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Cheap flights from San Francisco to Porto from $364

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 8/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from San Francisco to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Turkish Airlines Logo
6:45 pm - 3:45 pm
SFO
-
OPO
37h 00m
1 stop
Turkish Airlines Logo
4:40 pm - 10:50 am
OPO
-
SFO
26h 10m
1 stop
$644Turkish Airlines
Wed, Apr 22 - Wed, Apr 29
Turkish Airlines Logo
6:45 pm - 11:30 pm
SFO
-
OPO
20h 45m
1 stop
Turkish Airlines Logo
4:50 pm - 4:40 pm
OPO
-
SFO
31h 50m
1 stop
$653Turkish Airlines
Tue, Apr 28 - Tue, May 5
Turkish Airlines Logo
12:55 pm - 3:40 pm
SFO
-
OPO
18h 45m
1 stop
Turkish Airlines Logo
4:40 pm - 10:50 am
OPO
-
SFO
26h 10m
1 stop
$669Turkish Airlines
Tue, Sep 8 - Wed, Sep 16
Turkish Airlines Logo
6:45 pm - 3:45 pm
SFO
-
OPO
37h 00m
1 stop
Turkish Airlines Logo
4:40 pm - 4:40 pm
OPO
-
SFO
32h 00m
1 stop
$671Turkish Airlines
Wed, Apr 29 - Wed, May 6
Turkish Airlines Logo
12:55 pm - 3:40 pm
SFO
-
OPO
18h 45m
1 stop
Turkish Airlines Logo
10:40 am - 4:40 pm
OPO
-
SFO
38h 00m
1 stop
$676Turkish Airlines
Tue, May 12 - Tue, May 19
Turkish Airlines Logo
6:45 pm - 9:40 am
SFO
-
OPO
30h 55m
1 stop
Turkish Airlines Logo
10:40 am - 10:50 am
OPO
-
SFO
32h 10m
1 stop
$681Turkish Airlines
Wed, Apr 22 - Mon, May 4
Scandinavian Airlines Logo
4:45 pm - 8:45 am
SFO
-
OPO
32h 00m
1 stop
Scandinavian Airlines Logo
10:25 am - 2:40 pm
OPO
-
SFO
36h 15m
1 stop
$696Scandinavian Airlines
Thu, Apr 30 - Thu, May 7
Turkish Airlines Logo
6:45 pm - 9:40 am
SFO
-
OPO
30h 55m
1 stop
Turkish Airlines Logo
4:40 pm - 10:50 am
OPO
-
SFO
26h 10m
1 stop
$699Turkish Airlines
Sun, May 3 - Sun, May 17
Turkish Airlines Logo
6:45 pm - 3:40 pm
SFO
-
OPO
36h 55m
1 stop
Turkish Airlines Logo
10:45 am - 4:40 pm
OPO
-
SFO
37h 55m
1 stop
$700Turkish Airlines
Mon, Apr 20 - Sun, Apr 26
Turkish Airlines Logo
6:45 pm - 3:50 pm
SFO
-
OPO
37h 05m
1 stop
Turkish Airlines Logo
10:40 am - 4:40 pm
OPO
-
SFO
38h 00m
1 stop
$706Turkish Airlines
Sun, Sep 6 - Tue, Sep 15

Scandinavian Airlines flights from San Francisco to Porto

Our best Scandinavian Airlines deals on San Francisco to Porto flight tickets
Scandinavian Airlines
Apr 30
SFO4:45 pmSan Francisco
32h 00m
1 stop
OPO8:45 amPorto
May 7
OPO10:25 amPorto
36h 15m
1 stop
SFO2:40 pmSan Francisco
$696
Scandinavian Airlines
Apr 9
SFO4:45 pmSan Francisco
32h 00m
1 stop
OPO8:45 amPorto
Apr 22
OPO11:50 amPorto
34h 50m
1 stop
SFO2:40 pmSan Francisco
$840
Scandinavian Airlines
Apr 8
SFO4:03 pmSan Francisco
41h 02m
2 stops
OPO5:05 pmPorto
Apr 25
OPO9:35 amPorto
37h 05m
1 stop
SFO2:40 pmSan Francisco
$860

