to a shop in Estonia and buy a new stroller. It was similar to the previous one and folded up in the same way. That broke last week and luckily I have a Phil and Ted three wheel buggy ready for my new baby and my toddler son. I will have to purchase a carry bag for it before getting a flight or the airline might refuse it.