Excellent for fares under $40 round trip...
If your fare is higher, you can use
LE74Z, which is a round trip discount of 15% from Visa, when you use a Visa card:
Receive a 15% discount on SuperShuttle airport transportation from home, office or hotel when you pay with your Visa® card.
To redeem this offer, click the link below or call 1-800-258-3826 and mention code LE74Z. SuperShuttle discount valid on round trip fares for the first rider fare only.
Valid: 06/30/2011 to 10/31/2011
Valid only on round trip fares.
Offer subject to change, and is based on individual merchant’s terms and conditions.
Void where prohibited or restricted by law.
Offer valid only when you pay with your Visa card.
Any taxes are the sole responsibility of the purchaser.
Note: The driver is a franchisee - if you use a discount, it comes directly out of the fare submitted to him by SuperShuttle. I have occasionally been questioned - not in an especially friendly way - about where I found a discount. YMMV but I'm willing to tolerate the occasional attitude.
Helpful tip: I have received a substantially lower fare by searching for a hotel name rather than the hotel address. Apparently some hotels are priced lower than the usual distance based fare.