$94 Cheap Frontier Airlines flights Atlanta (ATL) to San Juan (SJU)

You'll find affordable round-trip Frontier Airlines flights from $169 from ATL to SJU by organizing your results from "Price (lowest to highest)" on Expedia. Or search for bargains from $94 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Start your search for Frontier Airlines flights from ATL to SJU about one month before you want to leave. The most affordable time to book an international flight is generally 18 to 29 days ahead of your travel date when you can save 17% versus booking four to five months in advance. No matter your fare class and itinerary, the best day to book international airfare is usually Sunday. Friday can be the most expensive. Passengers booking on a Sunday can save an average of 17% compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

The earliest Frontier Airlines flight from ATL to SJU departs at 10:17AM UTC-5, touching down at 2:56PM UTC-4. If you'd like to jet off later, the last Frontier Airlines flight leaves ATL at 11:35AM UTC-5 and lands at SJU at 4:07PM UTC-4. Flying before noon is generally a smart option as morning flights are least likely to face cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.

With a rewarding loyalty program, Frontier Airlines is a popular choice for many passengers departing from ATL to SJU. Plus, if you're a Frontier Miles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.