How popular is this San Diego to Seattle flight route?

Within the past month, 121 users have taken a look at flights from San Diego to Seattle/Tacoma Intl.

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

Flying on Spirit Airlines is currently your cheapest option to Seattle, with prices starting at $161. Additional round-trip tickets that might be worth considering are offered by Hawaiian Airlines and Alaska Airlines, with the lowest prices starting at $165 and $167, respectively. Spirit Airlines is priced at 31% lower than the current average price of a flight leaving 3 months from now.

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

For one-way options, check prices for Hawaiian Airlines. According to our data, you can fly for as low as $89. Users have also found prices from $90 and $95 on Spirit Airlines and Frontier, respectively.

What are the cheapest flights from San Diego to Seattle?

While on average a flight from San Diego to Seattle is generally $979, our data shows the cheapest flight currently is $89. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay $93 for that flight.

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 most popular airlines that fly from San Diego to Seattle?

American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from San Diego to Seattle.

What is the cheapest day to fly round-trip from San Diego to Seattle?

Thursday is generally a great day to depart. Flying on this day could help you save up to 65%.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 43 days in advance, which can save you up to 202% on flights from San Diego to Seattle compared to booking the week you need them. Waiting 43 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $417. For sooner than that we have options available in the next 3 days from $542.

What is the cheapest month to fly from San Diego to Seattle?

Flights from San Diego to Seattle lean towards being more expensive in July. Prices are generally better when you fly from San Diego to Seattle in January, with the cheapest ticket starting at $97.

Most accurate provider : When it comes to deals on San Diego-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Diego-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Diego-Seattle flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on San Diego-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airports do I use to fly from San Diego to Seattle?

If you book a flight from San Diego to Seattle, you will be flying from San Diego to Seattle/Tacoma Intl. Flights to Seattle/Tacoma Intl (SEA) from San Diego (SAN) take 2h 56m for a nonstop flight. There are 40 flights from San Diego to Seattle per day from 9 airlines.

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.

$89+ Flights from San Diego to Seattle

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Find cheap flights from San Diego to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 Friday or Thursday and return on a Tuesday

Cheap flight deals from San Diego to Seattle

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$161 (Cheapflightsfares)
One-way from	$89 (Hawaiian Airlines)
Popular in	July
Cheapest in	January
Average price	$253
Good round-trip deal	$248 or less
Good one-way deal	$139 or less

Provider with most accurate pricing for San Diego-Seattle/Tacoma Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for San Diego-Seattle/Tacoma Intl flights.

Search Deals

From San Diego to Seattle/Tacoma Intl

Search Deals

One-way flight from San Diego to Seattle/Tacoma Intl

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($40 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from San Diego to Seattle/Tacoma Intl.

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 April 11, 2025.

Sat 5/176:15 amSAN - SEA

1 stop8h 10mSpirit Airlines

Sun 5/256:00 amSEA - SAN

1 stop12h 03mSpirit Airlines

Deal found 4/11

$161

Sat 5/1712:45 pmSAN - SEA

1 stop6h 25mHawaiian Airlines

Sun 5/186:00 amSEA - SAN

Nonstop2h 42mHawaiian Airlines

Deal found 4/9

$165

Wed 5/142:00 pmSAN - SEA

Nonstop3h 03mAlaska Airlines

Fri 5/169:15 pmSEA - SAN

Nonstop2h 44mAlaska Airlines

Deal found 4/10

$167

Wed 4/306:25 amSAN - SEA

1 stop18h 19mMultiple Airlines

Sun 5/48:56 pmSEA - SAN

1 stop10h 38mMultiple Airlines

Deal found 4/11

$170

Fri 5/91:55 pmSAN - SEA

Nonstop3h 05mDelta

Sun 5/1110:10 amSEA - SAN

Nonstop2h 50mDelta

Deal found 4/11

$177

Sat 4/261:10 pmSAN - SEA

1 stop11h 34mFrontier

Wed 4/306:00 amSEA - SAN

1 stop6h 10mFrontier

Deal found 4/11

$178

Wed 5/142:30 pmSAN - SEA

2 stops7h 01mUnited Airlines

Sun 5/186:15 amSEA - SAN

1 stop7h 31mUnited Airlines

Deal found 4/10

$192

Best flights from San Diego to Seattle
Discover carefully curated flight deals from San Diego to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 11, 2025.

