Find a great deal and save up to 7% by booking at least 19 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Duluth to Puerto Rico within the next two weeks, with the cheapest ticket starting at $262.
August can be a great time to fly to Puerto Rico from Duluth with a flight ticket averaging about $313. Cheapflights users have found deals in the month of August for as cheap as $121. The most expensive prices can be found in the month of December.