Cheap flights from San Francisco to San Diego
Cheapest current fares: $24 in September 2026, 719 km direct flight in ~51m.
Cheapest month-by-month fares
Lowest available fare per calendar month from San Francisco (SFO) to San Diego (SAN). Refreshed daily.
San Francisco (SFO) → San Diego (SAN)
- September 2026 $24
- August 2026 $31
- October 2026 $34
Frequently asked questions
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What is the cheapest month to fly from San Francisco to San Diego?
Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from San Francisco (SFO) to San Diego (SAN), with fares starting from $24.
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What is the lowest current fare from SFO to SAN?
The lowest currently-listed fare from San Francisco (SFO) to San Diego (SAN) is $24 on 2026-09-29.
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How long is the flight from San Francisco to San Diego?
Direct flights from SFO to SAN cover approximately 719 km (447 miles), with an estimated flight time of 51m. Operating airlines: AS, F9, UA, WN.
Related guides for this route
Sibling pages — full route detail, airport overviews, visa context, per-airline routes.