The 7-4 vote Thursday by the California Coastal Commission came with conditions including setting up a program to track bird strikes.
The zip line, located near Venice Beach's famous skateboard park, would be operated for three months. Rides would cost $20. The Los Angeles Department of Recreation and Parks wants part of the revenue to go toward park maintenance.
Some residents worry that the seaside attraction will increase traffic in the neighborhood and that the launch and landing towers will block the ocean view.
After the pilot phase, the city would have to come before the coastal panel again to make the case for a permanent zip line.