I've had good luck (at least from LGA) with 1-800-BOOK-A-LIMO (call 1-800-266-5254 or go to http://www.1800bookalimo.com ). Their affiliates seem to have all late model Town Car sedans or limos (note - this is a nationwide service - all the rates are posted at http://www.1800bookalimo.com/rates_usa.html ). The rates are higher than a car service - but this is more of an executive sedan/limo company. (Plus in other cities without the wide range of car services like NYC, this is a great alternative to waiting on the cab line.) From JFK a sedan runs $45, a limo is $70/$80/$90 for 6/8/10 passenger limos. From LGA it's a great deal: $35/$60/$70/$80 (Sedan/6/8/10 pax limo). These rates do not include a 15%-20% tip. I was paying Boston Coach $80 for a ride in their small Volvo sedans from LGA to midtown - now I can save money and have a Town Car - or pay the same thing and ride in a limo.