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Firefly is Hertz's budget brand at Porto Airport: off-airport, cheap headline rates, and a low-frills product aimed at price-first travellers. Reviews are mixed – some praise the car quality and price, but the recurring complaints are a “credit/debit card mess”, pressure to buy full coverage, and bills ending up well above the original quote (one renter “paid 3 times” the expected amount). As with all budget brands, the headline is only part of the cost: pre-book excess cover, bring a credit card, and document the car.
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 |
Firefly is operated off-airport via the Hertz group; you collect away from the terminal after a short transfer. Allow extra time and check the fuel and insurance terms carefully.
Cheap rates and reasonable cars, but complaints focus on card/coverage requirements and final bills far above the quote. Best for confident, well-prepared renters.
A 100% Portuguese company and the official Enterprise Rent-A-Car franchisee, in-terminal at OPO with DiscoverCars 8/10 – the dependable, no-drama alternative to a budget brand.
Firefly’s parent, in-terminal at OPO with a newer fleet – pricier but more straightforward if you would rather avoid budget-brand friction.
Porto options – what to expect (2026)
DiscoverCars verified scores /10
The most common Firefly friction is card and coverage: a credit card in the lead driver’s name is effectively required, and without full coverage you face a large hold. Pre-book stand-alone excess insurance (€4–7/day) for cheaper protection, but expect the deposit regardless and read exactly what is and is not covered before signing.
Porto's toll picture changed in 2025: the A28 coastal motorway north to Viana do Castelo is now toll-free, along with the A24/A25. The A1 (south to Aveiro, Coimbra and Lisbon), A3 (north to Braga and the Spanish border) and parts of the A4 remain tolled, mostly via electronic gantries. With a rental you either take the company's Via Verde transponder (small daily fee) or the tolls plus an admin fee (typically €25–50) are billed to your card afterwards. Fuel in May 2026 is about €1.95/L petrol and ~€2.00/L diesel; supermarket pumps are cheapest. Always return the car full.
Confirm what the price includes so the final bill matches the quote.
Avoids the card “mess” and protects against damage and fuel disputes.
What a week at Porto really costs
Economy car, shoulder season
| Cost item | Mainstream (prepaid) | Typical Firefly |
|---|---|---|
| Base (7 days) | €180 | €84 headline |
| Insurance | €42 excess | €110+ desk cover |
| Deposit hold | Moderate | Large (credit card) |
| Tolls/fuel | €45 | €55 + admin fee |
| Total | €267 (~$290) | €249+ (~$271), bill can balloon |
Firefly is Hertz’s budget brand, run from the same group but as a lower-cost, lower-frills product with stricter card and coverage terms.
Complaints cite forced full coverage, card/deposit requirements and add-ons – one renter reported paying about three times the original expectation. Read the quote and contract carefully and decline extras you did not book.
No – it is off-airport via the Hertz group operation. Allow extra time for the transfer.
Effectively yes – a credit card in the main driver’s name. The “card mess” complaints usually stem from debit/prepaid cards plus coverage requirements.
The A28 north is toll-free since 2025; the A1 and A3 are tolled (electronic), with a €25–50 admin fee added by rentals. Take the Via Verde device if offered.
Only if the saving holds after coverage and deposit. If you want a smoother, in-terminal experience, the parent Hertz or Guerin (Enterprise franchisee) are calmer choices.
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: May 2026. Prices and policies change – always verify directly with the rental company.
