Los Angeles and New Orleans are about 1,669 miles apart by road. Split the difference and you arrive near El Paso, the city closest to the halfway point between them. That puts roughly 14 hr 40 min of driving on the Los Angeles side and 20 hr 34 min on the New Orleans side — the fairest single meeting point among the cities near the middle.
Over this distance most people will fly rather than drive the whole way. El Paso still makes a fair, central place for Los Angeles and New Orleans to converge, splitting the travel instead of asking one side to cross the country.
If El Paso doesn't have what you're after, Albuquerque and San Antonio are also close to the midpoint and worth a look — each keeps the drive reasonably balanced between Los Angeles and New Orleans.
City descriptions adapted from Wikipedia (CC BY-SA); photos via Wikimedia Commons, credited above.