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

Grab affordable round-trip Frontier Airlines flights from $188 from SAN to PDX by organizing your results from “Price (lowest to highest)” on Expedia. Or search for options 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.

Frontier Airlines flights to Portland are generally cheaper in the off-peak months of January and December. Whether you’re in search of a one-way or a return ticket, you could score a better deal then.

Search for cheap Frontier Airlines flights from San Diego Intl. Airport (SAN) to Portland Intl. Airport (PDX) one to three months ahead of your departure day. 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 itinerary, the ideal day to book a domestic flight is usually Sunday and the most expensive day tends to be 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.

Use the “Nonstop” filter when searching for direct Frontier Airlines flights from SAN to PDX. It’s also a great way to compare other carriers offering the same nonstop trip.

Sort your results by “Morning” and “Early Morning” to see the earliest departures from SAN to PDX. Taking off early means flight cancellations are less likely.**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 San Diego Intl. Airport (SAN) to Portland arrive at Portland Intl. Airport (PDX). This is the main gateway here.

Offering a rewarding loyalty program, Frontier Airlines is a popular choice for many passengers heading from SAN to PDX. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you can 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.

It’s generally possible to cancel or modify your flight, although there may be additional charges if you booked more than 24 hours ago. Want to keep your options open? Apply the “No cancel fee” or “Changes included” filter to find flights that won’t penalize you if you need to adjust your plans. To modify your booking, go to “Trips,” select your flight and click on “Manage Booking” for more information.