SEA to SAN Flight Guide: Find Cheap Flights from Seattle to San Diego

First, arrive at SEA at least two to three hours early, especially during peak morning hours, as security lines can get quite long due to the high volume of international and domestic connections. Second, consider booking a window seat on the left side of the aircraft when flying south to catch breathtaking aerial views of Mount Rainier and the rugged Oregon coastline as you depart Washington state. Third, download your airline's mobile app before you leave home to receive real-time updates on gate changes and baggage claim information, which is particularly helpful given the compact but busy nature of San Diego's terminal layout. Finally, since both cities are known for their distinct food scenes, grab a quick local snack like a Beecher’s cheese sandwich in Seattle or save your appetite for authentic street tacos immediately upon landing in San Diego.

Flight prices for the SEA to SAN route typically peak during the summer months of July and August and around the winter holiday season when travelers are looking for warmer climates. For the best deals, consider flying during the 'shoulder' seasons of late spring (April and May) or early fall (September and October), when the weather in San Diego is still spectacular but the crowds are thinner. Mid-week departures on Tuesdays and Wednesdays often yield lower fares compared to weekend flights.