A fixed fare means the price is agreed in writing before you fly. It does not move with traffic, with a longer route or with how long the airport takes.
Tolls and airport parking are already inside the number. If you travel with child seats, they are free on request, and golf bags fit.
To get a fare, send your flight number, date and destination. The answer arrives by email, usually within the hour, and no card is needed to hold the car.