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Cheap Flights from San Francisco to Porto

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Compare San Francisco International to Porto flight deals

Find the cheapest month or even day of the year to fly to Porto

Book the best Porto fare with no extra fees

Flight deals from San Francisco International to Porto

Looking for a cheap last-minute deal or the best return flight from San Francisco International to Porto? Find the lowest prices on one-way and return tickets right here.
Porto.$914 per passenger.Departing Tue, 14 Oct, returning Tue, 21 Oct.Return flight with Iberia and Vueling Airlines.Outbound indirect flight with Iberia, departs from San Francisco International on Tue, 14 Oct, arriving in Porto.Inbound indirect flight with Vueling Airlines, departs from Porto on Tue, 21 Oct, arriving in San Francisco International.Price includes taxes and charges.From $914, select.
Porto.$930 per passenger.Departing Sat, 20 Sep, returning Sat, 27 Sep.Return flight with Iberia and Vueling Airlines.Outbound indirect flight with Iberia, departs from San Francisco International on Sat, 20 Sep, arriving in Porto.Inbound indirect flight with Vueling Airlines, departs from Porto on Sat, 27 Sep, arriving in San Francisco International.Price includes taxes and charges.From $930, select.
Porto.$931 per passenger.Departing Wed, 5 Nov, returning Wed, 12 Nov.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Wed, 5 Nov, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Wed, 12 Nov, arriving in San Francisco International.Price includes taxes and charges.From $931, select.
Porto.$931 per passenger.Departing Fri, 5 Dec, returning Fri, 12 Dec.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Fri, 5 Dec, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Fri, 12 Dec, arriving in San Francisco International.Price includes taxes and charges.From $931, select.
Porto.$932 per passenger.Departing Mon, 23 Feb, returning Sun, 1 Mar.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Mon, 23 Feb, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Sun, 1 Mar, arriving in San Francisco International.Price includes taxes and charges.From $932, select.
Porto.$932 per passenger.Departing Fri, 28 Nov, returning Fri, 5 Dec.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Fri, 28 Nov, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Fri, 5 Dec, arriving in San Francisco International.Price includes taxes and charges.From $932, select.
Porto.$933 per passenger.Departing Mon, 2 Mar, returning Mon, 9 Mar.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Mon, 2 Mar, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Mon, 9 Mar, arriving in San Francisco International.Price includes taxes and charges.From $933, select.
Porto.$933 per passenger.Departing Mon, 29 Sep, returning Mon, 6 Oct.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from San Francisco International on Mon, 29 Sep, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Mon, 6 Oct, arriving in San Francisco International.Price includes taxes and charges.From $933, select.

Find the cheapest month to fly from San Francisco International to Porto

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Francisco International to Porto flights are currently cheapest in October.
Apr
Find prices
May
from $1,216
Jun
from $1,580
Jul
from $1,515
Aug
from $1,136
Sep
from $930
Oct
from $914
Nov
from $931
Dec
from $931
Jan
from $1,222
Feb
Find prices
Mar
from $933

San Francisco International to Porto: Alternative routes

Compare routes from San Francisco International to Porto below. You may find an airport to fly into that's cheaper, faster, or easier than Porto.

San Francisco to Porto: Flight information

The things to know before you go.
Cheapest flight found$914
Cheapest month to flyOctober

Finding cheap flights from San Francisco International to Porto: Frequently asked questions

The best price we found for a return flight from San Francisco International to Porto is $914. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from San Francisco International to Porto. But we found flights with one or more stops from $914.
As of April 2025, there are no flights flying from San Francisco International to Porto.
The cheapest month to fly from San Francisco International to Porto is usually April 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to Porto Airport on Tuesday, 14 October 2025.
No airlines currently offer direct flights between San Francisco International Airport and Porto Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Porto but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Porto is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Iberia offers the cheapest flight tickets to Porto.

Travelling from San Francisco International Airport (SFO) to Porto Airport (OPO): what you need to know

  • The timezone in Porto is UTC+0, which is seven hours ahead of San Francisco.

