Cheap flights from Seattle to San Diego from R1 612

The month of January is, on average, the cheapest month to fly to San Diego from Seattle, with most prices found around R3 127. The month of September is another great option to travel to San Diego, with average flight prices from Seattle averaging around R3 485.

Fly from Seattle/Tacoma Intl to San Diego for the best Seattle/Tacoma Intl - San Diego flight prices

You are more likely to see cheaper flights to San Diego from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around R4 518 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Seattle for as low as R3 615 on momondo.

There is only 1 cabin class available to choose from on Seattle to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 17% of flights between Seattle and San Diego have experienced a delay on any given week. The average delay length over the past 12 months has been 121 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Delta have had the fewest delays on this route over the last 12 months, with about 14% of their flights experiencing any sort of delay.

The number of flights available between Seattle and San Diego is 17 per day as of September 2026. The most frequent departure time is 18:00, with 38% of daily flights leaving in the evening.

119 flights are operational weekly from Seattle to San Diego as of September 2026. The most popular departure day for this route is Wed, with 34% of flights per week taking off on this day.