$94 Cheap Frontier Airlines flights Portland (PDX) to San Diego (SAN)

Set the “Price (lowest to highest)” filter on Expedia to find cheap Frontier Airlines return flights from $188 from PDX to SAN. Affordable one-way options from $94 are also available.**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.

January is one of the cheapest months to jet off to San Diego with Frontier Airlines. You could also find great deals on return and one-way tickets in November.

Search for affordable Frontier Airlines flights from Portland Intl. Airport (PDX) to San Diego Intl. Airport (SAN) one to three months before your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the ideal day to book a domestic flight is usually Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.

Fill in your dates, click search and select “Nonstop” on Expedia to browse any direct flights from PDX to SAN with Frontier Airlines or other airlines.

Browse Frontier Airlines’s earliest flights from PDX to SAN by checking the “Early Morning” and “Morning” filters. Not only will you arrive sooner, early departures also experience 20% fewer 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.

Frontier Airlines flights from Portland Intl. Airport (PDX) to San Diego arrive at San Diego Intl. Airport (SAN). This is the main entry point to this destination.

With a rewarding loyalty program, Frontier Airlines is a popular choice for many passengers departing from PDX to SAN. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you can 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.

Depending on your ticket type, a fee typically applies if you cancel or change your booking more than 24 hours after it has been confirmed. To secure tickets with more flexibility, select our “Changes included” or “No cancel fee” filter when searching for flights. To learn more about modifying or canceling your reservation, head to “Trips,” select your flight and tick “Manage Booking.”