Getting dressed up for a flight ? Those were the days.
You wore a suit particularly for international flights. My first international flight was on Qantas going to Vancouver in January 1969. I dressed in a grey wool suit and arrived to freezing weather and snow. Had cold weather clothes in my stowed luggage, but not on board.
Inflight service was great, even in economy, and no plastic cutlery there. Food was good and booze was great. Smokers were catered for (I was a smoker then).
No aerobridges then, so you disembarked via airstairs, but if it was raining, an umbrella was provided.
You felt special then.