TAP AIR PORTUGAL flights from San Francisco to Porto

Our best TAP AIR PORTUGAL deals on San Francisco to Porto flight tickets
TAP AIR PORTUGAL
Apr 4
SFO7:35 pmSan Francisco
19h 40m
1 stop
OPO11:15 pmPorto
Apr 13
OPO6:00 pmPorto
28h 35m
1 stop
SFO2:35 pmSan Francisco
$1,005
TAP AIR PORTUGAL
Apr 9
SFO7:55 pmSan Francisco
20h 45m
1 stop
OPO12:40 amPorto
Apr 22
OPO10:00 amPorto
31h 30m
2 stops
SFO9:30 amSan Francisco
$1,490

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 April 1, 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 - OPO

SFOOPO

San Francisco

Wed 4/22

6:45 pm-3:45 pm

1 stop37h 00m

Porto

Wed 4/29

4:40 pm-10:50 am

1 stop26h 10m

$644

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 4/28

6:45 pm-11:30 pm

1 stop20h 45m

Porto

Tue 5/5

4:50 pm-4:40 pm

1 stop31h 50m

$653
Quickest round-trip

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 9/8

12:55 pm-3:40 pm

1 stop18h 45m

Porto

Wed 9/16

4:40 pm-10:50 am

1 stop26h 10m

$669

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 4/29

6:45 pm-3:45 pm

1 stop37h 00m

Porto

Wed 5/6

4:40 pm-4:40 pm

1 stop32h 00m

$671

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 5/12

12:55 pm-3:40 pm

1 stop18h 45m

Porto

Tue 5/19

10:40 am-4:40 pm

1 stop38h 00m

$676

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 4/22

6:45 pm-9:40 am

1 stop30h 55m

Porto

Mon 5/4

10:40 am-10:50 am

1 stop32h 10m

$681

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 4/30

4:45 pm-8:45 am

1 stop32h 00m

Porto

Thu 5/7

10:25 am-2:40 pm

1 stop36h 15m

$696

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 5/3

6:45 pm-9:40 am

1 stop30h 55m

Porto

Sun 5/17

4:40 pm-10:50 am

1 stop26h 10m

$699

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 4/20

6:45 pm-3:40 pm

1 stop36h 55m

Porto

Sun 4/26

10:45 am-4:40 pm

1 stop37h 55m

$700

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 9/6

6:45 pm-3:50 pm

1 stop37h 05m

Porto

Tue 9/15

10:40 am-4:40 pm

1 stop38h 00m

$706

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

What is the cheapest month to fly to Porto?

The month of February is, on average, the cheapest month to fly to Porto from San Francisco, with most prices found around $578. If you aren’t able to travel during the month of February, then book flights to Porto from San Francisco during April instead. Flights to Porto in April, while not as cheap as those in February, still average around $687.

How far in advance should I book a flight 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 $907 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 $695 on momondo.

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

As of April 2026, prices for San Francisco to Porto flights are approximately 9% cheaper 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

14h 40m

Direct flights

None
The fastest flight from San Francisco to Porto takes 14h 40m
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 14h 40m 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
7.1
2,187 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $460Free CancellationRating
7.3
1,737 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
7,883 reviews
Search Lufthansa flights
SWISSPriceFrom $643Free CancellationRating
7.5
1,909 reviews
Search SWISS flights
IberiaPriceFrom $660Free CancellationRating
7.0
3,164 reviews
Search Iberia flights
DeltaPriceFrom $661Free CancellationRating
7.9
8,369 reviews
Search Delta flights
KLMPriceFrom $673Free CancellationRating
7.8
1,482 reviews
Search KLM flights
United AirlinesPriceFrom $675Free CancellationRating
7.4
9,533 reviews
Search United Airlines flights
Air CanadaPriceFrom $787Free CancellationRating
7.1
10,881 reviews
Search Air Canada flights
American AirlinesPriceFrom $1,000Free CancellationRating
7.1
11,549 reviews
Search American Airlines 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
Aveiro
Braga
Matosinhos
Lamego
Esposende
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Ponte de Lima
Viseu
Curia
Penafiel
Mesao Frio
Mira
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

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