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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 24/5. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
4 May — 11 May1
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 29 April 2025.

Round-trip from

C$ 231

One-way from

C$ 122

Popular in

July

Cheapest in

January

Average price

C$ 363

Good one-way deal

C$ 136 or less
Alaska Airlines
  • Alaska Airlines
  • 22/5-24/5
  • 1 total stop
  • 13h 07m total
  • San Diego to Seattle
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Alaska Airlines
  • Alaska Airlines
  • 24/5
  • 1 total stop
  • 4h 17m total
  • San Diego to Seattle
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (C$ 75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 11 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 29 April 2025.

Thu 22/56:15 a.m.SAN - SEA
Nonstop3h 09mAlaska Airlines
Sat 24/511:21 a.m.SEA - SAN
1 stop9h 58mAlaska Airlines
Deal found 28/4C$ 231
Fri 23/54:59 p.m.SAN - SEA
Nonstop3h 01mHawaiian Airlines
Tue 27/56:59 p.m.SEA - SAN
Nonstop2h 46mHawaiian Airlines
Deal found 27/4C$ 259
Fri 23/57:15 p.m.SAN - SEA
Nonstop3h 10mDelta
Mon 26/57:30 a.m.SEA - SAN
Nonstop2h 50mDelta
Deal found 28/4C$ 273
Thu 21/88:00 a.m.SAN - SEA
1 stop7h 14mUnited Airlines
Sun 24/87:34 p.m.SEA - SAN
1 stop4h 41mUnited Airlines
Deal found 28/4C$ 317
Fri 30/53:00 p.m.SAN - SEA
2 stops7h 30mSouthwest
Sun 1/65:30 a.m.SEA - SAN
1 stop4h 45mSouthwest
Deal found 28/4C$ 432

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 29 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

Thu 22/5

6:15 a.m.-9:24 a.m.

Nonstop3h 09m

Seattle/Tacoma Intl

Sat 24/5

11:21 a.m.-9:19 p.m.

1 stop9h 58m

C$ 231

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 23/5

4:59 p.m.-8:00 p.m.

Nonstop3h 01m

Seattle/Tacoma Intl

Tue 27/5

6:59 p.m.-9:45 p.m.

Nonstop2h 46m

C$ 259

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 23/5

7:15 p.m.-10:25 p.m.

Nonstop3h 10m

Seattle/Tacoma Intl

Mon 26/5

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

Nonstop2h 50m

C$ 273

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Thu 21/8

8:00 a.m.-3:14 p.m.

1 stop7h 14m

Seattle/Tacoma Intl

Sun 24/8

7:34 p.m.-12:15 a.m.

1 stop4h 41m

C$ 317

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 30/5

3:00 p.m.-10:30 p.m.

2 stops7h 30m

Seattle/Tacoma Intl

Sun 1/6

5:30 a.m.-10:15 a.m.

1 stop4h 45m

C$ 432

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 24/5

5:18 p.m.-9:35 p.m.

1 stop4h 17m

C$ 122

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sun 1/6

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

Nonstop3h 16m

C$ 123

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 3/6

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

2 stops9h 56m

C$ 130

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 13/6

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

1 stop5h 30m

C$ 137

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 23/5

4:59 p.m.-8:00 p.m.

Nonstop3h 01m

C$ 151

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

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 25 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 29 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 29 April 2025.

The most flights from SAN to SEA are scheduled on a Monday (63 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (34 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 29 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
9,949 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

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
9,949 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

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
4,292 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

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
7,929 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

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
2,402 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,949 reviews
Check prices

Entertainment

7.1

Comfort

7.9

Boarding

8.2

Food

7.1

Crew

8.5

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$ 231), Delta (C$ 245), and Hawaiian Airlines (C$ 259) offers the cheapest pricing from San Diego to Seattle. Alaska Airlines is 29% 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 Alaska Airlines, which is currently one of the cheapest options available, starting at C$ 122. Delta flights start at C$ 123 while deals on United Airlines start at C$ 130 one-way.

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

    Consider Sun Country Air (100%), KLM (94%) or Air France (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$ 136. While the most popular route (San Diego - Seattle/Tacoma Intl) can be booked for C$ 362 on average our data indicates C$ 137 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
Tukwila
SeaTac
Tacoma
Marysville
Bothell
Olympia
Lynnwood
Leavenworth

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