I need tips!: flying 10 hours with a 16m old baby

jane

I'm still debating if we should fly when my baby is 16m or 23m. I really don't know if it will be any difference. Also I wish I can hold hee on my lap the entire flight and save $935, but I think is impossible for 10 hours. The flight is overnight. I have so many questions. Do I need to bring a car seat? earmuffs? food? blanket? She usually sleeps thru the night. Any other tips u find helpful? thank you!