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Cheap flights from San Diego to Seattle from C$ 122

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
17 Jun — 24 Jun1
1 adult

Cheapflights Tip: The best prices from San Diego to Seattle/Tacoma Intl are usually found in January or October, booked 63 days in advance, depart on a Monday or Tuesday and return on a Wednesday

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 12 June 2025.

Round-trip from

C$ 242

One-way from

C$ 122

Popular in

July

Cheapest in

January

Average price

C$ 373

Good one-way deal

C$ 206 or less
Delta
  • Delta
  • 13/8-19/8
  • Nonstop
  • 6h 05m total
  • San Diego to Seattle
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Delta
  • Delta
  • 12/8
  • Nonstop
  • 3h 04m total
  • San Diego to Seattle
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Highest demand for flights based on searches. 14% potential increase in price (C$ 71 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 11 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a one-way flight from San Diego to Seattle/Tacoma Intl.
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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 12 June 2025.

Wed 13/81:57 p.m.SAN - SEA
Nonstop2h 53mDelta
Sat 16/811:40 a.m.SEA - SAN
Nonstop3h 00mDelta
Deal found 11/6C$ 242
Sat 23/81:15 p.m.SAN - SEA
1 stop5h 41mAlaska Airlines
Wed 27/84:12 p.m.SEA - SAN
Nonstop2h 51mAlaska Airlines
Deal found 10/6C$ 256
Tue 19/88:30 a.m.SAN - SEA
1 stop6h 40mSouthwest
Tue 26/88:00 a.m.SEA - SAN
1 stop4h 20mSouthwest
Deal found 11/6C$ 263
Fri 4/712:41 p.m.SAN - SEA
1 stop7h 49mHawaiian Airlines
Tue 8/77:59 p.m.SEA - SAN
Nonstop2h 56mHawaiian Airlines
Deal found 10/6C$ 365
Sat 18/1011:08 a.m.SAN - SEA
2 stops10h 07mUnited Airlines
Tue 21/105:31 p.m.SEA - SAN
1 stop6h 44mUnited Airlines
Deal found 10/6C$ 386
Sat 5/78:10 a.m.SAN - SEA
1 stop4h 48mMultiple Airlines
Mon 7/77:59 p.m.SEA - SAN
Nonstop2h 56mMultiple Airlines
Deal found 12/6C$ 536

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 12 June 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

Wed 13/8

11:10 a.m.-2:16 p.m.

Nonstop3h 06m

Seattle/Tacoma Intl

Tue 19/8

10:03 a.m.-1:02 p.m.

Nonstop2h 59m

C$ 242

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 19/8

8:30 a.m.-3:10 p.m.

1 stop6h 40m

Seattle/Tacoma Intl

Tue 26/8

8:00 a.m.-12:20 p.m.

1 stop4h 20m

C$ 263

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 6/8

6:15 a.m.-11:26 a.m.

1 stop5h 11m

Seattle/Tacoma Intl

Wed 13/8

11:41 a.m.-2:38 p.m.

Nonstop2h 57m

C$ 273

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sun 20/7

6:15 a.m.-1:46 p.m.

1 stop7h 31m

Seattle/Tacoma Intl

Sun 27/7

5:10 a.m.-10:12 a.m.

1 stop5h 02m

C$ 338

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 2/7

8:45 p.m.-11:44 p.m.

Nonstop2h 59m

Seattle/Tacoma Intl

Fri 11/7

9:03 p.m.-11:59 p.m.

Nonstop2h 56m

C$ 399

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 12/8

7:30 a.m.-10:34 a.m.

Nonstop3h 04m

C$ 122

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 16/8

12:23 p.m.-5:10 p.m.

1 stop4h 47m

C$ 134

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 14/8

8:00 a.m.-2:48 p.m.

1 stop6h 48m

C$ 148

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Mon 20/10

8:00 a.m.-3:00 p.m.

1 stop7h 00m

C$ 149

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 3/7

7:27 p.m.-12:59 a.m.

1 stop5h 32m

C$ 170

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/6

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 9 June 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 63 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 12 June 2025.

A simple way to save on the total cost of your ticket is to fly from San Diego to Seattle in the afternoon. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight at noon.

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 12 June 2025.

The most flights from SAN to SEA are scheduled on a Thursday (62 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (25 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 12 June 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
10,000 reviews
Check prices

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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, Delta (C$ 242), Southwest (C$ 263), and Alaska Airlines (C$ 273) offers the cheapest pricing from San Diego to Seattle. Delta is 24% 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 Delta, which is currently one of the cheapest options available, starting at C$ 122. Alaska Airlines flights start at C$ 134 while deals on Southwest start at C$ 149 one-way.

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

    Consider Sun Country Air (100%), Scandinavian Airlines (100%) or KLM (93%) 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$ 174. While the most popular route (San Diego - Seattle/Tacoma Intl) can be booked for C$ 533 on average our data indicates C$ 712 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
Leavenworth
Tukwila
SeaTac
Tacoma
Marysville
Bothell
Renton
Olympia
Lynnwood

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