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Cheap flights from San Francisco to Porto from $357

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 5/3. 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.
Multiple Airlines Logo
7:40 pm - 6:50 am
SFO
-
OPO
27h 10m
1 stop
Multiple Airlines Logo
7:35 pm - 5:55 pm
OPO
-
SFO
30h 20m
1 stop
$636Multiple Airlines
dt., abr. 7 - dc., abr. 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
$646Turkish Airlines
dt., maig 12 - dt., maig 26
Turkish Airlines Logo
6:45 pm - 10:00 am
SFO
-
OPO
31h 15m
1 stop
Turkish Airlines Logo
4:50 pm - 4:40 pm
OPO
-
SFO
31h 50m
1 stop
$647Turkish Airlines
dt., maig 12 - dt., maig 26
Turkish Airlines Logo
6:45 pm - 3:50 pm
SFO
-
OPO
37h 05m
1 stop
Turkish Airlines Logo
4:40 pm - 4:40 pm
OPO
-
SFO
32h 00m
1 stop
$663Turkish Airlines
dg., abr. 26 - dc., maig 13
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
$666Turkish Airlines
dt., maig 12 - dt., maig 26
Turkish Airlines Logo
6:45 pm - 3:50 pm
SFO
-
OPO
37h 05m
1 stop
Turkish Airlines Logo
4:50 pm - 4:40 pm
OPO
-
SFO
31h 50m
1 stop
$667Turkish Airlines
dg., abr. 19 - dt., abr. 28
Turkish Airlines Logo
12:55 pm - 11:30 pm
SFO
-
OPO
26h 35m
1 stop
Turkish Airlines Logo
4:50 pm - 4:40 pm
OPO
-
SFO
31h 50m
1 stop
$671Turkish Airlines
dj., abr. 16 - dl., abr. 20
Multiple Airlines Logo
3:15 pm - 11:50 pm
SFO
-
OPO
24h 35m
2 stops
Multiple Airlines Logo
8:15 pm - 1:15 pm
OPO
-
SFO
25h 00m
2 stops
$674Multiple Airlines
dc., abr. 22 - dl., abr. 27
Turkish Airlines Logo
12:55 pm - 11:30 pm
SFO
-
OPO
26h 35m
1 stop
Turkish Airlines Logo
4:50 pm - 4:40 pm
OPO
-
SFO
31h 50m
1 stop
$675Turkish Airlines
dt., abr. 7 - dt., abr. 14
Multiple Airlines Logo
3:15 pm - 11:55 pm
SFO
-
OPO
24h 40m
2 stops
Multiple Airlines Logo
10:00 pm - 1:15 pm
OPO
-
SFO
23h 15m
2 stops
$682Multiple Airlines
dt., abr. 7 - dt., abr. 14

Turkish Airlines flights from San Francisco to Porto

Our best Turkish Airlines deals on San Francisco to Porto flight tickets
Turkish Airlines
May 12
SFO6:45 pmSan Francisco
31h 15m
1 stop
OPO10:00 amPorto
May 26
OPO10:40 amPorto
38h 00m
1 stop
SFO4:40 pmSan Francisco
$646
Turkish Airlines
May 12
SFO6:45 pmSan Francisco
31h 15m
1 stop
OPO10:00 amPorto
May 26
OPO4:50 pmPorto
31h 50m
1 stop
SFO4:40 pmSan Francisco
$647
Turkish Airlines
Apr 26
SFO6:45 pmSan Francisco
37h 05m
1 stop
OPO3:50 pmPorto
May 13
OPO4:40 pmPorto
32h 00m
1 stop
SFO4:40 pmSan Francisco
$663

Iberia flights from San Francisco to Porto

Our best Iberia deals on San Francisco to Porto flight tickets
Iberia
Apr 19
SFO7:40 pmSan Francisco
17h 40m
1 stop
OPO9:20 pmPorto
Apr 28
OPO12:25 pmPorto
19h 34m
2 stops
SFO11:59 pmSan Francisco
$726
Iberia
Mar 23
SFO9:40 pmSan Francisco
27h 00m
2 stops
OPO7:40 amPorto
Mar 27
OPO8:20 amPorto
21h 59m
2 stops
SFO11:19 pmSan Francisco
$1,670
Iberia
Mar 23
SFO8:00 amSan Francisco
25h 00m
2 stops
OPO4:00 pmPorto
Mar 27
OPO8:20 amPorto
19h 53m
2 stops
SFO9:13 pmSan Francisco
$1,791

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 març 14, 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

dt. 4/7

7:40 pm-6:50 am

1 stop27h 10m

Porto

dc. 4/15

7:35 pm-5:55 pm

1 stop30h 20m

$636

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

dt. 5/12

6:45 pm-10:00 am

1 stop31h 15m

Porto

dt. 5/26

10:40 am-4:40 pm

1 stop38h 00m

$646

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

dt. 5/12

6:45 pm-10:00 am

1 stop31h 15m

Porto

dt. 5/26

4:50 pm-4:40 pm

1 stop31h 50m

$647

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

dg. 4/26

6:45 pm-3:50 pm

1 stop37h 05m

Porto

dc. 5/13

4:40 pm-4:40 pm

1 stop32h 00m

$663

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

dt. 5/12

6:45 pm-11:30 pm

1 stop20h 45m

Porto

dt. 5/26

4:50 pm-4:40 pm

1 stop31h 50m

$666

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

dg. 4/19

6:45 pm-3:50 pm

1 stop37h 05m

Porto

dt. 4/28

4:50 pm-4:40 pm

1 stop31h 50m

$667

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

dj. 4/16

12:55 pm-11:30 pm

1 stop26h 35m

Porto

dl. 4/20

4:50 pm-4:40 pm

1 stop31h 50m

$671

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

dc. 4/22

3:15 pm-11:50 pm

2 stops24h 35m

Porto

dl. 4/27

8:15 pm-1:15 pm

2 stops25h 00m

$674

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

dt. 4/7

12:55 pm-11:30 pm

1 stop26h 35m

Porto

dt. 4/14

4:50 pm-4:40 pm

1 stop31h 50m

$675
Quickest round-trip

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

dt. 4/7

3:15 pm-11:55 pm

2 stops24h 40m

Porto

dt. 4/14

10:00 pm-1:15 pm

2 stops23h 15m

$682

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 $894 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 March 2026, prices for San Francisco to Porto flights are approximately 13% 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 50m

Direct flights

None
The fastest flight from San Francisco to Porto takes 14h 50m
There are no direct flights from San Francisco to Porto. There are no popular flight routes from San Francisco to Porto.
Search flight deals

  • How far is San Francisco to Porto by plane?

    Porto is 5565.0 mi away from San Francisco. Typically, this will take 14h 50m 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
2,166 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.3
1,715 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
7,849 reviews
Search Lufthansa flights
SWISSPriceFrom $643Free CancellationRating
7.5
1,897 reviews
Search SWISS flights
IberiaPriceFrom $660Free CancellationRating
7.0
3,136 reviews
Search Iberia flights
DeltaPriceFrom $661Free CancellationRating
7.9
8,294 reviews
Search Delta flights
KLMPriceFrom $673Free CancellationRating
7.8
1,471 reviews
Search KLM flights
United AirlinesPriceFrom $675Free CancellationRating
7.4
9,427 reviews
Search United Airlines flights
Air CanadaPriceFrom $787Free CancellationRating
7.1
10,801 reviews
Search Air Canada flights
American AirlinesPriceFrom $1,000Free CancellationRating
7.1
11,471 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
Esposende
Lamego
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Viseu
Ponte de Lima
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.

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dl. 4/13
dl. 4/20
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