The best pricing can be found in the month of October. Prices to Puerto Rico from Bismarck average $719. You can even find prices in October for less than $719, as users have found deals to Puerto Rico from as low as $407. The month of December appears to be one of the more expensive times to travel to Puerto Rico from Bismarck. Flying in the targeted month can save you up to 30%.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Bismarck to Puerto Rico as you normally would.