San Diego to Seattle flights
The cheapest round trip we found from San Diego to Seattle is $122 (Dec 12 – 15, Nonstop), 70% below the usual $410.
SAN to SEA · Round trip · Economy · Prices per person in USD · Price found (1 day ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $467 |
| December 2026 | $122 (cheapest month) |
| January 2027 | No fares found yet |
| February 2027 | No fares found yet |
| March 2027 | No fares found yet |
| April 2027 | $410 |
Cheapest dates in the next 4 months
Round trip, per person-
Dec 12 – 15 3 nights · leave Sat$122 −70% vs usual$122 −70% vs usual Book
Southwest Airlines Nonstop · 3h 05m -
Nov 25 – 27 2 nights · leave Wed$467 +14% vs usual$467 +14% vs usual Book
Alaska Airlines 1 stop · 3h 09m -
Nov 22 – 25 3 nights · leave Sun$469 +14% vs usual$469 +14% vs usual Book
Frontier Airlines 1 stop · 4h 33m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in Seattle
Tickets and tours on KlookTo see tours and tickets here, turn on partner content in .
Partner widget: we may earn a commission if you book, at no extra cost to you.
Airport transfer to Seattle
Fixed prices from SEA on KiwitaxiTo see transfer prices here, turn on partner content in .
Partner widget: we may earn a commission if you book, at no extra cost to you.
Plan the rest of your trip
Seattle · Dec 12 – 15Partner links: we may earn a commission if you book, at no extra cost to you.
More from San Diego
-
-
-
-
-
-
-
-
Flights to Seattle from other cities
-
-
-
-
-
- Ontario $176 −32%
San Diego to Seattle: questions
How much does a flight from San Diego to Seattle cost?
The cheapest round trip we have found right now is $122, leaving December 12 and returning December 15. The usual price on this route is about $410, so this fare is 70% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from San Diego to Seattle?
December 2026, with round trips from $122. The most expensive month in our data is November (from $467). Based on the 3 months ahead we have prices for.
Which airports do San Diego to Seattle flights use?
San Diego airports include San Diego International (SAN) and McClellan-Palomar (CLD). Seattle airports include Seattle-Tacoma International (SEA) and Boeing Field International (BFI). The prices on this page cover every airport in both cities (SAN and SEA are the city codes).
About this route
We track round-trip economy fares from San Diego (United States) to Seattle (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $122, departing December 12 and returning December 15 on a nonstop flight, about 70% below the usual $410. The cheapest month to fly in our data is December, from $122. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.