I-VII 07:00 – 00:00
Guerin is one of the strongest picks at Porto Airport: a 100% Portuguese company in the Salvador Caetano group and the official Enterprise Rent-A-Car franchisee in Portugal, it scores 8/10 on DiscoverCars and has won DiscoverCars' Excellent Car Rental Service Award at Porto for multiple years. You book Guerin but get Enterprise-standard service and network. Pickup is via a desk at the terminal exit and a short shuttle (call the internal phone for instructions). The main thing to watch: as with most majors, do not let the desk sell you full insurance you already bought through the booking site.
Average daily rates at Porto Airport (OPO) by season
Economy/compact, booked ~4 weeks ahead, EUR
| Season | Economy | Compact | Automatic |
|---|---|---|---|
| Low (Nov–Feb) | €8–18 | €12–24 | €22–38 |
| Shoulder (Mar–May, Oct) | €16–30 | €22–40 | €35–60 |
| Peak (Jun–Sep) | €30–50 | €40–65 | €55–95 |
Estimated rental cost by trip length
from €10/day
Illustrative — daily rate × days at the lowest 2026 starting price; real prices vary by season & demand.
Porto Rental Budget Calculator
Daily rate is prefilled with the lowest realistic low-season economy rate at Porto Airport; change it for your dates.
Once you exit arrivals, a Guerin-branded desk on the right has an internal phone for shuttle instructions to the nearby office, where the contract and car check happen. It is a quick, well-signed process; the onsite online registration is a little clunky but staff guide you through it.
DiscoverCars 8/10 and multiple Excellent Service Awards at Porto. Enterprise-standard service, newer fleet, dependable. Decline duplicate insurance at the desk if you already have cover.
DiscoverCars 8/10 with an in-terminal counter (level 0 arrivals). Convenient and modern, but among the pricier names and with some insurance-clarity complaints.
Lower headline prices but bigger deposits and refund delays. Fine for confident, well-prepared renters; Guerin is the calmer choice for similar value once cover is added.
DiscoverCars verified scores at Porto (2026)
/10, verified-rental ratings
Guerin includes CDW with an excess blocked on your card. If you already bought full cover through the booking platform, keep the documents and decline the desk’s offer to sell it again – a common point of friction. Otherwise, stand-alone excess insurance (€4–7/day) is cheaper than the counter waiver.
The ex-SCUT motorways lost their tolls in stages (A24 in January 2025, A25 in January 2026) and the northern A28 sections towards Viana do Castelo are free, but the A28 Porto–Póvoa de Varzim stretch is still tolled. The A1 (south to Aveiro/Coimbra/Lisbon), A3 (north to Braga and Spain) and parts of the A4 also remain tolled, mostly electronic. With a rental, take the company’s Via Verde transponder (small daily fee) or expect tolls plus a €25–50 admin fee billed afterwards. Fuel in August 2026 is about €1.99/L petrol and ~€2.03/L diesel; supermarket pumps cheapest. Return the car full.
Guerin often matches budget brands once their deposits and forced cover are added.
Avoid paying twice for cover at the desk.
A car opens up the Douro Valley (about an hour east), the A28 coast north to Viana and the beaches (toll-free beyond Póvoa), and Braga/Guimarães. Porto’s historic centre itself is walkable, so many visitors collect the car when they leave the city.
Related Porto guides
Not exactly – Guerin is a 100% Portuguese company in the Salvador Caetano group and the official Enterprise Rent-A-Car franchisee in Portugal since 2012, so you book Guerin but get Enterprise-standard service and the Enterprise/Alamo/National network.
A Guerin desk is on the right as you exit arrivals, with an internal phone for shuttle instructions to the nearby office where you collect the car. It is quick and well signed.
Yes – DiscoverCars 8/10 and multiple Excellent Car Rental Service Awards at Porto, with a newer fleet and dependable service.
If you already bought full insurance through the booking site, decline the desk’s offer to sell it again – that duplicate-insurance push is the main complaint. The onsite registration is slightly clunky but staffed.
The northern A28 sections are toll-free, but the A28 Porto–Póvoa stretch is still tolled, as are the A1 (south) and A3 (north to Braga/Spain), mostly electronic, with a €25–50 admin fee on rentals. Take the Via Verde device if offered.
Yes, a credit card in the main driver’s name for the security deposit, which is blocked (not charged) at pickup.
Disclosure: Auto Jardim participates in the DiscoverCars affiliate program. Reviews are based on Trustpilot, Google Maps, traveller forums and direct experience. We only recommend companies we would use ourselves.
Last updated: August 2026. Prices and policies change – always verify directly with the rental company.
