L.L.
We traveled a couple of months ago with our two year old and I learned a lot! We bought her a seat so that we could use the car seat...being safety-minded parents, you know! She hated being in the seat because she couldn't tell the plane was moving once airborne. She wanted out and wanted to be able to roam and play. We forced her to sit in the seat for take offs and landings but other than that she sat in my husband's lap. I'm still glad we brought the car seat but it's a lot of money and you should consider how important it is to you. Most people just hold their toddlers and it's all fine. My advice is to pack lots of snacks, have a cup with you, and some books or toys. As for the ears popping, she didn't complain once. Happy flying!