$313 Find Cheap Flights from San Francisco to Porto - Compare and Save

Four cabin classes are available on flights from San Francisco to Porto:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

A nonstop flight from San Francisco to Porto takes 00m, covering 5,566 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Round-trip flights from San Francisco to Porto range from $768 to $1,215, with an average of $985 over the past 12 months. Anything below $768 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 12% above the $985 route average. Book 13 weeks before departure for the lowest fares.

One-way fares from San Francisco to Porto are currently lower than usual. Average one-way flight prices are about $357, which is 37% below the typical average for this route.

Porto Airport (OPO) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include:

• GREEN MOTION
• Drive on Holiday
• Klass Wagen
• Goldcar Rental SP
• Sixt

Flights from San Francisco to Porto usually depart from San Francisco (SFO) and arrive at Porto (OPO).

One-stop flights from San Francisco to Porto most commonly connect through:

• Lisbon Humberto Delgado (LIS) - 46% of one-stop connections
• Montreal Pierre Elliott Trudeau Intl (YUL) - 13% of one-stop connections
• Zurich (ZRH) - 7% of one-stop connections
• Kastrup Copenhagen (CPH) - 6% of one-stop connections

Yes. Flexible dates can save you up to 25% on flights from San Francisco to Porto. Tuesday is the cheapest departure day at $870 round-trip on average, while Saturday is the most expensive at $1,160, a difference of $290.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Flying via Newark (EWR) gives the shortest average 1-stop total travel time at 15h 10m, compared with 15h 16m via Paris Charles de Gaulle (CDG) and 15h 31m via Zurich (ZRH).

Porto is 8 hours ahead of San Francisco (Western European Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Porto are Ribeira Square, Avenida dos Aliados and Boavista Square. These are among the most viewed places in Porto on KAYAK.

Porto's Francisco Sa Carneiro Airport (OPO) serves as the entry point for the entire region of northern Portugal. If you want to travel to other towns like Braga, renowned for its religious history and architecture, or Coimbra, renowned for having a well-preserved medieval town inside its boundaries, you may fly into OPO.

With OPO's Arrivals Hall hosting a number of car rental agencies' counters, you will find it easy to rent a car for your movement flexibility within and outside Porto. Among the car rental agencies with a car rental booth at OPO are SIXT, Budget, Hertz, and Avis.

After deplaning from your San Francisco to Porto flight at OPO, you will connect to the city center via Metro Line E, a rental car, a bus, or a taxi. However, you should note that a bus travels between the airport and the city center throughout the night. Also, inquire about the toll pass if you're renting a car.

One of the eco-friendly airlines you should consider for your flight from San Francisco to Porto is KLM. The airline has made significant efforts to become more eco-friendly. It has implemented sustainable fuel initiatives, reduced emissions through efficient aircraft operations, and invested in carbon offset programs.