San Andreas Island, Colombia
Credit: Cesar Okada/Getty Images

Situated in the Caribbean, between Colombia and Nicaragua, is the little-known island of San Andrés. And thanks to a rare flight deal, you can travel there this spring (between April and May) or fall (between September and October) for an unusually cheap $310 round-trip.

According to Scott’s Cheap Flights, the discounted tickets to San Andrés can be found from a number of cities in the United States.

The most inexpensive seats are on sale from San Diego and Fort Lauderdale, though flights in the mid-$300s are available from airports all over the nation.Flights departing from Westchester, Syracuse, Rochester, Richmond, Providence, Austin, Buffalo, and Portland, Maine, for example, are all selling for $336 round-trip. And for less than $360, you can fly out of Pittsburgh, Boston, Miami, or Las Vegas.

Use Google Flights to identify the most inexpensive departure and return dates from your home airport, and then find tickets through your preferred search engine.

Once your flights to San Andrés are reserved, you can start daydreaming about your tropical island getaway, which should include boat rides, adventurous scuba diving, and snorkeling in the island’s famous protected reefs. (Just a short puddle jump away is the UNESCO-designated Seaflower Biosphere Reserve, which is full of barracudas and sea snails.)