There is no train connection to the airport of Tunis.
Car and bus
The airport is located 7 kilometers to the northeast of Tunis. Directions to the airport are indicated as early as in the city center, travel time is 15-30 minutes, depending on the traffic.
SNT bus line 35 departs every 30 minutes to the center of Tunis, a ticket costs less than 1 dinar. The more luxurious TUT buses are a little more expensive, a little over a dinar, and depart every 15 minutes.
In the Arrivals Hall, there are desks for car rental companies: Avis, Budget, Hertz and Sixt. There are also many local companies, but make sure that all taxes are included in the rental price and that the car is in good shape. You can also book a rental car in advance at EasyTerra, which offers a comparison of several providers.
At the taxi stand, there are taxis with meters, make sure the driver turns the meter on! A ride to the city should cost 5.00 dinars - according to the meter, but taxi drivers often try to get more. There is an extra charge for baggage, and after 21:00 there is a 50% surcharge. Do not respond to 'deals' from taxi drivers in the Arrivals Hall!
In front of the terminal building, there is a parking area with 2,500 spaces, the rate is 0.65 dinar for the first 12 hours and after that 3.00 dinars per day.