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