Cheapest return flights from San Francisco to San Diego in May from 49€

AirHint found the following cheapest return flights from San Francisco (SFO) to San Diego (SAN) in May 2026 (see full year).

Return flights

16 May - 19 May Frontier Airlines direct
12 May - 19 May Frontier Airlines direct
04 May - 06 May Frontier Airlines direct
09 May - 11 May Frontier Airlines direct
04 May - 11 May Frontier Airlines direct
05 May - 11 May Frontier Airlines direct
08 May - 11 May Frontier Airlines direct
07 May - 09 May Frontier Airlines direct
07 May - 11 May Frontier Airlines direct
29 May - 02 Jun Frontier Airlines direct
20 May - 23 May Frontier Airlines direct
20 May - 20 Jun Frontier Airlines direct
04 May - 12 Jun Frontier Airlines direct
29 May - 01 Jun Frontier Airlines direct
28 May - 01 Jun Frontier Airlines direct

Also check the deals for one-way flights from San Francisco to San Diego in May.

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