Cheap Flights from San Diego to Seattle

Compare San Diego 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 to Seattle

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

Seattle.$163 per passenger.Departing Tue, 17 Mar, returning Tue, 24 Mar.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Tue, 17 Mar, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Tue, 24 Mar, arriving in San Diego International.Price includes taxes and charges.From $163, select.

Seattle.$163 per passenger.Departing Tue, 14 Apr, returning Sun, 19 Apr.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from San Diego International on Tue, 14 Apr, arriving in Seattle / Tacoma International.Inbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Sun, 19 Apr, arriving in San Diego International.Price includes taxes and charges.From $163, select.

Seattle.$163 per passenger.Departing Sun, 3 May, returning Wed, 6 May.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from San Diego International on Sun, 3 May, arriving in Seattle / Tacoma International.Inbound direct flight with Southwest Airlines departs from Seattle / Tacoma International on Wed, 6 May, arriving in San Diego International.Price includes taxes and charges.From $163, select.

Seattle.$195 per passenger.Departing Tue, 24 Mar, returning Wed, 1 Apr.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from San Diego International on Tue, 24 Mar, arriving in Seattle / Tacoma International.Inbound indirect flight with Southwest Airlines, departs from Seattle / Tacoma International on Wed, 1 Apr, arriving in San Diego International.Price includes taxes and charges.From $195, select.

Seattle.$196 per passenger.Departing Thu, 30 Apr, returning Sun, 3 May.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Thu, 30 Apr, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Sun, 3 May, arriving in San Diego International.Price includes taxes and charges.From $196, select.

Seattle.$314 per passenger.Departing Tue, 24 Mar, returning Wed, 1 Apr.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Tue, 24 Mar, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Wed, 1 Apr, arriving in San Diego International.Price includes taxes and charges.From $314, select.

Seattle.$338 per passenger.Departing Wed, 20 May, returning Tue, 16 Jun.Return flight with Delta.Outbound direct flight with Delta departs from San Diego International on Wed, 20 May, arriving in Seattle / Tacoma International.Inbound direct flight with Delta departs from Seattle / Tacoma International on Tue, 16 Jun, arriving in San Diego International.Price includes taxes and charges.From $338, select.

Seattle.$373 per passenger.Departing Fri, 27 Feb, returning Sat, 28 Feb.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Diego International on Fri, 27 Feb, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sat, 28 Feb, arriving in San Diego International.Price includes taxes and charges.From $373, select.

Find the cheapest month to fly from San Diego to Seattle

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

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Direct flights from San Diego to Seattle

Alternative San Diego to Seattle routes

Looking for the cheapest, fastest or easiest route from San Diego 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	$163
Cheapest month to fly	May
Average flight time	3 hrs, 11 mins
Most popular airline	Alaska Airlines
Average flights per week	1,528

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Vermithor's Bronze Ember Sweet Suite

2.68 km from city centre

$201

Per night

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Modern Sustainable Design in Ballard

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Finding cheap flights from San Diego 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 to Seattle?

The best price we found for a return flight from San Diego to Seattle is $163. 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 to Seattle?

3 hours and 11 minutes is the average flight time from San Diego to Seattle.

Which airlines fly direct from San Diego to Seattle?

Alaska Airlines, Qatar Airways and Air Tahiti Nui fly direct from San Diego to Seattle.

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

As of February 2026, there are 1,528 flights per week flying from San Diego to Seattle.

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

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

Which is the cheapest airport to fly into in Seattle?

If you're flying from San Diego, 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 $163.

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

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from San Diego to Seattle on Sunday, 3 May 2026.

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

Yes – the average flight time is 3 hours and 11 minutes.

How can I get the best flight deal from San Diego 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 February, the average temperature is usually around 4°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 to Seattle with?

The cheapest airline that flies to Seattle is Southwest Airlines .

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

Set off on your next big adventure from one of San Diego's main airports, San Diego International Airport (SAN) or McClellan-Palomar Airport (CLD). Check out your options for booking a flight from San Diego to Seattle setting off from either of these.
Disembark at Seattle-Tacoma International Airport (SEA). This is how most airline passengers arrive in Seattle.
Around 3 hours 5 minutes is how long you can expect to be in the air on a direct San Diego to Seattle flight.
Seattle's timezone is UTC-7, which is the same as San Diego.
San Diego International Airport (SAN) to Seattle-Tacoma International Airport (SEA) is the most popular route that connects these two cities. There are 91 weekly departures to pick from. If you have things to do before heading off, the last flight from San Diego to Seattle is with Alaska Airlines at 20:50. Opt for the first SAN to SEA departure operated by Alaska Airlines at 06:15 to make the most of your first day in Seattle.
For stress-free travel, arrive at the airport two hours ahead of international flights and an hour before domestic departures. That way, you won't have to rush to catch your San Diego to Seattle flight.
Flying over a peak time such as July? School holidays and other popular seasons can mean longer queues at check-in and security. Play it safe and get there up to four hours before an international flight and two hours before domestic departures.

