San Francisco International Airport (SFO) is about 14 miles south of downtown San Francisco and the Financial District. You can easily take a cab from Hotel Nikko for about $45-50 or hop on the nearby BART (Bay Area Rapid Transit) at Powell Street, 2 blocks away, for $8.95 for an adult ticket. You can also take the Super Shuttle to SFO for about $32 to $34 one way.