Cheap Flights from Seattle to San Diego

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Flight deals from Seattle to San Diego

Looking for a cheap last-minute deal or the best return flight from Seattle to San Diego? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Seattle to San Diego

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to San Diego flights are currently cheapest in July.

Direct flights from Seattle to San Diego

Alternative Seattle to San Diego routes

Looking for the cheapest, fastest or easiest route from Seattle to San Diego? You could fly into the following airports instead.

Seattle to San Diego: Flight information

The things to know before you go.
Cheapest flight foundRs20,460
Cheapest month to flyJuly
Average flight time2 hrs, 51 mins
Most popular airlineAlaska Airlines
Average flights per week445

Finding cheap flights from Seattle to San Diego: Frequently asked questions

There are 2 airports in San Diego: San Diego International and McClellan-Palomar.
The best price we found for a return flight from Seattle to San Diego is Rs41,197. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 51 minutes is the average flight time from Seattle to San Diego.
Alaska Airlines, Air Tahiti Nui and Hawaiian Airlines fly direct from Seattle to San Diego.
As of July 2025, there are 445 flights per week flying from Seattle to San Diego.
The cheapest month to fly from Seattle to San Diego is usually July.
If you're flying from Seattle, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the centre of San Diego. We've found flights into this airport from Rs41,197.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to San Diego on Tuesday, 29 July 2025.
Yes – the average flight time is 2 hours and 51 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Diego but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Diego is around 40 days in advance, so don’t leave your flight to the last minute.
In July, the average temperature is usually around 22°C. August is typically the warmest month in San Diego, when it usually averages around 28°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 10°C. The rainiest month is February.
The cheapest airline that flies to San Diego is Spirit Airlines. And the cheapest airline that flies to McClellan-Palomar Airport is Alaska Airlines.

Travelling from Seattle to San Diego: what you need to know

  • Kick off your travels at Seattle-Tacoma International Airport (SEA), the main airport in Seattle. Look for flights from Seattle to San Diego that take off from this terminal.

  • San Diego International Airport (SAN) and McClellan-Palomar Airport (CLD) are the primary entry points to San Diego.

  • Around 2 hours 50 minutes is how long you can expect to be in the air on a direct Seattle to San Diego flight.

  • San Diego's timezone is UTC-7, which is the same as Seattle.

  • Seattle-Tacoma International Airport (SEA) to San Diego International Airport (SAN) is the most popular route that connects these two cities. There are 91 departures a week to choose from. If you have things to finalize before heading off, the last flight from Seattle to San Diego is with Alaska Airlines at 21:17. Choose the first SEA to SAN departure with Alaska Airlines at 05:45 to fit in more activities on your first day in San Diego.

  • To ensure you make it on your Seattle to San Diego flight, leave plenty of time to navigate the airport and find your gate. Arriving two hours ahead of international departures and one hour before domestic flights is the general rule.

  • Flying during a peak time like July? High seasons (like Thanksgiving, Christmas/New Year and spring break) can add an hour at security. Be extra cautious and arrive up to four hours before international flights and two hours before domestic departures.

How to find the cheapest flights from Seattle to San Diego

  • Lock in cheap Seattle to San Diego flights by booking two months ahead. According to our research, that's the ideal time frame for finding a bargain.

  • The best month for landing cheap plane tickets from Seattle to San Diego is May. Use the 'Whole month' tool to compare prices, then choose the dates with the lowest fares.

  • Finding a cheap flight from Seattle to San Diego is easy with Price Alerts. All you need to do is set up one of these automatic alerts and we'll get in touch when there's a better deal.

  • Pick your ideal arrival and departure times, number of stops and airlines with the filters. Alternatively, sort your Seattle to San Diego flight results by 'Best,' 'Cheapest' or 'Fastest.'

Flying from Seattle

Seattle-Tacoma International Airport (SEA)

  • If you're looking for a direct flight from Seattle to San Diego, you can leave from Seattle-Tacoma International Airport (SEA). Fly from SEA to San Diego International Airport (SAN) in one seamless journey.

  • Check out the promotions with Alaska Airlines. This carrier offers direct Seattle to San Diego plane tickets from SEA.

  • Located around 18 kilometres from the centre of Seattle, SEA can be reached in about 20 minutes by car, depending on traffic. The journey on public transport is roughly 55 minutes.

  • Catching an early flight from Seattle to San Diego? Avoid the last-minute rush to the terminal (and enjoy a little extra shut-eye) by choosing one of these stays close to Seattle-Tacoma International Airport:

  • 81.27% of flights departing from Seattle-Tacoma International Airport touch down at their destination on schedule. Given its solid on-time performance, you're unlikely to be delayed when taking off from SEA.

Arriving in San Diego

San Diego International Airport (SAN)

  • San Diego International Airport (SAN) to central San Diego takes about 10 minutes to reach by car. The centre is roughly 3 kilometres away.

  • It usually takes 20 minutes to get there when travelling by public transport.

  • If you have a late flight from Seattle to San Diego, nothing beats the convenience of staying close to the terminal. Grab your suitcases from the carousel and then be showered and resting soon after at one of these hotels near SAN:

  • Fast-track your adventure by picking up a San Diego International Airport rental car. Grab your wheels from Thrifty, Dollar or Budget and explore beyond San Diego's main sights.

  • Reserving your ride from San Diego International Airport around two weeks in advance increases your chances of getting a good deal.

  • The address for SAN is N Harbour Dr.

McClellan-Palomar Airport (CLD)

  • McClellan-Palomar Airport (CLD) is about 48 kilometres from the centre of San Diego. Once you've hopped off your flight from Seattle to San Diego, it'll take you approximately 40 minutes to reach the heart of the city in a ride-share or cab.

  • Public transport will get you there in approximately 2 hours 15 minutes.

  • Budget, Hertz and Avis make picking up a McClellan-Palomar Airport rental car simple. These suppliers are located around or in the terminal and will have you behind the wheel before you know it.

  • Get the vehicle you prefer, not just what's left, by booking your ride from CLD before your arrival. You'll also avoid last-minute price hikes, especially during busy airport times.

Best time to go to San Diego

  • July is the busiest month for flights from Seattle to San Diego. To steer clear of the crowds, head to San Diego in May.

  • Before locking in your Seattle to San Diego tickets, consider what kind of weather you prefer. August is the warmest month in San Diego, with temperatures ranging from 17ºC to 28ºC.

  • Look for cheap flights from Seattle to San Diego in February if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 7ºC and 23ºC on average.

More about San Diego

Explore more of United States

  • Los Angeles is just one of the many places in United States waiting to be explored after you've seen San Diego. Around 177 kilometres to the north-west, its top attractions include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Phoenix is another must-experience destination in United States and is around 483 kilometres east of San Diego. No trip is complete without visiting Desert Botanical Garden, Heard Museum and Papago Park.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.