car hire is quite pricy. buses untill 28th september are pritty good, £150 single per person, airport to town, and they run every 30 minutes or so.
mybus - Jersey Public Transportation taxi into town will cost around £20 from the airport. my choice ... go to poole jump on the ferry as foot passengers, brings you straight in to the harbour in town, and that is with condor ferries. by air I would only use Flybe flying Gatwick and other airports.
for car hire contact Falles car hire. Good luck.