Heads up, deal hunters! If you're dreaming of sunshine, beaches, and maybe a little mofongo, Delta's offering some sweet round-trip fares to San Juan, Puerto Rico, for only $276. And the best part? This isn't one of those super-basic fares that nickel and dimes you. This deal includes your advance seat assignment, so you can snag that window or aisle you prefer. Plus, you get to bring a normal-sized carry-on bag without any extra fees. This is important because other airlines are charging extra for the ability to carry on a bag and select a seat! So, if a Caribbean getaway is calling your name, jump on this deal quickly! A fare this low to a fantastic destination like San Juan isn't likely to stick around for long. Time to trade in those winter blues for some turquoise waters!