"I'm at the airport waiting to get on the plane"

[mwtzzz]

"I'm waiting at the airport to get on the plane"
The literal translation is "Estoy en el aeropuerto esperando subir al avion".

I'm wondering if there is a more commonly used way to say it, or if this is pretty much how people all over Latin America say it.

[AngelicaDeAlquezar]

I think that's what you're most likely to hear... probable variations would include "para subir" or "para poder subir", but the meaning is the same.

[poli]

If memory serves, the word abordar,abordamiento is used instead of subir.

[AngelicaDeAlquezar]

Oh, very true, Poli. "Estoy esperando para abordar (el avión)" is also very common.