To save on the cost of your flight from Idaho Falls to Puerto Rico, book at least 41 days before your planned departure. Booking around this time can save you about 11% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $380 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $415.
Flights from Idaho Falls to Puerto Rico lean towards being more expensive in December. Prices are generally better when you fly from Idaho Falls to Puerto Rico in September, with the cheapest ticket starting at $194.