Plan to arrive at SAN at least two hours before your flight to avoid stress from traffic congestion near the airport.
$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 12/21. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
ene. 3 — ene. 101
1 adult, Economy
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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 February, booked 69 days in advance, depart on a Thursday or Friday and return on a Wednesday
Cheap 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 diciembre 4, 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 diciembre 4, 2025.
This Kiwi.com deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1810:52 amSAN - SEA
1 stop27h 02mFrontier
vie. 1/27:48 pmSEA - SAN
1 stop12h 59mFrontier
Deal found 12/1![Frontier logo]()
$132
This Alaska Airlines deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/277:15 amSAN - SEA
Nonstop3h 18mAlaska Airlines
mié. 12/317:55 pmSEA - SAN
Nonstop2h 50mAlaska Airlines
Deal found 12/2![Alaska Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1810:52 amSAN - SEA
1 stop27h 02mFrontier
mié. 12/311:25 pmSEA - SAN
1 stop10h 34mFrontier
Deal found 12/1![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/244:47 pmSAN - SEA
1 stop19h 43mFrontier
vie. 1/27:48 pmSEA - SAN
1 stop12h 59mFrontier
Deal found 12/2![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/244:47 pmSAN - SEA
1 stop19h 43mFrontier
sáb. 1/36:12 pmSEA - SAN
1 stop16h 01mFrontier
Deal found 12/1![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/244:47 pmSAN - SEA
1 stop19h 43mFrontier
mié. 12/311:25 pmSEA - SAN
1 stop10h 34mFrontier
Deal found 12/2![Frontier logo]()
$153
This Delta deal was found by Cheapflights users on 12/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3011:16 amSAN - SEA
Nonstop3h 14mDelta
jue. 1/87:10 amSEA - SAN
Nonstop2h 52mDelta
Deal found 12/4![Delta logo]()
$158
This Alaska Airlines deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/311:28 pmSAN - SEA
1 stop18h 57mAlaska Airlines
sáb. 1/1012:07 pmSEA - SAN
1 stop9h 12mAlaska Airlines
Deal found 12/2![Alaska Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/143:18 pmSAN - SEA
2 stops23h 27mFrontier
vie. 1/27:48 pmSEA - SAN
1 stop12h 59mFrontier
Deal found 12/1![Frontier logo]()
$184
Find 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 diciembre 4, 2025.
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $132 (Kiwi.com) |
One-way from | $89 (CheapOair) |
Popular in | November |
Cheapest in | January |
Average price | $281 |
Good round-trip deal | $234 or less |
Good one-way deal | $163 or less |
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 2,558,603 searches. Data last updated diciembre 4, 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
vie. 2/13
8:26 pm-11:40 pm
Nonstop3h 14m
Seattle/Tacoma Intl
mar. 2/17
9:59 pm-4:47 pm
1 stop18h 48m
$134
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
jue. 1/8
7:00 am-10:15 am
Nonstop3h 15m
Seattle/Tacoma Intl
jue. 1/8
5:59 pm-8:43 pm
Nonstop2h 44m
$139
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
lun. 2/2
7:00 am-10:15 am
Nonstop3h 15m
Seattle/Tacoma Intl
vie. 2/6
9:51 am-12:46 pm
Nonstop2h 55m
$139
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
sáb. 2/14
8:26 pm-11:40 pm
Nonstop3h 14m
Seattle/Tacoma Intl
mar. 2/17
12:00 pm-8:49 am
1 stop20h 49m
$141
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
jue. 1/22
2:20 pm-10:30 pm
1 stop8h 10m
Seattle/Tacoma Intl
lun. 1/26
6:05 am-4:45 pm
2 stops10h 40m
$145
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
lun. 2/2
12:47 pm-8:20 pm
1 stop7h 33m
Seattle/Tacoma Intl
vie. 2/6
10:02 pm-8:33 am
1 stop10h 31m
$147
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
vie. 2/20
6:50 am-10:05 am
Nonstop3h 15m
Seattle/Tacoma Intl
lun. 2/23
3:15 pm-5:50 pm
Nonstop2h 35m
$148
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
mar. 1/6
10:25 am-2:55 pm
1 stop4h 30m
Seattle/Tacoma Intl
sáb. 1/10
12:30 pm-7:15 pm
1 stop6h 45m
$149
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
vie. 2/20
8:04 am-7:12 pm
1 stop11h 08m
Seattle/Tacoma Intl
lun. 2/23
6:59 pm-9:49 pm
Nonstop2h 50m
$154
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
sáb. 1/17
10:40 am-4:50 pm
1 stop6h 10m
Seattle/Tacoma Intl
mar. 1/20
5:15 am-6:35 pm
2 stops13h 20m
$157
Showing 1-10 of 21 results
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 December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on San Diego-Seattle flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on San Diego-Seattle flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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.
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
Prices
Airlines
Delays
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 November 28, 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 58 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, February is the cheapest month in which you can book a flight from San Diego to Seattle (average of $54). Flying from San Diego to Seattle in July is currently the most expensive (average of $134). 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 diciembre 4, 2025.
It’s typically best to fly out from San Diego to Seattle in the afternoon. Doing so could potentially save you 18% on the flight price compared to flying at noon, which is usually more expensive.
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 November 29, 2025.
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. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from San Diego to Seattle delayed?
About 12% of weekly flights between San Diego and Seattle have experienced delays in the past year, with the average delay time being 147 minutes.
What is the most punctual flight time for San Diego to Seattle flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on San Diego to Seattle flights?
Over the last year, Delta have had the lowest number of delays on this route, with just 8% of flights being delayed.
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 diciembre 4, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and Hawaiian Airlines from San Diego to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentMarcie,Nov 2025
PIT - SEA
Food
7.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentMarcie,Nov 2025
PIT - SEA
Food
7.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentMarcie,Nov 2025
PIT - SEA
Food
7.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentMarcie,Nov 2025
PIT - SEA
Food
7.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentMarcie,Nov 2025
PIT - SEA
Food
7.1
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentMarcie,Nov 2025
PIT - SEA
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsTacoma
SeaTac
Lakewood
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for San Diego to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Top 8 airlines flying from San Diego to Seattle
Discover the top 8 airlines that operate flights from San Diego to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated diciembre 4, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$64 | Average$152 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$103 | Average$201 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$137 | Average$255 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$147 | Average$279 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$159 | Average$283 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$166 | Average$304 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$216 | Average$312 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$256 | Average$452 | FlexibilityNo cancel fee | On-time71% |