Car rental from €4/day — booked ahead, not at the desk, 500+ companies compared

Two airport taxis in Southern Europe often add up to €50-80. A rental car booked ahead for the same trip can be €20-40 total — and the counter price at the airport, bought with no alternative, is the worst price there is.

• Real examples we compared: Catania from €4/day (vs €35-50 for a taxi), Faro from €5/day (vs €25-40), Malaga from €6/day (vs €25-35), Lisbon from €8/day (vs €20-30).
• Compare the total with insurance included, not the headline rate: the counter upsell is where the cheap rate disappears.
• Off-airport pickups are often much cheaper, and worth it when a shuttle is included.