Flightcar, which facilitates peer-to-peer airport rentals at three U.S. airports, today announced a $13.5 million fundraising round led by GGV Capital.

The funding builds on Flightcar’s earlier $5.5 million round announced in April 2013 that included a number of high-profile investors including General Catalyst, Softbank Capital, and Airbnb founder and CEO Brian Chesky.

Flightcar shuttles flyers to and from airports using third-party car services. Customers renting their car can leave it in the lot for free while those renting can access discounted rentals.

Flightcar currently operates at San Francisco International Airport, Boston Logan, and Los Angeles International Airport, but its growth has been controversial.

The San Francisco city attorney’s office filed a lawsuit against the airport car rental and parking service in June 2013 on behalf of San Francisco Airport for continued violation of the airports’ cease and desist letters.

As recently as last month, a spokesperson at Los Angeles International Airport would not comment on Flightcar’s operations as the startup is not permitted to operate at the airport.

A spokesperson from Boston Logan Airport said that Massport does not have contractual agreement with Flightcar.

Photo Credit: Avi Zinn, wife, Cory Isaacson and daughter Leah Zinn, 4-months-old, pick up their car at FlightCar in Millbrae, California, August 7, 2013. Gary Reyes / Bay Area News Group/MCTBay Area News Group/MCT