I think she might be on her way to the airport right now.
I think she's headed for the airport as we speak.
ーI think she might be on her way to the airport right now.
「今頃彼女は空港に向かっているところだろうね」
この場合は to be on one's way to the airport right now で「今頃空港に向かっている」と言えます。
ーI think she's headed for the airport as we speak.
「彼女は今頃空港に向かっていると思う」
to be headed for the airport as we speak で「今頃空港に向かう」とも言えます。
ご参考まで！
カナダ 
