I do not sleep with the windows open like you, but I do like the air moving in my room when I sleep. I pack a small personal fan in our baggage when we go on cruises. It is only 8" across and not very powerful, but having that little extra air hitting my face makes a big difference in sleeping comfort. I paid less than $20 for it at Wal-Mart. Make sure you buy a fan that folds flat so it is easy to pack.
The fan has gone with us on a couple Caribbean cruises and one on the A mazon. I slept great every night.