$110 Cheap Frontier Airlines flights Philadelphia (PHL) to San Juan (SJU)

Landing cheap one-way Frontier Airlines flights from PHL to SJU from $110 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Alternatively, check out our affordable round-trip fares from $213 for your next exciting vacation.**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.

October is one of the least expensive months to jet away to San Juan with Frontier Airlines. You could also find great prices on one-way and round-trip fares in September.

Snagging the best Frontier Airlines deals from PHL to SJU is typically all about timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. As an added bonus, you can pocket 17% on average by buying your tickets on a Sunday rather than a Friday, which is usually the most expensive day to book.* It’s smart to kick off your flight search about one month before your travel dates.*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.

Frontier Airlines offers direct flights from Philadelphia Intl. Airport (PHL) to Luis Munoz Marin Intl. Airport (SJU), with 17 departures each week. Just choose the “Nonstop” and “Airline” filters during your search on Expedia to find all direct Frontier Airlines flights to SJU.

Take off from Philadelphia Intl. Airport (PHL) for Luis Munoz Marin Intl. Airport (SJU) on a direct Frontier Airlines flight, and you’ll be airborne for approximately 3h 44m.

Saturday has the most Frontier Airlines flights from Philadelphia Intl. Airport (PHL) to Luis Munoz Marin Intl. Airport (SJU). With 3 daily departures, this is a great day to find something that will suit your plans.

Jetting off from PHL at 6:00AM UTC-5, the first Frontier Airlines flight to SJU arrives at 10:44AM UTC-4. Traveling early means you’ll be less likely to experience delays.* After something later? The last Frontier Airlines flight from PHL to SJU departs at 9:15PM UTC-5 and touches down at 1:59AM UTC-4.*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.

Frontier Airlines flights from Philadelphia Intl. Airport (PHL) to San Juan touch down at Luis Munoz Marin Intl. Airport (SJU). This is the main entry point to this destination.

Journey from PHL to SJU with Frontier Airlines and enjoy a range of perks including a rewarding loyalty program. When booking through Expedia as a Frontier Miles and One Key™ member, you can also earn OneKeyCash™* to spend on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Frontier Airlines typically flies Airbus A321neo planes for flights from Philadelphia Intl. Airport (PHL) to Luis Munoz Marin Intl. Airport (SJU). This airline also operates the Airbus A320neo on this route. Remember that aircraft type can change due to operational needs, so the plane you catch could be different when you travel.

Changes are generally free within 24 hours of making your booking, but your airline may charge you after that. For further details about modifying your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to update your itinerary without additional costs, check the “Changes included” and “No cancel fee” filters when planning your next break.