Cheap Flights from San Diego International to Seattle

Compare San Diego International to Seattle flight deals

Find the cheapest month or even day of the year to fly to Seattle

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Flight deals from San Diego International to Seattle

Looking for a cheap last-minute deal or the best return flight from San Diego International Airport to Seattle? If you want to travel next month, return fares start from $266. Find the lowest prices on one-way and return tickets right here.

Seattle.$249 per passenger.Departing Tue, 11 Aug, returning Wed, 19 Aug.Return flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from San Diego International on Tue, 11 Aug, arriving in Seattle / Tacoma International.Inbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Wed, 19 Aug, arriving in San Diego International.Price includes taxes and charges.From $249, select.

Seattle.$264 per passenger.Departing Fri, 23 Oct, returning Sat, 24 Oct.Return flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from San Diego International on Fri, 23 Oct, arriving in Seattle / Tacoma International.Inbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Sat, 24 Oct, arriving in San Diego International.Price includes taxes and charges.From $264, select.

Seattle.$265 per passenger.Departing Tue, 15 Sep, returning Tue, 22 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from San Diego International on Tue, 15 Sep, arriving in Seattle / Tacoma International.Inbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Tue, 22 Sep, arriving in San Diego International.Price includes taxes and charges.From $265, select.

Seattle.$266 per passenger.Departing Wed, 15 Jul, returning Sat, 25 Jul.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Wed, 15 Jul, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Sat, 25 Jul, arriving in San Diego International.Price includes taxes and charges.From $266, select.

Seattle.$267 per passenger.Departing Tue, 29 Sep, returning Tue, 6 Oct.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Tue, 29 Sep, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Tue, 6 Oct, arriving in San Diego International.Price includes taxes and charges.From $267, select.

Seattle.$272 per passenger.Departing Thu, 27 Aug, returning Wed, 2 Sep.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Thu, 27 Aug, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Wed, 2 Sep, arriving in San Diego International.Price includes taxes and charges.From $272, select.

Seattle.$276 per passenger.Departing Fri, 13 Nov, returning Mon, 16 Nov.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Fri, 13 Nov, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Mon, 16 Nov, arriving in San Diego International.Price includes taxes and charges.From $276, select.

Seattle.$289 per passenger.Departing Tue, 21 Jul, returning Tue, 4 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from San Diego International on Tue, 21 Jul, arriving in Seattle / Tacoma International.Inbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Tue, 4 Aug, arriving in San Diego International.Price includes taxes and charges.From $289, select.

Seattle.$310 per passenger.Departing Fri, 9 Oct, returning Mon, 16 Nov.Return flight with United.Outbound indirect flight with United, departs from San Diego International on Fri, 9 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departs from Seattle / Tacoma International on Mon, 16 Nov, arriving in San Diego International.Price includes taxes and charges.From $310, select.

Seattle.$313 per passenger.Departing Tue, 23 Jun, returning Wed, 15 Jul.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Tue, 23 Jun, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Wed, 15 Jul, arriving in San Diego International.Price includes taxes and charges.From $313, select.

Seattle.$313 per passenger.Departing Wed, 24 Jun, returning Tue, 30 Jun.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Wed, 24 Jun, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Tue, 30 Jun, arriving in San Diego International.Price includes taxes and charges.From $313, select.

Seattle.$317 per passenger.Departing Tue, 27 Oct, returning Mon, 2 Nov.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Tue, 27 Oct, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Mon, 2 Nov, arriving in San Diego International.Price includes taxes and charges.From $317, select.

Seattle.$320 per passenger.Departing Tue, 8 Dec, returning Thu, 7 Jan.Return flight with United.Outbound indirect flight with United, departs from San Diego International on Tue, 8 Dec, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departs from Seattle / Tacoma International on Thu, 7 Jan, arriving in San Diego International.Price includes taxes and charges.From $320, select.

