San
Diego International Airport, airport code SAN, is located
three miles from the city's downtown and is the busiest
single-runway commercial service airport in the nation.
Ground
Transportation
Though San
Diego's Metro
system is extensive, with three light-rail
lines covering 51 miles and 53 stations, and 100 bus lines,
most reviews suggest renting
a car (or something
else) if you and your companions want to
explore San Diego County most enjoyably.