Not the only one, nope. Must be: Pantala flavescens. Uppercase only in the first word of the name. Is a common error.
The species can be identified by the small brown spots near the tip of wings. There is an additional "diamond-like" spot cell called Pterostigma near the tip of all dragonflies but Pantala has this, plus a small (multi-cell) brown area
> The data are circumstantial
Is true that insects can enter and travel in airplanes but the species is known to group in some Asian countries so we would need a lot of dragonflies travelling in a lot of airplanes at the same time each year. Statistically unlikely. And is a big insect that would create some stir around.
Yup, I know the term "specific epithet" :) It sounds like we both have some evolutionary biology or systematics background. However, using that term wouldn't really have aided communication here :)
It's funny what a strong reaction this provokes if you have background in systematics. This is not a minor error :)