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 $320 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, Sep. 3 - Tue, Sep. 16
BOS
Boston
SAN
San Diego
CA $320 Roundtrip, found 6 days ago
CA $320
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Sep. 3 from Boston to San Diego, returning Tue, Sep. 16, priced at CA $320 found 6 days ago
Alaska Airlines
Tue, Aug. 26 - Sat, Sep. 6
BOS
Boston
SAN
San Diego
CA $322 Roundtrip, found 6 days ago
CA $322
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Aug. 26 from Boston to San Diego, returning Sat, Sep. 6, priced at CA $322 found 6 days ago
JetBlue Airways
Tue, Sep. 16 - Sat, Sep. 27
BOS
Boston
SAN
San Diego
CA $323 Roundtrip, found 3 days ago
CA $323
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Tue, Sep. 16 from Boston to San Diego, returning Sat, Sep. 27, priced at CA $323 found 3 days ago
Delta
Wed, Sep. 17 - Sat, Sep. 27
BOS
Boston
SAN
San Diego
CA $323 Roundtrip, found 3 days ago
CA $323
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Sep. 17 from Boston to San Diego, returning Sat, Sep. 27, priced at CA $323 found 3 days ago
Hawaiian Airlines
Sat, Sep. 6 - Tue, Sep. 23
BOS
Boston
SAN
San Diego
CA $324 Roundtrip, found 6 days ago
CA $324
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Sat, Sep. 6 from Boston to San Diego, returning Tue, Sep. 23, priced at CA $324 found 6 days ago
American Airlines
Mon, Aug. 18 - Sun, Aug. 24
BOS
Boston
SAN
San Diego
CA $339 Roundtrip, found 6 days ago
CA $339
Roundtrip
found 6 days ago
Select American Airlines flight, departing Mon, Aug. 18 from Boston to San Diego, returning Sun, Aug. 24, priced at CA $339 found 6 days 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.