Do you need to wait for bags? If so, I personally would allow 2.5 - 3.00 hours.
Be sure to rent from an 'on airport' rental car company.
BTW SuperShuttle makes the trip about every 30 minutes. Fare is about $19.00 for the 1st psgr and $7.00 for any additional psgr. Travel time with them is about an hour... with the airport stops, etc. Details at 800-258-3826 or
www.supershuttle.com
[This message has been edited by tvl4free (edited 05-10-2001).]