To find the number of passengers that Los Angeles had, we start with the number of passengers Atlanta had in 2011 and subtract the number of passengers by which Los Angeles had fewer.
Atlanta had approximately 92.365 million passengers.
Los Angeles had 30.517 million fewer passengers:
\[ \text{Passengers in Los Angeles} = 92.365 \text{ million} - 30.517 \text{ million} \] \[ \text{Passengers in Los Angeles} = 61.848 \text{ million} \]
So, Los Angeles had approximately 61.848 million passengers.