Most travelers find the cheapest round-trip airfare to Osaka when booking during the month of April.
In general, most flyers find the cheapest time to book a flight to Osaka is about 49 days prior.
On average, the cheapest flights to Osaka are found when departing on a Tuesday. Try to avoid departing on a Wednesday, as this is usually the most expensive day.
On average you can find the best deals on plane tickets to Osaka when looking for flights with afternoon departure times.