Cheapest one-way flights from San Francisco to San Diego in April from $28

AirHint found the following cheapest one-way flights from San Francisco (SFO) to San Diego (SAN) in April 2026 (see full year).

One-Way flights

16 Apr Frontier Airlines direct
01 Apr Alaska Airlines direct
22 Apr Alaska Airlines direct
11 Apr Alaska Airlines direct
15 Apr Alaska Airlines direct
21 Apr Hawaiian Airlines direct
18 Apr Hawaiian Airlines direct
20 Apr Frontier Airlines direct
07 Apr Southwest Airlines direct
08 Apr Southwest Airlines direct

Also check the deals for return flights from San Francisco to San Diego in April.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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