I always order it, just because I like tomato juice. I didn't realize it was that common to order it on airplanes... That having been said, it does a really go

I always order it, just because I like tomato juice. I didn't realize it was that common to order it on airplanes... That having been said, it does a really good job of coating and soothing your throat if it's dry/scratchy/starting-to-get-sore. Given how often that happens while flying, I'd wager that plays a role in tomato juice's popularity on planes.