I am so old......
PanAm from San Francisco to Manila in 1953; I was ten years old. I also flew Northwest Orient Airlines during the '50s and '60s, when my family lived in Indonesia. I think I still have, buried in a box, a 1968 NW ticket from returning to the US at the end of Peace Corps service.
The 1953 flight was pre-jet, with berths made up from the seats or dropped down from the ceilings. Those were real flat-bed seats!