SFO - OPO

$338 Find Cheap Flights from San Francisco to Porto - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Porto departing on 10/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$642
Typical prices: $643-$1,287
TAP AIR PORTUGAL
Mon 10/5Mon 10/19
SFO - OPO • 1 stop
Cheapest one-way
$338
Typical prices: $493-$743
Air Canada
Mon 10/19
SFO - OPO • 2 stops
Nonstop flights
Not available
There are currently no direct flights between San Francisco and Porto. You'll need at least 1 connection.
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Top layover airports
Cheapest • Avg $834 (round-trip)
Shortest trip • 14h 02m (one-way)
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When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 32% compared to booking last minute.
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When to travel
Cheapest • 33% price drop
Most popular
Good to know
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Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Porto

Mon, Oct 5 - Mon, Oct 19
TAP AIR PORTUGAL Logo
4:30 pm - 3:00 pm
SFO
-
OPO
14h 30m
1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 1:35 pm
OPO
-
SFO
23h 05m
1 stop
$642TAP AIR PORTUGAL
Thu, Sep 17 - Tue, Sep 22
TAP AIR PORTUGAL Logo
4:30 pm - 5:00 pm
SFO
-
OPO
16h 30m
1 stop
TAP AIR PORTUGAL Logo
9:15 pm - 2:35 pm
OPO
-
SFO
25h 20m
1 stop
$643TAP AIR PORTUGAL
Thu, Oct 15 - Sun, Oct 25
TAP AIR PORTUGAL Logo
4:30 pm - 3:00 pm
SFO
-
OPO
14h 30m
1 stop
TAP AIR PORTUGAL Logo
4:00 pm - 3:45 pm
OPO
-
SFO
30h 45m
1 stop
$644TAP AIR PORTUGAL
Thu, Aug 13 - Wed, Aug 26
TAP AIR PORTUGAL Logo
4:30 pm - 4:50 pm
SFO
-
OPO
16h 20m
1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 2:30 pm
OPO
-
SFO
24h 00m
1 stop
$653TAP AIR PORTUGAL
Tue, Sep 8 - Wed, Sep 16
TAP AIR PORTUGAL Logo
7:20 pm - 12:40 am
SFO
-
OPO
21h 20m
2 stops
TAP AIR PORTUGAL Logo
10:30 pm - 2:30 pm
OPO
-
SFO
24h 00m
1 stop
$661TAP AIR PORTUGAL
Thu, Aug 27 - Thu, Sep 17
TAP AIR PORTUGAL Logo
4:30 pm - 9:00 am
SFO
-
OPO
32h 30m
1 stop
TAP AIR PORTUGAL Logo
5:05 am - 2:30 pm
OPO
-
SFO
17h 25m
1 stop
$667TAP AIR PORTUGAL
Tue, Sep 22 - Wed, Oct 7
TAP AIR PORTUGAL Logo
4:20 pm - 7:00 pm
SFO
-
OPO
18h 40m
1 stop
TAP AIR PORTUGAL Logo
5:05 am - 2:35 pm
OPO
-
SFO
17h 30m
1 stop
$668TAP AIR PORTUGAL
Mon, Sep 14 - Mon, Sep 21
TAP AIR PORTUGAL Logo
4:30 pm - 10:00 am
SFO
-
OPO
33h 30m
1 stop
TAP AIR PORTUGAL Logo
7:00 am - 2:05 pm
OPO
-
SFO
15h 05m
1 stop
$672TAP AIR PORTUGAL
Wed, Aug 19 - Mon, Aug 31
Multiple Airlines Logo
4:30 pm - 9:40 pm
SFO
-
OPO
21h 10m
2 stops
Multiple Airlines Logo
10:40 pm - 2:30 pm
OPO
-
SFO
23h 50m
2 stops
$681Multiple Airlines
Wed, Oct 14 - Sun, Oct 25
TAP AIR PORTUGAL Logo
4:35 pm - 5:00 pm
SFO
-
OPO
16h 25m
1 stop
TAP AIR PORTUGAL Logo
8:00 pm - 3:45 pm
OPO
-
SFO
26h 45m
1 stop
$684TAP AIR PORTUGAL
Booking Insights

KAYAK's insights & trends for San Francisco to Porto flights

Get data-powered insights and trends into flights from San Francisco to Porto to help you find the cheapest flights, the best time to fly and much more.

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Francisco to Porto departing in October.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Porto, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Porto is March, where tickets cost $609 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,317 and $1,141 respectively.

How far in advance should I book a flight from San Francisco to Porto?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to Porto, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Francisco to Porto, you should book around 5 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$338
Most popular time to fly with an average 45% increase in price.
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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Francisco to Porto

  • 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.

  • What is the cheapest flight from San Francisco to Porto?

    In the last 5 days, the lowest price for a flight from San Francisco to Porto was $338 for a one-way ticket and $642 for a round-trip.

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

    Yes

  • Which airports will I be using when flying from San Francisco to Porto?

    On your way to Porto, you’ll fly out from San Francisco. You’ll be landing at Porto.

  • Which aircraft models fly most regularly from San Francisco to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Francisco to Porto?

    SkyTeam, and Star Alliance are the airline alliances operating flights between San Francisco and Porto, with SkyTeam being the most commonly used for this route.

  • What is the most popular layover when flying to Porto from San Francisco?

    Lisbon is the most popular layover city among KAYAK users traveling from San Francisco to Porto.

  • Which is the best airline for flights from San Francisco to Porto, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from San Francisco to Porto are Delta and KLM. With an average price for the route of $1,247 and an overall rating of 7.8, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $1,040 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from San Francisco to Porto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to Porto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to Porto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from San Francisco to Porto

  • 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