Avis is currently running a $19.99 special in which you can reserve a car for 4 hours to be driven from an airport to downtown and vice versa.
HT: Avis.com
See T&C's below:
Offer valid for one-way rentals only; vehicle must be picked up at a participating location and dropped off at a different participating location 4-hrs later at maximum.
Traveling from an Airport to Downtown: Pickup must occur on a Thursday or Friday.
Traveling from Downtown to an Airport: Pickup must occur on a Sunday or Monday.
Vehicle must be reserved 48 hours in advance of pickup.
Offer valid on compact (group B), Midsize (group C), Full Size (group E), Intermediate SUV (group F) and Minivan (Group V) vehicles only.
Offers may not be available during holiday and other blackout periods; rate surcharges during peak periods may apply.
Offer subject to vehicle availability at the time of reservation and may not be available on some rates at some times.
Renter must meet Avis age, driver and credit requirements. Minimum age may vary by location.
An additional daily surcharge may apply for renters under 25 years old.
Rates are non-discountable; they may not be combined with any AWD number, coupon, promotion or offer.
Taxes, concession recovery fees, vehicle license recovery fee, customer facility charges may apply and are extra.
Rates are based on U.S. currency.
Rate includes Free Loss Damage Waiver. Standard Qualifications apply.