Cheap flights from Palo Alto to Carlsbad from CA $40

View CA $40 flight on Sun, Aug. 10, 2025Opens in a new window

Popular airlines from Palo Alto to Carlsbad

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Cheap flights from Palo Alto (SJC) to Carlsbad (SAN)

Prices were available within the past 7 days and start at CA $40 for one-way flights and CA $80 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Thu., Aug. 7 - Mon., Aug. 11
OAK
Oakland
SAN
San Diego
CA $80 Roundtrip, found 2 days ago
CA $80
Roundtrip
found 2 days ago
Select Spirit Airlines flight, departing Thu., Aug. 7 from Oakland to San Diego, returning Mon., Aug. 11, priced at CA $80 found 2 days ago
Spirit Airlines
Thu., Jul. 10 - Mon., Jul. 14
OAK
Oakland
SAN
San Diego
CA $80 Roundtrip, found 6 days ago
CA $80
Roundtrip
found 6 days ago
Select Spirit Airlines flight, departing Thu., Jul. 10 from Oakland to San Diego, returning Mon., Jul. 14, priced at CA $80 found 6 days ago
Alaska Airlines
Tue., Jul. 22 - Sun., Aug. 3
SFO
San Francisco
SAN
San Diego
CA $104 Roundtrip, found 21 hours ago
CA $104
Roundtrip
found 21 hours ago
Select Alaska Airlines flight, departing Tue., Jul. 22 from San Francisco to San Diego, returning Sun., Aug. 3, priced at CA $104 found 21 hours ago
Hawaiian Airlines
Sun., Aug. 3 - Tue., Aug. 19
SFO
San Francisco
SAN
San Diego
CA $118 Roundtrip, found 22 hours ago
CA $118
Roundtrip
found 22 hours ago
Select Hawaiian Airlines flight, departing Sun., Aug. 3 from San Francisco to San Diego, returning Tue., Aug. 19, priced at CA $118 found 22 hours ago
Frontier Airlines
Thu., Jul. 10 - Fri., Jul. 11
SFO
San Francisco
SAN
San Diego
CA $147 Roundtrip, found 7 hours ago
CA $147
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu., Jul. 10 from San Francisco to San Diego, returning Fri., Jul. 11, priced at CA $147 found 7 hours ago
United
Wed., Jul. 23 - Wed., Jul. 30
SFO
San Francisco
SAN
San Diego
CA $160 Roundtrip, found 21 hours ago
CA $160
Roundtrip
found 21 hours ago
Select United flight, departing Wed., Jul. 23 from San Francisco to San Diego, returning Wed., Jul. 30, priced at CA $160 found 21 hours ago

Find the cheapest month to fly from San Francisco (SFO) to San Diego (SAN)

September is typically the cheapest month to fly

From CA $65 - CA $132 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.