Question : How long do most people stay in Saint Louis when they fly in from Okinawa?
Answer : Of course you're not most people, but if you were, you'd stay roughly 17 days.
Question : Would you be willing to change your travel days if it saved you money?
Answer : The lowest-cost day to fly in December is Thursday. Flexibility is paramount when booking travel plans in order to keep costs down.
Question : Do prices fluctuate more for this route than others?
Answer : Flight prices for OKA to STL change a lot more than the majority of routes. However, the sooner you book, the better price you tend to get.