I must have been 9 or 10 years old, flying on a direct flight to Dallas to visit my grandparents. It was the first trip I'd been sent off on by myself. My grandfather had a ton of frequent flyer miles from business travel, and he used some to get me a roundtrip ticket in first class.
I really don't remember much of the trip at all, except that I had to dress up (this was back in the very early 80s, and my parents insisted) and the food was 'yucky'. All that fancy food just wasn't doing it for me. I do remember that the stewardess was nice enough to get me some 'normal' food from the back, where they had sandwiches or hot dogs or something for children meals.
I guess the experience was a little wasted on me at that age...