Ohio to Madrid

Looking to book flights for 5 from Ohio to Madrid, Spain on Nov 4th returning the 10th. Common airports are CMH or CVG, CLE is a little too far. Flights have been hovering around $710~725. Unsure if I should go ahead and book or wait until we get closer, not asking for a prediction but any historical data would be helpful. Over the past 2 month's ticket prices have not moved. We are open to alternative Spain or Portugal airports but I have not seen a signifigant price savings that would make that worthwhile. I wanted to see if anyone has flown a similar route and if the ticket prices are similar or if there is a combination I have not thought of.

Thanks,