Not really mine either, but it's true that on a plane there are always people who order tomato juice, right? Almost to the point that I'm tempted to drink tomato juice myself to see if it does something special in the air.
My sister worked for a catering firm for a while, and she said tomato juice was always the #1 non-alcoholic drink at parties thrown by banks and insurance companies. At other functions hardly anyone asked for it.
This suggests one possible explanation for the plane riddle: perhaps these people are all bankers and insurance people.
I like tomato but prefer V-8. It's got a nice savory quality. Low sodium only. Believe me, it's still plenty salty.

Tomato Juice on an airplane is your body's craving for it's natural blood thinning properties. Since you're sitting on a plane for a long time, blood tends to clot (you've all heard the stories). I would only drink tomato juice on an airplane even as a youngster...after doing some research, your body is telling you what it needs. If you've never tried tomato juice while flying, trust me. Once you have it, you'll crave it every time you fly. Now if my body would only stop craving methamphetamines!
I'm another V-8 person. I drink tomato juice on planes, though. It's when I know I need something liquid, and the alternatives are soft drinks with sugar and/or caffeine, coffee, terrible tea, or booze (which you have to pay for). The orange juice is often canned or otherwise not very tasty. The tomato juice is a more healthful drink and is more filling than other options. That can be important on those flights where the only food you get is a package containing three half-crushed pretzels.
your body's craving for it's natural blood thinning properties.
There's very little data on this. One study found that tomato juice acts as a blood thinner. It was a preliminary study with only 20 participants. And, the study was done with diabetics, so may not apply to all. Participants drank tomato juice every day for three weeks. There is no evidence that a single glass will do anything, but drinking tomato juice on a regular basis may be beneficial to long haul flyers.