Seattle.$320 per passenger.Departing Fri, 4 Dec, returning Mon, 7 Dec.Return flight with United.Outbound indirect flight with United, departs from San Diego International on Fri, 4 Dec, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departs from Seattle / Tacoma International on Mon, 7 Dec, arriving in San Diego International.Price includes taxes and charges.From $320, select.

Seattle.$380 per passenger.Departing Thu, 14 Jan, returning Sun, 17 Jan.Return flight with United.Outbound indirect flight with United, departs from San Diego International on Thu, 14 Jan, arriving in Seattle / Tacoma International.Inbound indirect flight with United, departs from Seattle / Tacoma International on Sun, 17 Jan, arriving in San Diego International.Price includes taxes and charges.From $380, select.

Seattle.$391 per passenger.Departing Tue, 30 Jun, returning Wed, 5 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Diego International on Tue, 30 Jun, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Wed, 5 Aug, arriving in San Diego International.Price includes taxes and charges.From $391, select.

Find the cheapest month to fly from San Diego International to Seattle

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

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Direct flights from San Diego International to Seattle

Alternative San Diego International to Seattle routes

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

San Diego to Seattle: Flight information

The things to know before you go.

Cheapest flight found	$249
Cheapest month to fly	August
Average flight time	3 hrs, 5 mins
Most popular airline	Qatar Airways
Average flights per week	458

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

How many airports are there in Seattle?

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.

How much are return flights from San Diego International to Seattle?

The best price we found for a return flight from San Diego International to Seattle is $249. 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.

How long does it take to fly from San Diego International to Seattle?

3 hours and 5 minutes is the average flight time from San Diego International to Seattle.

Which airlines fly direct from San Diego International to Seattle?

Qatar Airways, Alaska Airlines and Delta fly direct from San Diego International to Seattle.

How many flights are there a week from San Diego International to Seattle?

As of June 2026, there are 462 flights per week flying from San Diego International to Seattle.

When is the cheapest time to fly from San Diego International to Seattle?

The cheapest month to fly from San Diego International to Seattle is usually August.

Which is the cheapest airport to fly into in Seattle?

If you're flying from San Diego International Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from $249.

Which upcoming date is cheapest to fly from San Diego International Airport to Seattle on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Diego International Airport to Seattle on Tuesday, 11 August 2026.

Can I get a direct flight from San Diego International Airport to Seattle?

Yes – the average flight time is 3 hours and 5 minutes.

How can I get the best flight deal from San Diego International Airport to Seattle?

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 Seattle 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.

When is the best time to book flights to Seattle?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Seattle?

In June, the average temperature is usually around 14°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.

Which is the cheapest airline to fly from San Diego International Airport to Seattle with?

Currently, Alaska Airlines offers the cheapest flight tickets to Seattle.

Flying from San Diego International Airport (SAN) to Seattle: what you need to know

Approximately 2 hours 50 minutes is how long you can expect to be in the air on a direct flight from San Diego International Airport to Seattle.
Seattle's timezone is UTC-8, which is the same as San Diego (the location of San Diego International Airport).
Pick from 90 services a week between San Diego International Airport (SAN) and Seattle-Tacoma International Airport (SEA). This is the most popular flight route.
For a relaxed start to your SAN to Seattle flight, leave enough time to check in and find your gate. Arriving two hours ahead of international departures and an hour before domestic flights is the standard rule.
Flying during a peak month such as July? Public holidays and other high seasons can lead to longer lines at security. Be extra cautious and get there up to four hours before an international flight and two hours before domestic departures.
Direct San Diego International Airport to Seattle tickets are available for booking. Seattle-Tacoma International Airport (SEA) is where you'll be touching down.
You can choose from various carriers that operate direct flights from San Diego International Airport to Seattle, including:
Travelling from central San Diego to SAN takes about 25 minutes by public transport. If you drive, ride-share or grab a taxi, you'll cover the 3 kilometres in 15 minutes or so, depending on traffic conditions.
Planning to catch an early flight from San Diego International Airport to Seattle? Avoid the hassle of rushing to the airport (and sneak in some extra precious sleep) by choosing one of these hotels close to SAN:
When it comes to the on-time performance of San Diego International Airport, data shows 74% of flights arrive within the scheduled time frame.
You'll find SAN at N Harbour Dr.