How to find the cheapest flights from San Diego to Seattle

At the moment, $81 is the lowest price we've found for a one-way ticket from San Diego to Seattle. The cheapest price for a return flight is $163. Keep in mind fares can change due to availability at the time of booking.
To snag cheap San Diego to Seattle flights, reserve your trip two months ahead of your departure.
The best month for finding cheap plane tickets from San Diego to Seattle is May. Use the 'Whole month' tool to compare prices, then select the dates that offer the lowest fares.
Snapping up a cheap flight from San Diego to Seattle is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll get in touch when the price has dropped.
Save on your San Diego to Seattle flight with the help of our filters. Select your ideal duration, departure time and airlines, then sort the results by 'Cheapest' to see the best deals.

Flying from San Diego

San Diego International Airport (SAN)

You can get a direct flight from San Diego to Seattle departing from San Diego International Airport (SAN). Start your journey at SAN and land at Seattle-Tacoma International Airport (SEA).
Alaska Airlines is a well-known carrier that offers direct San Diego to Seattle plane tickets from SAN.
SAN is around 3 kilometres from central San Diego. If you're ride-sharing, catching a cab or driving from the centre, it'll take 10 minutes or so to get there, depending on the traffic. If you're planning to take public transport, expect the trip time to be around 20 minutes.
Need a convenient hotel near San Diego International Airport? If you've booked an early flight from San Diego to Seattle, these stays will have you sleeping moments from your departure gate:
When it comes to the on-time performance of San Diego International Airport, data shows 71.38% of flights complete their journey on time.
SAN's address is N Harbour Dr.

Arriving in Seattle

Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport (SEA) is approximately 19 kilometres from the centre of Seattle. If you're catching a cab or a ride-share, the drive takes roughly 20 minutes.
If you're taking public transport, expect a journey time of roughly 55 minutes.
If you have a late flight from San Diego to Seattle, nothing beats the convenience of staying close to the terminal. Grab your bags from the carousel and then be showered and snoozing soon after at one of these hotels near SEA:
Pick up a Seattle-Tacoma International Airport rental car and explore Seattle and beyond with your own wheels. Thrifty, Europcar and Budget are well-known companies you can book with here.
Reserving your vehicle from Seattle-Tacoma International Airport about one week ahead increases your chances of getting a good deal.

Lake Union Sea Plane Base Airport (LKE)

Once your flight from San Diego to Seattle has hit the tarmac, you can reach the city centre in about 10 minutes by car. Central Seattle is roughly 3 kilometres from Lake Union Sea Plane Base Airport (LKE).
Travelling by public transport will take around 25 minutes.
After your flight from San Diego to Seattle, kick back at a hotel close to LKE. These are some great options that'll help you sink into relaxation mode:

Best time to go to Seattle

July is the most popular month for flights from San Diego to Seattle. To escape the crowds, go to Seattle in May.
When booking your San Diego to Seattle tickets, consider what kind of weather you prefer. August is the warmest month in Seattle, with temperatures ranging from 12ºC to 28ºC.
Look for cheap flights from San Diego to Seattle in February if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between -1ºC and 11ºC on average.

More about Seattle

Once you've booked your flight from San Diego to Seattle, choose a hotel that puts you where you want to be. Make one of these options your base for exploring Seattle:
There are so many things to explore in this city it can be hard to know where to begin. Greyhound: Bus Station, LMN Architects and Boeing Radiation Effects Lab are leading attractions which should feature on any well-planned Seattle itinerary.

Explore more of United States

You've done Seattle, now it's time to discover other corners of United States. Journey about 241 kilometres south to Portland to tick off its must-visit sights. From Pioneer Courthouse Square to Portland Japanese Garden and Pittock Mansion, there's plenty to keep you busy.
Spokane is another well-known destination in United States and is around 370 kilometres east of Seattle. No journey is complete without seeing Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.