Sat 5/176:15 amSAN - SEA

1 stop8h 10mSpirit Airlines

Sun 5/256:00 amSEA - SAN

1 stop12h 03mSpirit Airlines

Deal found 4/11

$161

Sat 5/1712:45 pmSAN - SEA

1 stop6h 25mHawaiian Airlines

Sun 5/186:00 amSEA - SAN

Nonstop2h 42mHawaiian Airlines

Deal found 4/9

$165

Wed 5/149:00 amSAN - SEA

Nonstop3h 08mAlaska Airlines

Sun 5/189:15 pmSEA - SAN

Nonstop2h 44mAlaska Airlines

Deal found 4/10

$167

Wed 4/306:25 amSAN - SEA

1 stop18h 19mMultiple Airlines

Sun 5/48:56 pmSEA - SAN

1 stop10h 38mMultiple Airlines

Deal found 4/11

$170

Fri 5/91:55 pmSAN - SEA

Nonstop3h 05mDelta

Sun 5/1110:10 amSEA - SAN

Nonstop2h 50mDelta

Deal found 4/11

$177

Sat 4/261:10 pmSAN - SEA

1 stop11h 34mFrontier

Tue 4/296:00 amSEA - SAN

1 stop6h 10mFrontier

Deal found 4/11

$178

Wed 5/142:30 pmSAN - SEA

2 stops7h 01mUnited Airlines

Sun 5/186:15 amSEA - SAN

1 stop7h 31mUnited Airlines

Deal found 4/10

$192

Last-minute flights from San Diego to Seattle
Discover last-minute flight deals from San Diego to Seattle. Data last updated April 11, 2025 and is based on user searches.

