Home / 'Hoods / South San Francisco / SFO / Airport SFO / Airport South San Francisco · open late in this neighborhood EATING —— 1 24HR 01. Denny's (South SF Airport) 24hr-diner · SFO / Airport 24-hour Denny's near SFO. Classic post-flight or post-3am breakfast diner move. ⏱ Open 4a+ / overnight $ 3.9★ (3.4k)