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Cheap flights from San Francisco to Porto from $363

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 9/30. 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
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 - 3:40 pm
SFO
-
OPO
36h 55m
1 stop
Turkish Airlines Logo
10:45 am - 10:50 am
OPO
-
SFO
32h 05m
1 stop
$773Turkish Airlines
Tue, Sep 8 - Wed, Sep 16
Turkish Airlines Logo
12:55 pm - 11:30 pm
SFO
-
OPO
26h 35m
1 stop
Turkish Airlines Logo
10:45 am - 4:40 pm
OPO
-
SFO
37h 55m
1 stop
$774Turkish Airlines
Tue, Sep 8 - Wed, Sep 16
Turkish Airlines Logo
6:45 pm - 9:45 am
SFO
-
OPO
31h 00m
1 stop
Turkish Airlines Logo
10:55 am - 5:45 pm
OPO
-
SFO
37h 50m
1 stop
$776Turkish Airlines
Mon, Oct 19 - Wed, Oct 28
Turkish Airlines Logo
12:55 pm - 9:45 am
SFO
-
OPO
36h 50m
1 stop
Turkish Airlines Logo
4:50 pm - 4:40 pm
OPO
-
SFO
31h 50m
1 stop
$778Turkish Airlines
Mon, Sep 7 - Tue, Sep 15
American Airlines Logo
11:30 am - 4:00 pm
SFO
-
OPO
20h 30m
2 stops
American Airlines Logo
8:40 pm - 10:11 am
OPO
-
SFO
20h 31m
2 stops
$782American Airlines
Mon, Oct 19 - Wed, Oct 28
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
$785Turkish Airlines
Tue, Sep 22 - Tue, Sep 29
Turkish Airlines Logo
6:45 pm - 9:40 am
SFO
-
OPO
30h 55m
1 stop
Turkish Airlines Logo
10:40 am - 4:40 pm
OPO
-
SFO
38h 00m
1 stop
$786Turkish Airlines
Sun, Sep 6 - Tue, Sep 15
Turkish Airlines Logo
6:45 pm - 10:00 am
SFO
-
OPO
31h 15m
1 stop
Turkish Airlines Logo
10:40 am - 4:40 pm
OPO
-
SFO
38h 00m
1 stop
$787Turkish Airlines
Tue, Sep 22 - Tue, Sep 29
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
$790Turkish Airlines
Sun, Sep 6 - Tue, Sep 15
British Airways Logo
4:35 pm - 7:05 pm
SFO
-
OPO
18h 30m
1 stop
British Airways Logo
8:20 am - 9:26 pm
OPO
-
SFO
20h 06m
2 stops
$795British Airways
Wed, Sep 30 - Tue, Oct 27

Turkish Airlines flights from San Francisco to Porto

Our best Turkish Airlines deals on San Francisco to Porto flight tickets
Turkish Airlines
Sep 8
SFO6:45 pmSan Francisco
36h 55m
1 stop
OPO3:40 pmPorto
Sep 16
OPO10:45 amPorto
32h 05m
1 stop
SFO10:50 amSan Francisco
$773
Turkish Airlines
Sep 8
SFO12:55 pmSan Francisco
26h 35m
1 stop
OPO11:30 pmPorto
Sep 16
OPO10:45 amPorto
37h 55m
1 stop
SFO4:40 pmSan Francisco
$774
Turkish Airlines
Oct 19
SFO6:45 pmSan Francisco
31h 00m
1 stop
OPO9:45 amPorto
Oct 28
OPO10:55 amPorto
37h 50m
1 stop
SFO5:45 pmSan Francisco
$776

Delta flights from San Francisco to Porto

Our best Delta deals on San Francisco to Porto flight tickets
Delta
Oct 20
SFO11:35 amSan Francisco
19h 50m
2 stops
OPO3:25 pmPorto
Nov 3
OPO5:00 amPorto
14h 50m
1 stop
SFO11:50 amSan Francisco
$808
Delta
Oct 19
SFO11:30 amSan Francisco
19h 55m
2 stops
OPO3:25 pmPorto
Oct 28
OPO5:00 amPorto
14h 50m
1 stop
SFO12:50 pmSan Francisco
$825
Delta
Sep 19
SFO9:00 pmSan Francisco
29h 25m
1 stop
OPO10:25 amPorto
Sep 29
OPO6:15 amPorto
19h 45m
1 stop
SFO6:00 pmSan Francisco
$857

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 May 2, 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

Tue 9/8

6:45 pm-3:40 pm

1 stop36h 55m

Porto

Wed 9/16

10:45 am-10:50 am

1 stop32h 05m

$773

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 9/8

12:55 pm-11:30 pm

1 stop26h 35m

Porto

Wed 9/16

10:45 am-4:40 pm

1 stop37h 55m

$774

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 10/19

6:45 pm-9:45 am

1 stop31h 00m

Porto

Wed 10/28

10:55 am-5:45 pm

1 stop37h 50m

$776

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 9/7

12:55 pm-9:45 am

1 stop36h 50m

Porto

Tue 9/15

4:50 pm-4:40 pm

1 stop31h 50m

$778

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 10/19

11:30 am-4:00 pm

2 stops20h 30m

Porto

Wed 10/28

8:40 pm-10:11 am

2 stops20h 31m

$782

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 9/22

12:55 pm-3:40 pm

1 stop18h 45m

Porto

Tue 9/29

10:40 am-4:40 pm

1 stop38h 00m

$785

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 9/6

6:45 pm-9:40 am

1 stop30h 55m

Porto

Tue 9/15

10:40 am-4:40 pm

1 stop38h 00m

$786

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 9/22

6:45 pm-10:00 am

1 stop31h 15m

Porto

Tue 9/29

10:40 am-4:40 pm

1 stop38h 00m

$787

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

$790
Quickest round-trip

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 9/30

4:35 pm-7:05 pm

1 stop18h 30m

Porto

Tue 10/27

8:20 am-9:26 pm

2 stops20h 06m

$795

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 March instead. Flights to Porto in March, while not as cheap as those in February, still average around $610.

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 $900 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 $740 on momondo.

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

As of May 2026, prices for San Francisco to Porto flights are approximately 24% 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

15h 05m

Direct flights

None
The fastest flight from San Francisco to Porto takes 15h 05m
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 15h 05m 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
2,230 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.4
1,767 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
7,964 reviews
Search Lufthansa flights
SWISSPriceFrom $643Free CancellationRating
7.6
1,928 reviews
Search SWISS flights
IberiaPriceFrom $660Free CancellationRating
7.0
3,207 reviews
Search Iberia flights
United AirlinesPriceFrom $675Free CancellationRating
7.4
9,682 reviews
Search United Airlines flights
KLMPriceFrom $683Free CancellationRating
7.8
1,509 reviews
Search KLM flights
DeltaPriceFrom $778Free CancellationRating
7.9
8,460 reviews
Search Delta flights
Air CanadaPriceFrom $787Free CancellationRating
7.1
10,992 reviews
Search Air Canada flights
American AirlinesPriceFrom $1,000Free CancellationRating
7.1
11,671 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
Braga
Aveiro
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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