Sat 4/126:29 amSAN - SEA

1 stop7h 34mAmerican Airlines

Mon 4/142:58 pmSEA - SAN

1 stop6h 39mAmerican Airlines

Deal found 4/8

$307

Wed 4/1612:19 pmSAN - SEA

1 stop23h 37mFrontier

Tue 4/226:00 amSEA - SAN

1 stop6h 06mFrontier

Deal found 4/10

$188

Wed 4/169:08 pmSAN - SEA

1 stop14h 27mMultiple Airlines

Tue 4/226:00 amSEA - SAN

1 stop18h 14mMultiple Airlines

Deal found 4/9

$233

Wed 4/169:30 amSAN - SEA

Nonstop3h 10mHawaiian Airlines

Wed 4/2310:13 amSEA - SAN

Nonstop2h 47mHawaiian Airlines

Deal found 4/10

$577

Thu 4/176:15 amSAN - SEA

1 stop5h 20mSpirit Airlines

Sun 4/208:56 pmSEA - SAN

1 stop27h 46mSpirit Airlines

Deal found 4/10

$244

Fri 4/188:53 amSAN - SEA

1 stop6h 24mAlaska Airlines

Fri 4/185:59 pmSEA - SAN

Nonstop2h 47mAlaska Airlines

Deal found 4/10

$441

Fri 4/181:30 pmSAN - SEA

Nonstop3h 13mDelta

Mon 4/217:15 amSEA - SAN

Nonstop2h 52mDelta

Deal found 4/10

$527

Sat 4/192:05 pmSAN - SEA

1 stop6h 05mSouthwest

Mon 4/214:30 pmSEA - SAN

2 stops6h 30mSouthwest

Deal found 4/10

$532

Sun 4/206:15 amSAN - SEA

1 stop7h 44mUnited Airlines

Sun 4/205:10 pmSEA - SAN

1 stop6h 49mUnited Airlines

Deal found 4/10

$601

Tue 4/2212:56 pmSAN - SEA

1 stop11h 48mFrontier

Wed 4/236:00 amSEA - SAN

1 stop6h 06mFrontier

Deal found 4/9

$178

Tue 4/2212:56 pmSAN - SEA

1 stop11h 48mMultiple Airlines

Mon 4/288:56 pmSEA - SAN

1 stop10h 38mMultiple Airlines

Deal found 4/9

$183

Fri 4/256:15 amSAN - SEA

1 stop13h 36mSpirit Airlines

Tue 5/612:30 pmSEA - SAN

1 stop7h 24mSpirit Airlines

Deal found 4/10

$162

One-way flights from San Diego to Seattle
Search for one-way flight options from San Diego to Seattle. Find affordable one-way fares based on user searches. Data last updated April 11, 2025.

Fri 5/238:50 pmSAN - SEA

Nonstop3h 07mHawaiian Airlines

Deal found 4/11

$89

Tue 4/298:29 amSAN - SEA

1 stop27h 06mSpirit Airlines

Deal found 4/10

$90

Tue 4/291:10 pmSAN - SEA

1 stop11h 34mFrontier

Deal found 4/11

$95

Fri 6/137:55 pmSAN - SEA

1 stop5h 30mSouthwest

Deal found 4/9

$99

Sun 5/256:15 amSAN - SEA

1 stop5h 20mAlaska Airlines

Deal found 4/10

$101

Tue 6/241:30 pmSAN - SEA

1 stop7h 41mUnited Airlines

Deal found 4/10

$115

Wed 7/911:05 amSAN - SEA

Nonstop3h 06mDelta

Deal found 4/11

$129

Wed 5/76:15 amSAN - SEA

3 stops26h 30mMultiple Airlines

Deal found 4/9

$225

Tue 4/151:00 pmSAN - SEA

1 stop7h 13mAmerican Airlines

Deal found 4/10

$354

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Diego to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 5/17

6:15 am-9:24 am

Nonstop3h 09m

Seattle/Tacoma Intl

Sat 5/17

12:00 pm-5:52 pm

1 stop5h 52m

$161

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 4/25

6:15 am-7:51 pm

1 stop13h 36m

Seattle/Tacoma Intl

Tue 5/6

12:30 pm-7:54 pm

1 stop7h 24m

$162

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 5/17

7:20 am-10:36 am

Nonstop3h 16m

Seattle/Tacoma Intl

Sun 5/18

7:30 pm-10:20 pm

Nonstop2h 50m

$167

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 4/22

12:56 pm-12:44 am

1 stop11h 48m

Seattle/Tacoma Intl

Wed 4/23

6:00 am-12:06 pm

1 stop6h 06m

$178

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 4/22

12:56 pm-12:44 am

1 stop11h 48m

Seattle/Tacoma Intl

Mon 4/28

8:56 pm-7:34 am

1 stop10h 38m

$183

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Wed 5/14

2:30 pm-9:31 pm

2 stops7h 01m

Seattle/Tacoma Intl

Sun 5/18

6:15 am-1:46 pm

1 stop7h 31m

$192

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 6/3

8:15 am-11:24 am

Nonstop3h 09m

Seattle/Tacoma Intl

Tue 7/1

6:59 pm-11:42 pm

1 stop4h 43m

$215

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Fri 5/23

8:50 pm-11:57 pm

Nonstop3h 07m

$89

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Tue 4/29

8:29 am-11:35 am

1 stop27h 06m

$90

San DiegoSeattle

SAN - SEA

SANSEA

San Diego

Sat 4/26

1:10 pm-12:44 am

1 stop11h 34m

$95

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Showing 1-10 of 16 results

Compare providers for flights from San Diego to Seattle

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Diego to Seattle in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
CheapTicketsDeal	Price Accuracy3 stars	Trust Score*3 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*2 stars
Cheapfaremart	Price Accuracy-	Trust Score*3 stars
Trip.com	Price Accuracy1 star	Trust Score*3 stars
Justfly.com	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on San Diego-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Diego-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Diego-Seattle flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on San Diego-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for San Diego to Seattle flights

Cheapflights partnered with top experts to bring you the best recommendations for your San Diego to Seattle trip

Airports

SAN

Plan to arrive at least two hours before your flight due to potential traffic congestion near SAN.

