Seattle to San Diego SEA → SAN
Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN)
The cheapest return found recently is $331 with Alaska Airlines, 22 Nov – 28 Nov, found today.
Return
The cheapest return fare on each of 7 departure dates is usually $290 to $342.
Cheapest return found recently
$331
22 Nov – 28 Nov · Alaska Airlines
Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN)
Leaves 6:00 a.m. · Return leaves 6:15 a.m. · 6 h 2 min of travel, both ways together
out nonstop, back nonstop
found today
Cheapest nonstop return
$331
22 Nov – 28 Nov · Alaska Airlines
Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN)
Leaves 6:00 a.m. · Return leaves 6:15 a.m. · 6 h 2 min of travel, both ways together
out nonstop, back nonstop
found today
Found recently, and the cheapest we hold
$331 22 Nov – 28 Novfound todaySee prices for these dates
$218 21 Dec – 25 Decfound 5 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $126 to $197.
At $331, the cheapest return found recently is above that range.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 7 departure dates from 20 Oct to 10 Jun 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 6-night return fares leaving within 3 days of 22 Nov to compare.
Every date we hold
7 fares on 7 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Oct – 22 Oct | $361 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 25 Oct – 29 Oct | $343 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 30 Oct – 1 Nov | $249 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN) | out nonstop, back 1 stop | found 4 days ago | See prices for these dates |
| 21 Nov – 28 Nov | $337 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN) | out 1 stop, back nonstop | found today | See prices for these dates |
| 22 Nov – 28 Nov | $331 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN) | out nonstop, back nonstop | found today | See prices for these dates |
| 21 Dec – 25 Dec | $218 | Southwest Airlines | Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN) | out 1 stop, back nonstop | found 5 days ago | See prices for these dates |
| 10 Jun 2027 – 17 Jun 2027 | $341 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → San Diego International Airport (SAN) | out nonstop, back nonstop | found today | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $218.
Airlines on the cheapest dates: Alaska Airlines, Frontier Airlines, Southwest Airlines.
Premium cabin fares from Seattle to San Diego
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 22 Nov – 28 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Seattle to San Diego?
Return
Fares 90 to 179 days before departure were typically 54% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $340 | $340 | +118% | 11 |
| 7–13 days | $394 | $249 | +153% | 11 |
| 14–29 days | $188 | $165 | +21% | 21 |
| 30–59 days | $189 | $181 | +21% | 14 |
| 90–179 days | $156 | $126 | Cheapest seen | 13 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Everett → San Diego
34 km from Seattle
$344
$13 more than flying from Seattle
10 Jun 2027 – 17 Jun 2027 · PAE → SAN · out 1 stop, back nonstop
found today
Bellingham → San Diego
128 km from Seattle
$353
$22 more than flying from Seattle
12 Dec – 22 Dec · BLI → SAN · out 1 stop, back 1 stop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 22 Nov – 28 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work