Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from San Diego to Seattle from C$ 125

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/5. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
16 Apr — 23 Apr1
1 adult

Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or October, booked 42 days in advance, depart on a Monday or Wednesday and return on a Tuesday

Cheap flight deals from San Diego to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 11 April 2025.

Round-trip from

C$ 226

One-way from

C$ 125

Popular in

July

Cheapest in

January

Average price

C$ 355

Good one-way deal

C$ 259 or less
Alaska Airlines
  • Alaska Airlines
  • 13/5-13/5
  • 1 total stop
  • 8h 54m total
  • San Diego to Seattle
Search Deals
Hawaiian Airlines
  • Hawaiian Airlines
  • 23/5
  • Nonstop
  • 3h 07m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a one-way flight from San Diego to Seattle/Tacoma Intl.
Search Deals

Find flight deals from San Diego to Seattle

Cheapest flights from San Diego to Seattle
Explore the most affordable flight options available from San Diego to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 April 2025.

Tue 13/59:00 a.m.SAN - SEA
Nonstop3h 08mAlaska Airlines
Tue 13/52:33 p.m.SEA - SAN
1 stop5h 46mAlaska Airlines
Deal found 10/4C$ 226
Sat 10/57:20 a.m.SAN - SEA
Nonstop3h 16mDelta
Tue 13/511:30 a.m.SEA - SAN
Nonstop2h 52mDelta
Deal found 10/4C$ 234
Tue 6/52:30 p.m.SAN - SEA
2 stops7h 01mUnited Airlines
Tue 13/55:13 p.m.SEA - SAN
1 stop6h 46mUnited Airlines
Deal found 10/4C$ 256
Sat 10/56:33 a.m.SAN - SEA
1 stop6h 10mHawaiian Airlines
Sun 11/59:15 p.m.SEA - SAN
Nonstop2h 44mHawaiian Airlines
Deal found 11/4C$ 267
Fri 13/67:55 p.m.SAN - SEA
1 stop5h 30mSouthwest
Mon 16/65:15 a.m.SEA - SAN
1 stop4h 35mSouthwest
Deal found 10/4C$ 277

Cheapflights Fare Finder

Customize your flight search to find flights from San Diego to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 11 April 2025.
Use the filters below to find and compare flights from San Diego to Seattle that are best for you.

Fly from

San Diego

Fly to

Seattle

Route

Depart

Return

Price

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 13/5

9:00 a.m.-12:08 p.m.

Nonstop3h 08m

Seattle/Tacoma Intl

Tue 13/5

2:33 p.m.-8:19 p.m.

1 stop5h 46m

C$ 226

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 10/5

7:20 a.m.-10:36 a.m.

Nonstop3h 16m

Seattle/Tacoma Intl

Sun 18/5

7:30 p.m.-10:20 p.m.

Nonstop2h 50m

C$ 234

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 6/5

2:30 p.m.-9:31 p.m.

2 stops7h 01m

Seattle/Tacoma Intl

Tue 13/5

5:13 p.m.-11:59 p.m.

1 stop6h 46m

C$ 256

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 10/5

6:33 a.m.-11:18 a.m.

1 stop4h 45m

Seattle/Tacoma Intl

Sun 18/5

9:15 p.m.-11:59 p.m.

Nonstop2h 44m

C$ 267

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 13/6

7:55 p.m.-1:25 a.m.

1 stop5h 30m

Seattle/Tacoma Intl

Mon 16/6

5:15 a.m.-9:50 a.m.

1 stop4h 35m

C$ 277

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 23/5

8:50 p.m.-11:57 p.m.

Nonstop3h 07m

C$ 125

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 28/5

11:15 a.m.-9:11 p.m.

2 stops9h 56m

C$ 132

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 13/6

7:55 p.m.-1:25 a.m.

1 stop5h 30m

C$ 139

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sun 25/5

6:15 a.m.-11:35 a.m.

1 stop5h 20m

C$ 142

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 25/6

11:12 a.m.-2:24 p.m.

Nonstop3h 12m

C$ 181

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Best time to book a flight from San Diego to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from San Diego with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Diego to Seattle

How far ahead should I book a flight from San Diego to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from San Diego to Seattle. Price data was last updated on 4 April 2025.

The price you pay for your flight from San Diego to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from San Diego to Seattle?

Currently, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of C$ 261). Flying from San Diego to Seattle in December is currently the most expensive (average of C$ 353). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SAN to SEA?

Find hourly flight availability from San Diego to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 April 2025.

A simple way to save on the total cost of your ticket is to fly from San Diego to Seattle at noon. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight in the morning.

Weekly flight availability from San Diego to Seattle

Explore weekly flight availability from San Diego to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 11 April 2025.

The most flights from SAN to SEA are scheduled on a Friday (59 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 11 April 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from San Diego to Seattle. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,851 reviews
Check prices

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,851 reviews
Alaska Airlines
8.0
Very good
9,851 reviews
Check prices

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,851 reviews
Check prices

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,911 reviews
Alaska Airlines
8.0
Very good
9,851 reviews
Check prices

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,365 reviews
Alaska Airlines
8.0
Very good
9,851 reviews
Check prices

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,636 reviews
Alaska Airlines
8.0
Very good
9,851 reviews
Check prices

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from San Diego to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this San Diego to Seattle flight route?

    Flights from San Diego to Seattle/Tacoma Intl have been viewed 3 times in the past calendar month.

  • What are the cheapest airlines flying from San Diego to Seattle round-trip?

    According to our current data, Alaska Airlines (C$ 226), Delta (C$ 234), and United Airlines (C$ 256) offers the cheapest pricing from San Diego to Seattle. Alaska Airlines is 31% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from San Diego to Seattle one-way?

    To fly one-way, consider booking your trip with Hawaiian Airlines, which is currently one of the cheapest options available, starting at C$ 125. United Airlines flights start at C$ 132 while deals on Southwest start at C$ 139 one-way.

  • What are the most reliable airlines from San Diego to Seattle?

    Consider WestJet (93%), Air France (93%) or KLM (92%) when booking your flight. These represent the most reliable airlines when flying from San Diego to Seattle.

  • What are the cheapest flights from San Diego to Seattle?

    Looking at all options, your cheapest flight can be booked for C$ 138. While the most popular route (San Diego - Seattle/Tacoma Intl) can be booked for C$ 493 on average our data indicates C$ 312 when flying from San Diego to Seattle.

  • Can I find deals for flights from San Diego to Seattle that include hotel bookings?

    Yes. In addition to deals on San Diego to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Diego to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Seattle.

  • Can I find deals for business class flights from San Diego to Seattle?

    Yes. Cheapflights offers flight deals from San Diego to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Diego to Seattle?

    Currently, January is the cheapest month in which you can book a flight from San Diego to Seattle (average of C$ 261). Flying from San Diego to Seattle in December is currently the most expensive (average of C$ 353). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
SeaTac
Tukwila
Marysville
Bothell
Leavenworth
Tacoma
Olympia
Lynnwood

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Diego to Seattle?

Cheapflights helps you search for flights from San Diego to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from San Diego to Seattle?

Cheapflights helps you find that perfect flight to Seattle from San Diego by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from San Diego to Seattle with no change fees?

Certainly. Search results for flights to Seattle from San Diego shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from San Diego to Seattle become cheaper?

Of course! You can now track prices for flights from San Diego to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.