SEA

Use the Link light rail from SEA to downtown Seattle for a cost-effective, 40-minute journey.

Our travel experts

Blane Bachelor

Expert on SAN

Brandon Schultz

Expert on SEA

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?

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 $238). Flying from San Diego to Seattle in July is currently the most expensive (average of $411). 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?

It’s typically best to fly out from San Diego to Seattle in the evening. Doing so could potentially save you 28% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from San Diego to Seattle?

Travelers seeking maximum savings on their San Diego to Seattle flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Diego to Seattle

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from San Diego to Seattle, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,851 reviews

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

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

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

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

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

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

What airports do I use to fly from San Diego to Seattle?
If you book a flight from San Diego to Seattle, you will be flying from San Diego to Seattle/Tacoma Intl. Flights to Seattle/Tacoma Intl (SEA) from San Diego (SAN) take 2h 56m for a nonstop flight. There are 40 flights from San Diego to Seattle per day from 9 airlines.
How popular is this San Diego to Seattle flight route?
Within the past month, 121 users have taken a look at flights from San Diego to Seattle/Tacoma Intl.
What are the cheapest airlines flying from San Diego to Seattle round-trip?
Flying on Spirit Airlines is currently your cheapest option to Seattle, with prices starting at $161. Additional round-trip tickets that might be worth considering are offered by Hawaiian Airlines and Alaska Airlines, with the lowest prices starting at $165 and $167, respectively. Spirit Airlines is priced at 31% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from San Diego to Seattle one-way?
For one-way options, check prices for Hawaiian Airlines. According to our data, you can fly for as low as $89. Users have also found prices from $90 and $95 on Spirit Airlines and Frontier, respectively.
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?
While on average a flight from San Diego to Seattle is generally $979, our data shows the cheapest flight currently is $89. When looking at the most popular route, (San Diego - Seattle/Tacoma Intl), you can expect to pay $93 for that flight.
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 $238). Flying from San Diego to Seattle in July is currently the most expensive (average of $411). 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

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Other flights to Seattle

Top 8 airlines flying from San Diego to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$75	Average$167	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$94	Average$163	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$113	Average$391	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$117	Average$239	FlexibilityNo cancel fee	On-timeN/A
Alaska Airlines	Cheapest$135	Average$276	FlexibilityNo cancel fee	On-time75%
Hawaiian Airlines	Cheapest$162	Average$299	FlexibilityNo cancel fee	On-time85%
Southwest	Cheapest$196	Average$331	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$251	Average$511	FlexibilityNo cancel fee	On-time69%

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$89+ Cheap flights from San Diego to Seattle (SAN - SEA)

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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Diego to Seattle with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 Friday or Thursday and return on a Tuesday

Cheap flight deals from San Diego to Seattle

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

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Find flight deals from San Diego to Seattle

Cheapest flights from San Diego to SeattleExplore 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 April 11, 2025.

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 April 11, 2025.

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Use the filters below to find and compare flights from San Diego to Seattle that are best for you.

Compare providers for flights from San Diego to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Diego to Seattle in April.

The best insider tips for San Diego to Seattle flights

Cheapflights partnered with top experts to bring you the best recommendations for your San Diego to Seattle trip

Airports

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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.

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 April 4, 2025.

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

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 April 11, 2025.

What is the cheapest day to fly from San Diego to Seattle?

Use this chart to determine the cheapest time to fly round-trip from San Diego to Seattle. Price data was last updated on March 30, 2025.

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 April 11, 2025.

Rainfall in Seattle by month

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

Temperature in Seattle by month

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

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from San Diego to Seattle, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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.

What airports do I use to fly from San Diego to Seattle?

How popular is this San Diego to Seattle flight route?

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

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

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

What are the cheapest flights from San Diego to Seattle?

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

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

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

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

Traveling to a place near San Diego?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Diego to Seattle

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Top 8 airlines flying from San Diego to Seattle

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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 April 11, 2025.