SFO - OPO

$334 Find Cheap Flights from San Francisco to Porto - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$629
Typical prices: $749-$1,223
Scandinavian Airlines
Wed 11/14Wed 11/21
SFO - OPO • 1 stop
Cheapest one-way
$334
Typical prices: $472-$685
Multiple Airlines
Sat 9/29
SFO - OPO • 3 stops
Nonstop flights
There are currently no direct flights between San Francisco and Porto. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 13 weeks in advance save around 42% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 36% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $710 (round-trip)
Shortest trip • 15h 05m (one-way)
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Francisco to Porto (SFO-OPO)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Porto

Sat, Nov 14 - Sat, Nov 21
Scandinavian Airlines Logo
4:45 pm - 4:45 pmSFO  San Francisco-OPO Porto
16h 00m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
12:00 pm - 2:50 pmOPO  Porto-SFO San Francisco
34h 50m1 stop Kastrup Copenhagen
$629Scandinavian Airlines
Mon, Nov 30 - Sun, Dec 6
Scandinavian Airlines Logo
4:45 pm - 11:05 amSFO  San Francisco-OPO Porto
34h 20m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
5:35 pm - 2:50 pmOPO  Porto-SFO San Francisco
29h 15m1 stop Kastrup Copenhagen
$634Scandinavian Airlines
Sun, Nov 29 - Wed, Dec 16
Multiple Airlines Logo
7:25 pm - 11:15 amSFO  San Francisco-OPO Porto
31h 50m1 stop Zurich
Multiple Airlines Logo
6:00 am - 11:05 amOPO  Porto-SFO San Francisco
37h 05m2 stops Frankfurt am Main Toronto Pearson Intl
$731Multiple Airlines
Sun, Nov 29 - Wed, Dec 16
Multiple Airlines Logo
8:25 am - 12:05 pmSFO  San Francisco-OPO Porto
19h 40m2 stops Montreal Pierre Elliott Trudeau Intl Brussels Bruxelles-National
Multiple Airlines Logo
6:00 am - 11:05 amOPO  Porto-SFO San Francisco
37h 05m2 stops Frankfurt am Main Toronto Pearson Intl
$734Multiple Airlines
Wed, Dec 2 - Tue, Dec 8
Delta Logo
9:10 am - 8:15 amSFO  San Francisco-OPO Porto
15h 05m1 stop New York John F Kennedy Intl
Delta Logo
11:15 am - 11:45 amOPO  Porto-SFO San Francisco
32h 30m1 stop Amsterdam Schiphol
$744Delta
Wed, Dec 2 - Thu, Dec 10
Delta Logo
7:00 am - 8:15 amSFO  San Francisco-OPO Porto
17h 15m1 stop New York John F Kennedy Intl
Delta Logo
11:15 am - 11:45 amOPO  Porto-SFO San Francisco
32h 30m1 stop Amsterdam Schiphol
$744Delta
Tue, Dec 1 - Wed, Dec 9
United Airlines Logo
6:15 am - 9:30 amSFO  San Francisco-OPO Porto
19h 15m2 stops Denver Intl Newark
United Airlines Logo
6:00 am - 4:05 pmOPO  Porto-SFO San Francisco
18h 05m1 stop Frankfurt am Main
$746United Airlines
Wed, Dec 2 - Tue, Dec 8
United Airlines Logo
5:00 am - 9:30 amSFO  San Francisco-OPO Porto
20h 30m2 stops Houston George Bush Intcntl Newark
United Airlines Logo
12:35 pm - 8:10 pmOPO  Porto-SFO San Francisco
15h 35m1 stop Frankfurt am Main
$746United Airlines
Sun, Nov 29 - Mon, Dec 7
SWISS Logo
7:25 pm - 11:15 amSFO  San Francisco-OPO Porto
31h 50m1 stop Zurich
SWISS Logo
7:20 pm - 4:30 pmOPO  Porto-SFO San Francisco
29h 10m1 stop Zurich
$748SWISS
Mon, Nov 30 - Mon, Dec 7
SWISS Logo
7:25 pm - 11:15 amSFO  San Francisco-OPO Porto
31h 50m1 stop Zurich
SWISS Logo
12:05 pm - 4:30 pmOPO  Porto-SFO San Francisco
36h 25m1 stop Zurich
$748SWISS
Booking Insights

Price, demand and travel trends for San Francisco to Porto flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from San Francisco to Porto with more confidence.

How much is a round-trip flight from San Francisco to Porto?

Round-trip flights from San Francisco to Porto start at $629. Prices are below average for this route right now, with typical round-trip fares ranging from $749 to $1,223. The lowest price found in the past 5 days was $629 on Scandinavian Airlines.

What's the cheapest day of the week to fly from San Francisco to Porto?

Wednesday is the cheapest day of the week to fly from San Francisco to Porto, it is 12% cheaper than the average day. Saturday is the most expensive day with flight prices 21% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from San Francisco to Porto?

  • February is the cheapest month to fly from San Francisco to Porto at $625 round-trip.
  • June ($1,303) and July ($1,218) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 108% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from San Francisco to Porto the cheapest?

