Update: CarTrawler today signed a deal to integrate its search and booking system also with Gulf Air.
Dublin-based CarTrawler is working with Spain's fast growing budget airline Vueling to provide car search facilities on and offline.
Vueling is hoping to spread its wings further in 2011 and has signed CarTrawler to run the car rental white label on its main website, call centre and at various venue kiosks.
The airline calls itself a "next generation" low cost carrier and has spent the past six years slowly establishing itself in its home country, with six bases (including its headquarters in Barcelona) - a base in Toulouse will open next year.
Vueling claims it is second only to Iberia in Spain in terms of size.
Visitors to the airline site or kiosks will get access to around 550 car rental providers in 25,000 destinations around the world, CarTrawler says.
The deal was signed in September 2010.