Cheap Frontier Airlines flights San Juan (SJU) to San Diego (SAN)

Set the “Price (lowest to highest)” filter on Expedia to find cheap Frontier Airlines return flights from SJU to SAN. Affordable one-way fares are also on offer.**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.

Frontier Airlines flights to San Diego tend to be more affordable in the off-peak months of January and November. Whether you’re searching for a round-trip or one-way ticket, you could land a better deal then.

Search for Frontier Airlines flights from SJU to SAN about one month before you want to go. The most affordable time to reserve an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of itinerary and fare class, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Travelers who book on a Sunday can save 17% on average 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.

Simply enter your dates, press search and select the “Nonstop” filter on Expedia to browse any direct flights from SJU to SAN with Frontier Airlines or other airlines.

Browse Frontier Airlines’s earliest flights from SJU to SAN by using our “Early Morning” and “Morning” filters. Not only will you get to your destination sooner, early departures are also 20% less likely to be canceled.**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 Luis Munoz Marin Intl. Airport (SJU) to San Diego come in to San Diego Intl. Airport (SAN). This is the main entry point here.

Offering a rewarding loyalty program, Frontier Airlines is a popular choice for many passengers journeying from SJU to SAN. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

In most cases, you can cancel or modify your flight, although additional fees may apply if you booked more than 24 hours ago. Need to keep your options open? Use our “Changes included” or “No cancel fee” filter to find flights that won’t charge extra if you have to alter your plans. To make modifications, visit “Trips,” select your flight and click on “Manage Booking” for further information.