Flights from San Francisco to Porto are cheapest 13 weeks before departure. Booking in this window typically costs about 42% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for San Francisco to Porto flights

Low season

January

Cheapest flight

$334
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from San Francisco to Porto

When to book flights from San Francisco to Porto

Are your dates flexible? Find out the best times to travel from San Francisco to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your San Francisco to Porto flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which other cities can I visit after deplaning from my San Francisco to Porto flight at Francisco Sá Carneiro (OPO)?

    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.

  • Can I rent a car for my movement flexibility after deplaning from my San Francisco to Porto flight at Francisco Sá Carneiro (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.

  • How can I connect to the city after deplaning from my San Francisco to Porto flight at Francisco Sá Carneiro (OPO)?

    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.

  • Which eco-friendly airline should I consider for my San Francisco to Porto flight?

    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.

  • Which airports can I use when flying from San Francisco to Porto?

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

  • What cabin classes can I book on flights from San Francisco to Porto?

    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.

  • Which airports do connecting flights from San Francisco to Porto pass through?

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

    • Lisbon Humberto Delgado (LIS) - 41% of one-stop connections
    • Montreal Pierre Elliott Trudeau Intl (YUL) - 15% of one-stop connections
    • Zurich (ZRH) - 8% of one-stop connections
    • Kastrup Copenhagen (CPH) - 6% of one-stop connections

    Lisbon Humberto Delgado (LIS) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from San Francisco to Porto?

    Yes. Being flexible with your travel dates can save you up to 28% on the San Francisco to Porto route. Wednesday is the cheapest departure day at $860 round-trip on average, while Saturday is the most expensive at $1,182, a difference of $322. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Porto?

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

  • How expensive are last-minute San Francisco to Porto flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 21% above the route average of $973. Book 13 weeks before departure for the lowest fares.

  • How long is a flight from San Francisco to Porto?

    A nonstop flight from San Francisco to Porto takes 0h 00m, covering 5,566 miles.

  • Do I need a passport to fly from San Francisco to Porto?

    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.

  • How are flight prices from San Francisco to Porto looking right now?

    One-way fares from San Francisco to Porto are currently lower than usual. Average one-way flight prices are about $366, which is 35% below the typical average for this route.

  • How much time can I save by choosing a different layover airport from San Francisco to Porto?

    Flying via Newark (EWR) gives the shortest average 1-stop total travel time at 15h 05m, compared with 15h 30m via Zurich (ZRH) and 15h 30m via Paris Charles de Gaulle (CDG).

  • What is the time difference between San Francisco and Porto?

    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.

  • What car rental options are available at Porto Airport (OPO)?

    Porto Airport (OPO) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include:
    · Klass Wagen
    · Drive on Holiday
    · GREEN MOTION
    · Goldcar Rental SP
    · SURPRICE CAR RENTAL

  • How much should I expect to pay for a San Francisco to Porto flight?

    Round-trip flights from San Francisco to Porto range from $749 to $1,223, with an average of $973 over the past 12 months. Anything below $749 counts as a good deal.

Your guide to booking San Francisco to Porto flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Wednesday departure instead of Saturday. On this route, Wednesday flights average $860 - about $322 less than Saturday (27% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 13 weeks before you fly. On this route, that window historically saves about 42% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your San Francisco to Porto trip for February. Fares historically average $625 round-trip in that month - typically $678 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Porto Airport.
    - Opo Hotel Porto Aeroporto
  • When planning your flight from San Francisco to Porto, include at least a single layover. Most airlines servicing this route would make at least one stop before you could land at Francisco Sá Carneiro (OPO). Some of the common layovers on this route include Amsterdam Airport Schiphol (AMS), Adolfo Suárez Madrid-Barajas Airport (MAD), and Dallas/Fort Worth (DFW).
  • If you plan to travel with your pet from San Francisco to Porto, prioritize booking your flight with Delta Airlines. The airline's pet-friendly would allow you to travel with your caged dog or cat in the cabin provided it can fit under the chair. Larger pets would travel as cargo. You should, however, note that your pet will attract some extra charges. You will also need to present a current health certificate issued by a veterinarian.
  • One of the advantages of considering British Airways for your flight from San Francisco to Porto is its ticket upgrading benefits. During your first layover, the airline may send an email requesting to upgrade your ticket and enjoy the first-class amenities at a discounted price.
  • Although all airlines consider Persons with Reduced Mobility (PRMs), you should prioritize booking your flight ticket with Air France. To ensure comfort and enhanced access, the airline offers priority for PRMs, complimentary wheelchair access in SFO and OPO ticket counters, and a team of well-trained staff to care for PRMs' needs.
  • One of the airlines travelers with kids should consider for their flight from San Francisco to Porto is SWISS. To ensure a pleasant journey for your little ones, the airline may offer children's meals, kid-friendly entertainment options, and special toys or coloring books to keep them engaged throughout the flight.

Everything you need to know for your flight from San Francisco to Porto

Information on your arrival and departure airports