Cheap flights from Seattle to San Diego from CA $122

View CA $122 flight on Tue, Sep. 30, 2025Opens in a new window

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Cheap flights from Seattle (SEA) to San Diego (SAN)

Prices were available within the past 7 days and start at CA $122 for one-way flights and CA $187 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Nov. 12 - Wed, Dec. 3
SEA
Seattle
SAN
San Diego
CA $187 Roundtrip, found 6 days ago
CA $187
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Nov. 12 from Seattle to San Diego, returning Wed, Dec. 3, priced at CA $187 found 6 days ago
Alaska Airlines
Sat, Sep. 27 - Tue, Sep. 30
PAE
Seattle
SAN
San Diego
CA $213 Roundtrip, found 2 days ago
CA $213
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Sep. 27 from Seattle to San Diego, returning Tue, Sep. 30, priced at CA $213 found 2 days ago
Hawaiian Airlines
Sat, Sep. 27 - Wed, Oct. 1
PAE
Seattle
SAN
San Diego
CA $214 Roundtrip, found 2 days ago
CA $214
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Sat, Sep. 27 from Seattle to San Diego, returning Wed, Oct. 1, priced at CA $214 found 2 days ago
Delta
Wed, Sep. 3 - Sat, Sep. 6
SEA
Seattle
SAN
San Diego
CA $215 Roundtrip, found 6 days ago
CA $215
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Sep. 3 from Seattle to San Diego, returning Sat, Sep. 6, priced at CA $215 found 6 days ago
American Airlines
Sat, Nov. 8 - Sat, Nov. 15
SEA
Seattle
CLD
Carlsbad
CA $243 Roundtrip, found 8 hours ago
CA $243
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Sat, Nov. 8 from Seattle to Carlsbad, returning Sat, Nov. 15, priced at CA $243 found 8 hours ago
Frontier Airlines
Sat, Aug. 23 - Fri, Aug. 29
SEA
Seattle
SAN
San Diego
CA $299 Roundtrip, found 11 hours ago
CA $299
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Sat, Aug. 23 from Seattle to San Diego, returning Fri, Aug. 29, priced at CA $299 found 11 hours ago

Find the cheapest month to fly from Seattle (SEA) to San Diego (SAN)

November is typically the cheapest month to fly

From CA $111 - CA $374 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.