How to find the cheapest flights from San Diego International Airport (SAN) to Seattle

$133 is currently the best price for a one-way San Diego International Airport to Seattle flight. Return plane tickets start at $249. These prices can change depending on demand.
To pick up cheap flights from SAN to Seattle, book as early as possible. Airlines tend to offer lower prices when flights are first released.
If you're willing to be flexible with your travel plans, make the most of the 'Whole month' search tool. It'll give you the cheapest price across every month when looking for your San Diego International Airport to Seattle ticket.
You don't need to check every day to see if fares have dropped when you create a Price Alert. We'll notify you the moment there's an extra saving on cheap flights from SAN to Seattle.
Find an affordable flight from San Diego International Airport to Seattle with the help of our filters. Choose your preferred times, airlines and number of stops, then sort the results by 'Cheapest' to see the best deals.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport (SEA) is around 23 kilometres from the centre of Seattle. If you're getting a taxi or a ride-share, the drive will take roughly 25 minutes.
It typically takes 35 minutes to get there by public transport.
Consider staying in a hotel close to SEA if you're coming in on a late flight from San Diego International Airport to Seattle. Select one of these accommodation options and avoid the hassle of a long transfer:
For the best deal, book your vehicle from Seattle-Tacoma International Airport about one week in advance of your flight from SAN to Seattle.

Seattle Paine Field International Airport (PAE)

Seattle Paine Field International Airport (PAE) is about 40 kilometres from the centre of Seattle. Following your flight from San Diego International Airport to Seattle, it'll take you around 40 minutes to get to the heart of the city in a ride-share or taxi.
If you choose to travel on public transport, the journey will take you 1 hour 30 minutes or so.
There are some great places to rest your head close to PAE. Tuck yourself in and get cosy after your SAN to Seattle flight at any of these perfectly located options:
Avoid the slow-moving lines and paperwork at the rental desk by completing your booking beforehand. Reserve your ride from PAE in advance so you can just get the keys and go.

King County International Airport (BFI)

King County International Airport (BFI) is about 11 kilometres from the centre of Seattle. It'll take you about 20 minutes to reach the city centre by car once you've hopped off your flight from San Diego International Airport to Seattle.
If you go by public transport, the journey takes about 35 minutes.
If you don't want to make the journey into the centre, find a hotel close to BFI. Get settled at one of these stays after your SAN to Seattle flight:
Booking at least a few weeks ahead of your flight from San Diego International Airport to Seattle is always a good idea. Along with better prices, you might find it easier to get the make and model you prefer at BFI.

Best time to go to Seattle

It's time to pick your travel dates for your flight from San Diego International Airport to Seattle. July is the most popular month to visit Seattle. If you want a more relaxed atmosphere, go in December.
Lock in a San Diego International Airport to Seattle plane ticket with a departure in August to explore the city during its warmest month. You can expect temperatures to range from 12ºC to 28ºC.
Look for cheap tickets from SAN to Seattle in February if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -1ºC and 11ºC on average.

More about Seattle

Start your Seattle trip off on the right foot by choosing the perfect place to stay. As soon as you've booked your flight from San Diego International Airport to Seattle, check out our selection of hotels including:
Every great journey has to include some sightseeing. Pike Place Market, Space Needle and Seattle Skyline are must-visits when exploring Seattle.

Explore more of the United States

You've seen Seattle, now it's time to explore other corners of the United States. Journey about 241 kilometres south to Portland to tick off its leading sights. From Portland Japanese Garden to Peninsula Park Rose Garden and Beyond Van Gogh Portland, there's plenty to keep you busy.
Spokane is another favourite destination in the United States and is around 370 kilometres east of Seattle. No trip is complete without visiting Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes.