Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from San Francisco to Porto from $313

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Porto departing on 10/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Francisco to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
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
12:05 pm - 4:30 pmOPO  Porto-SFO San Francisco
36h 25m1 stop Zurich
$718Multiple Airlines
Tue, Jan 12 - Wed, Jan 27
Multiple Airlines Logo
7:25 pm - 11:15 amSFO  San Francisco-OPO Porto
31h 50m1 stop Zurich
Multiple Airlines Logo
6:00 am - 10:57 pmOPO  Porto-SFO San Francisco
24h 57m2 stops Frankfurt am Main Vancouver Intl
$718Multiple Airlines
Sun, Jan 17 - Fri, Jan 22
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
$725SWISS
Mon, Feb 1 - Thu, Feb 11
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
$725SWISS
Tue, Jan 19 - Tue, Feb 2
Lufthansa Logo
2:45 pm - 3:20 pmSFO  San Francisco-OPO Porto
16h 35m1 stop Frankfurt am Main
Lufthansa Logo
6:15 am - 7:35 pmOPO  Porto-SFO San Francisco
21h 20m1 stop Munich Franz Josef Strauss
$736Lufthansa
Sun, Jan 17 - Fri, Jan 22
Delta Logo
3:10 pm - 10:00 pmSFO  San Francisco-OPO Porto
22h 50m1 stop Paris Charles de Gaulle
Delta Logo
11:15 am - 11:45 amOPO  Porto-SFO San Francisco
32h 30m1 stop Amsterdam Schiphol
$743Delta
Mon, Jan 18 - Thu, Jan 21
Delta Logo
3:10 pm - 10:00 pmSFO  San Francisco-OPO Porto
22h 50m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 11:45 amOPO  Porto-SFO San Francisco
14h 45m1 stop Amsterdam Schiphol
$743Delta
Sun, Jan 17 - Fri, Jan 22
KLM Logo
3:10 pm - 10:00 pmSFO  San Francisco-OPO Porto
22h 50m1 stop Paris Charles de Gaulle
KLM Logo
5:00 am - 11:45 amOPO  Porto-SFO San Francisco
14h 45m1 stop Amsterdam Schiphol
$743KLM
Tue, Jan 12 - Wed, Jan 27
KLM Logo
3:10 pm - 10:00 pmSFO  San Francisco-OPO Porto
22h 50m1 stop Paris Charles de Gaulle
KLM Logo
5:00 am - 11:45 amOPO  Porto-SFO San Francisco
14h 45m1 stop Amsterdam Schiphol
$793KLM
Sat, Jan 16 - Fri, Jan 22
Lufthansa Logo
9:05 pm - 11:25 pmSFO  San Francisco-OPO Porto
18h 20m1 stop Munich Franz Josef Strauss
Lufthansa Logo
1:45 pm - 8:35 pmOPO  Porto-SFO San Francisco
37h 50m1 stop Munich Franz Josef Strauss
$813Lufthansa
Mon, Oct 19 - Thu, Oct 29

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Scandinavian Airlines flights from San Francisco to Porto

Our best Scandinavian Airlines deals on San Francisco to Porto flight tickets
Scandinavian Airlines
Sep 24
SFO7:00 amSan Francisco
26h 05m
2 stops
OPO5:05 pmPorto
Oct 1
OPO11:50 amPorto
34h 50m
1 stop
SFO2:40 pmSan Francisco
$792
Scandinavian Airlines
Sep 24
SFO7:00 amSan Francisco
26h 05m
2 stops
OPO5:05 pmPorto
Sep 30
OPO11:50 amPorto
34h 50m
1 stop
SFO2:40 pmSan Francisco
$832
Scandinavian Airlines
Aug 23
SFO4:45 pmSan Francisco
33h 55m
2 stops
OPO10:40 amPorto
Sep 11
OPO5:55 pmPorto
34h 12m
2 stops
SFO8:07 pmSan Francisco
$1,000

Lufthansa flights from San Francisco to Porto

Our best Lufthansa deals on San Francisco to Porto flight tickets
Lufthansa
Oct 19
SFO9:05 pmSan Francisco
18h 20m
1 stop
OPO11:25 pmPorto
Oct 29
OPO1:45 pmPorto
37h 50m
1 stop
SFO8:35 pmSan Francisco
$813
Lufthansa
Oct 16
SFO9:05 pmSan Francisco
18h 20m
1 stop
OPO11:25 pmPorto
Oct 23
OPO6:20 amPorto
20h 40m
1 stop
SFO7:00 pmSan Francisco
$849
Lufthansa
Oct 14
SFO9:05 pmSan Francisco
18h 20m
1 stop
OPO11:25 pmPorto
Oct 24
OPO6:20 amPorto
20h 40m
1 stop
SFO7:00 pmSan Francisco
$861

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 11, 2026.
Use the filters below to find and compare flights from San Francisco to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 1/12

