It is a 24hr drive from Dallas to los angeles. Several factors goes into the total cost. Are you going to fly or drive? If you fly what kind of deal are you going to get and how are you going to get to and from the airport. Does the airlines you choose charge for luggage or a soda. If you drive gas prices range drastically. If you drive or fly are you going to pack snacks to make food prices cheaper? Plan around $400-$500.
free if you walk and beg for food