Book Cheap Sixt Car Hire Deals in Bonfim, Porto, Portugal

Research fuel prices in the area where you'll return the vehicle. Filling up at a local station may be cheaper than paying for fuel through the rental company, especially if they charge higher rates.

Note that some rental companies impose age restrictions or additional fees for drivers under 25. Always verify the age policy when booking.

Prior to booking, check for any current promotional offers or discounts. Many rental agencies provide seasonal deals or early booking discounts.

If you're looking for extra comfort or features, ask about upgrade options at the rental counter. Often, discounted upgrades are available at pickup.

Many rental firms prefer credit cards and may not accept debit cards for payment. If you're using a debit card, confirm the company's policies before making a reservation.

Some rentals have mileage limits, while others provide unlimited mileage. Review these policies carefully to avoid unexpected charges.

Research any toll roads on your travel route and understand the payment options. Some rental companies provide toll transponders for convenience.

To evade additional charges, return the rental car on schedule. Familiarize yourself with the agreed return time to prevent any surprises.