8:25 am-12:05 pm

2 stops19h 40m

Porto

Wed 1/27

12:05 pm-4:30 pm

1 stop36h 25m

$718

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 1/17

7:25 pm-11:15 am

1 stop31h 50m

Porto

Fri 1/22

6:00 am-10:57 pm

2 stops24h 57m

$718

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 2/1

7:25 pm-11:15 am

1 stop31h 50m

Porto

Thu 2/11

12:05 pm-4:30 pm

1 stop36h 25m

$725

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 1/19

7:25 pm-11:15 am

1 stop31h 50m

Porto

Tue 2/2

12:05 pm-4:30 pm

1 stop36h 25m

$725

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 1/17

2:45 pm-3:20 pm

1 stop16h 35m

Porto

Fri 1/22

6:15 am-7:35 pm

1 stop21h 20m

$736

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 1/18

3:10 pm-10:00 pm

1 stop22h 50m

Porto

Thu 1/21

11:15 am-11:45 am

1 stop32h 30m

$743
Quickest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 1/17

3:10 pm-10:00 pm

1 stop22h 50m

Porto

Fri 1/22

5:00 am-11:45 am

1 stop14h 45m

$743

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 1/12

3:10 pm-10:00 pm

1 stop22h 50m

Porto

Wed 1/27

5:00 am-11:45 am

1 stop14h 45m

$743

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sat 1/16

3:10 pm-10:00 pm

1 stop22h 50m

Porto

Fri 1/22

5:00 am-11:45 am

1 stop14h 45m

$793

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 10/19

9:05 pm-11:25 pm

1 stop18h 20m

Porto

Thu 10/29

1:45 pm-8:35 pm

1 stop37h 50m

$813

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Porto from

How to get the cheapest flight ticket from San Francisco to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between San Francisco and Porto?

Prices are currently low for flights on this route.

Typical prices usually range from $905 to $1,283.
The lowest price recently found on this route was $721.

What is the cheapest month to fly to Porto?

The month of March is, on average, the cheapest month to fly to Porto from San Francisco, with most prices found around $612. If you aren’t able to travel during the month of March, then book flights to Porto from San Francisco during February instead. Flights to Porto in February, while not as cheap as those in March, still average around $675.

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

You are more likely to see cheaper flights to Porto from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $925 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from San Francisco for as low as $716 on momondo.

How have San Francisco to Porto flight prices changed over time?

As of August 2026, prices for San Francisco to Porto flights are approximately 23% more expensive when compared to flights at the same time last year.

When to book flights from San Francisco to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to Porto (SFO to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Porto

Fastest flight time

18h 15m

Direct flights

None
The fastest flight from San Francisco to Porto takes 18h 15m
There are no direct flights from San Francisco to Porto. There are no popular flight routes from San Francisco to Porto.
Search flight deals

Frequently asked questions about flying from San Francisco to Porto

  • How far is San Francisco to Porto by plane?

    Porto is 5565.0 mi away from San Francisco. Typically, this will take 18h 15m by plane in normal conditions.

  • When did momondo last update prices for flights from San Francisco Airport to Porto Airport?

    Prices for flights from San Francisco Airport to Porto Airport were last updated today.

  • How many operators does momondo search for flights from San Francisco Airport to Porto Airport?

  • How old do you have to be to fly from San Francisco Airport to Porto Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from San Francisco to Porto?

Best airlines flying from San Francisco to Porto

Compare and see reviews for airlines that fly from San Francisco to Porto with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $431Free CancellationRating
7.2
2,365 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.4
1,942 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
8,181 reviews
Search Lufthansa flights
SWISSPriceFrom $643Free CancellationRating
7.5
2,034 reviews
Search SWISS flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,479 reviews
Search Turkish Airlines flights
DeltaPriceFrom $661Free CancellationRating
7.8
8,505 reviews
Search Delta flights
United AirlinesPriceFrom $675Free CancellationRating
7.4
10,109 reviews
Search United Airlines flights
KLMPriceFrom $683Free CancellationRating
7.8
1,556 reviews
Search KLM flights
Air FrancePriceFrom $855Free CancellationRating
7.5
1,640 reviews
Search Air France flights
Air CanadaPriceFrom $860Free CancellationRating
7.1
11,462 reviews
Search Air Canada flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Aveiro
Matosinhos
Pinhao
Esposende
Chaves
Arcos de Valdevez
Viseu
Guimarães
Espinho
Lamego
Ponte de Lima
Mesao Frio
Penafiel
Caminha
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Porto?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto from San Francisco.

Can I find flights from San Francisco to Porto with flexible booking policies on momondo?

Flights from San Francisco to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from San Francisco to Porto?

Once all potential San Francisco to Porto flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from San Francisco to Porto right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Porto, momondo offers a useful price alert feature which will track prices for flights to Porto from San Francisco and alert you when they change.

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 9/10
Thu 9/17
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal