Check the Address of the Airport
When buying a cheap (low-cost) ticket, make sure that the airport is not very far from the city so you won’t have to pay 30 euros for a one-way ride. In this case, when traveling in a group, it is more cost-efficient to rent a car at the airport (for example, at Sixt, the German car rental service). You will be able to use the car the whole day for the same price.