Plan to arrive at SAN at least two hours before your flight to avoid stress from traffic congestion near the airport.
$90+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SEA
Nov 19 — Nov 261
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 58 days in advance, depart on a Thursday or Friday 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 October 20, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $155 (Kiwi.com) |
One-way from | $90 (CheapOair) |
Popular in | July |
Cheapest in | January |
Average price | $221 |
Good round-trip deal | $265 or less |
Good one-way deal | $157 or less |
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 October 20, 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 October 20, 2025.
This Kiwi.com deal was found by Cheapflights users on 10/18. 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.
Thu 10/3010:14 amSAN - SEA
1 stop23h 04mFrontier
Fri 10/319:22 pmSEA - SAN
1 stop24h 02mFrontier
Deal found 10/18![Frontier logo]()
$155
This Frontier deal was found by Cheapflights users on 10/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:38 pmSAN - SEA
1 stop11h 40mFrontier
Mon 11/172:22 pmSEA - SAN
1 stop9h 28mFrontier
Deal found 10/20![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Sat 11/88:00 amSAN - SEA
1 stop24h 18mFrontier
Mon 11/1012:58 pmSEA - SAN
2 stops23h 09mFrontier
Deal found 10/19![Frontier logo]()
$157
This Cheapflightsfares deal was found by Cheapflights users on 10/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1411:37 amSAN - SEA
Nonstop3h 13mAlaska Airlines
Sun 11/167:15 amSEA - SAN
Nonstop2h 57mAlaska Airlines
Deal found 10/20![Alaska Airlines logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Tue 12/231:06 pmSAN - SEA
1 stop24h 45mFrontier
Sun 12/286:23 pmSEA - SAN
1 stop18h 15mFrontier
Deal found 10/19![Frontier logo]()
$159
This eDestinos deal was found by Cheapflights users on 10/19. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:25 amSAN - SEA
1 stop9h 14mMultiple Airlines
Wed 12/107:10 amSEA - SAN
1 stop26h 52mMultiple Airlines
Deal found 10/19![Multiple Airlines logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 10/17. 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.
Sat 11/810:00 pmSAN - SEA
2 stops36h 55mFrontier
Mon 11/172:22 pmSEA - SAN
1 stop9h 28mFrontier
Deal found 10/17![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 10/18. 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.
Thu 10/303:59 pmSAN - SEA
2 stops17h 19mFrontier
Sat 11/88:22 pmSEA - SAN
1 stop11h 25mFrontier
Deal found 10/18![Frontier logo]()
$163
This eDestinos deal was found by Cheapflights users on 10/18. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/216:41 amSAN - SEA
1 stop29h 26mFrontier
Fri 10/246:39 pmSEA - SAN
1 stop26h 12mFrontier
Deal found 10/18![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 10/18. 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.
Wed 11/58:00 amSAN - SEA
2 stops34h 22mFrontier
Sun 11/912:58 pmSEA - SAN
1 stop6h 55mFrontier
Deal found 10/18![Frontier logo]()
$166
This CheapOair deal was found by Cheapflights users on 10/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/236:41 amSAN - SEA
1 stop29h 26mFrontier
Sun 10/268:43 pmSEA - SAN
1 stop13h 14mFrontier
Deal found 10/20![Frontier logo]()
$168
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 October 20, 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
Mon 11/17
8:59 pm-7:15 am
1 stop10h 16m
Seattle/Tacoma Intl
Tue 11/18
10:00 am-12:56 pm
Nonstop2h 56m
$167
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Tue 11/11
6:15 am-9:35 am
Nonstop3h 20m
Seattle/Tacoma Intl
Wed 11/19
7:10 am-10:06 am
Nonstop2h 56m
$177
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Sun 11/23
9:17 pm-8:13 am
1 stop10h 56m
Seattle/Tacoma Intl
Mon 12/15
6:59 pm-6:30 am
1 stop11h 31m
$182
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Sat 12/6
7:10 am-3:39 pm
1 stop8h 29m
Seattle/Tacoma Intl
Wed 12/10
3:48 pm-11:30 pm
1 stop7h 42m
$183
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Sat 11/15
6:15 am-9:35 am
Nonstop3h 20m
Seattle/Tacoma Intl
Mon 11/17
9:50 am-12:46 pm
Nonstop2h 56m
$187
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Tue 12/9
1:41 pm-4:53 pm
Nonstop3h 12m
Seattle/Tacoma Intl
Sat 1/3
7:15 am-10:11 am
Nonstop2h 56m
$187
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Wed 12/17
2:15 pm-5:27 pm
Nonstop3h 12m
Seattle/Tacoma Intl
Sun 1/18
4:30 pm-7:16 pm
Nonstop2h 46m
$187
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Thu 11/27
1:41 pm-4:54 pm
Nonstop3h 13m
Seattle/Tacoma Intl
Wed 12/10
3:25 pm-6:13 pm
Nonstop2h 48m
$187
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Sun 11/9
6:15 am-9:35 am
Nonstop3h 20m
Seattle/Tacoma Intl
Sat 11/15
11:25 am-2:14 pm
Nonstop2h 49m
$187
San DiegoSeattle
SAN - SEA
SANSEA
San Diego
Thu 11/13
3:43 pm-6:53 pm
Nonstop3h 10m
Seattle/Tacoma Intl
Mon 11/17
4:41 pm-9:15 pm
1 stop4h 34m
$191
Showing 1-10 of 20 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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| 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*3 stars |
- 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.
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 October 17, 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 October 20, 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 October 12, 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 143 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, Aeromexico have had the lowest number of delays on this route, with no flights being classified as delayed.
The best insider tips for San Diego to Seattle flights
Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your San Diego to Seattle trip
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 October 20, 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.
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Food
7.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Aug 2025
MFR - SEA
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Food
7.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Aug 2025
MFR - SEA
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Food
7.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Aug 2025
MFR - SEA
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Food
7.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Aug 2025
MFR - SEA
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Food
7.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Aug 2025
MFR - SEA
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
8.0
Boarding
8.1
Food
7.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Aug 2025
MFR - 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 locationsSeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
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 October 20, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$66 | Average$163 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$100 | Average$167 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$113 | Average$387 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$137 | Average$254 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$148 | Average$277 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$159 | Average$283 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$166 | Average$296 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$216 | Average$341 | FlexibilityNo cancel fee | On-time69% |