The best pricing can be found in the month of March. Prices to Jeju City from Riverside average $840. You can even find prices in March for less than $840, as users have found deals to Jeju City from as low as $482. The month of July appears to be one of the more expensive times to travel to Jeju City from Riverside. Flying in the targeted month can save you up to 94%.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Riverside to Jeju City as you normally would.