  • Get to the airport on time so you don't miss your SFO to OPO flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid sprinting to your gate.

  • Travelling during a peak month like August? Major public holidays and other popular periods can mean longer lines and delays at airport checkpoints. Be extra cautious and get there up to four hours before international flights and two hours before a domestic departure.

  • If you want to break up your flight, simply uncheck 'Direct flights only' when searching for your ticket from San Francisco International Airport to Porto Airport. Here are the most popular stopovers between SFO and OPO:

    • Newark Liberty International Airport

    • Montreal-Pierre Elliott Trudeau International Airport

    • Barcelona-El Prat Airport

How to find the cheapest flights from San Francisco International Airport (SFO) to Porto Airport (OPO)

  • $489 is the best price for a one-way San Francisco International Airport to Porto Airport flight. A return flight starts at $914. These fares may change depending on demand and availability.

  • To pick up cheap tickets from SFO to OPO, book early. Airlines tend to offer their best fares when flights are first released.

  • Getting cheap flights from San Francisco International Airport to Porto Airport is easier if you're flexible with your dates. Use the 'Whole month' function to see the best prices across every month and snap up a great deal.

  • Picking up cheap flights from SFO to OPO is a piece of cake with Price Alerts. All you need to do is set up one of these automatic alerts and we'll notify you when a new discounted fare appears.

  • Discover the perfect flight for you by using the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from San Francisco International Airport to Porto Airport, use the 'Sort by' tool. You can also filter results by airline, arrival and departure times, and number of stops.

Handy information about San Francisco International Airport (SFO)

  • 77.36% of flights that leave from San Francisco International Airport arrive at their destination on time.

  • Central San Francisco to San Francisco International Airport is around 21 kilometres. Depending on traffic, it'll take you about 20 minutes to get there if you're driving, catching a cab or ride-sharing.

  • The trip when using public transport takes about 45 minutes.

  • Get your trip off to a leisurely start by staying near SFO. Whether you're catching an early flight from San Francisco International Airport to Porto Airport or just don't want to be rushed, these stays are ideal:

Arriving at Porto Airport (OPO)

  • The last thing you need is a lengthy journey to your hotel if you're arriving on a late San Francisco International Airport to Porto Airport flight. Book one of these accommodation options near OPO instead:

  • Follow your own route with a Porto Airport rental car. Pick up your wheels from Klass Wagen, Goldcar or Drive & Go and experience more of Porto and beyond.

  • Get the best deal by reserving your vehicle from Porto Airport about three weeks before your trip.

Getting from Porto Airport (OPO) to central Porto

  • Porto Airport is roughly 16 kilometres from central Porto. The drive time takes around 20 minutes.

  • If you're travelling by public transport, expect a journey of roughly 50 minutes.

When to fly to Porto Airport (OPO)

  • The quietest month for a flight from San Francisco International Airport to Porto Airport is January, while August is the busiest. Choose the best time to go to Porto based on whether you prefer a more relaxed vibe or a faster pace.

  • Book your flight from San Francisco International Airport to Porto Airport for August if you want to explore Porto during its warmest month. Expect temperatures of between 14ºC (57ºF) and 32ºC (90ºF).

  • Search for cheap tickets from SFO to OPO in January if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between 3ºC (37ºF) and 14ºC (57ºF) on average.

Explore more of Portugal

  • Porto is easy to fall in love with, but there are so many other corners of Portugal you should also see. Around 274 kilometres south of Porto, a trip to Lisbon will keep your itinerary packed. Start with attractions like Torre de Belem Garden, Estrela At Lisbon - Tram 28 and Archaeological museum of Sao Jorge Castle.

  • If you're looking to explore another well-known destination in Portugal, consider Amadora, roughly 274 kilometres south of Porto. Jardim Porta do Viveiro Alfragide, Jardim Caracol do Victor Alfragide and Jardim e estatua Eduardo Jorge are key reasons to visit.

Plan the rest of your trip from San Francisco to Porto

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.