Cheap flights from Boston to San Diego from CA $108

View CA $108 flight on Sat, Aug. 30, 2025Opens in a new window

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Cheap flights from Boston (BOS) to San Diego (SAN)

Prices were available within the past 7 days and start at CA $108 for one-way flights and CA $323 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Tue, Sep. 16 - Sat, Sep. 27
BOS
Boston
SAN
San Diego
CA $323 Roundtrip, found 5 days ago
CA $323
Roundtrip
found 5 days ago
Select JetBlue Airways flight, departing Tue, Sep. 16 from Boston to San Diego, returning Sat, Sep. 27, priced at CA $323 found 5 days ago
Delta
Wed, Sep. 17 - Sat, Sep. 27
BOS
Boston
SAN
San Diego
CA $323 Roundtrip, found 5 days ago
CA $323
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Sep. 17 from Boston to San Diego, returning Sat, Sep. 27, priced at CA $323 found 5 days ago
Delta
Wed, Sep. 3 - Wed, Sep. 10
BOS
Boston
SAN
San Diego
CA $325 Roundtrip, found 2 days ago
CA $325
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Sep. 3 from Boston to San Diego, returning Wed, Sep. 10, priced at CA $325 found 2 days ago
Alaska Airlines
Wed, Sep. 3 - Wed, Sep. 10
BOS
Boston
SAN
San Diego
CA $326 Roundtrip, found 2 days ago
CA $326
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Sep. 3 from Boston to San Diego, returning Wed, Sep. 10, priced at CA $326 found 2 days ago
American Airlines
Wed, Sep. 3 - Wed, Sep. 10
BOS
Boston
CLD
Carlsbad
CA $352 Roundtrip, found 2 days ago
CA $352
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Sep. 3 from Boston to Carlsbad, returning Wed, Sep. 10, priced at CA $352 found 2 days ago
Spirit Airlines
Sun, Aug. 31 - Tue, Sep. 9
BOS
Boston
SAN
San Diego
CA $367 Roundtrip, found 1 hour ago
CA $367
Roundtrip
found 1 hour ago
Select Spirit Airlines flight, departing Sun, Aug. 31 from Boston to San Diego, returning Tue, Sep. 9, priced at CA $367 found 1 hour ago

Find the cheapest month to fly from Boston (BOS) to San Diego (SAN)

September is typically the cheapest month to fly

From CA $190 - CA $360 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.