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Cheap flights from San Francisco to Porto from $336

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.
Scandinavian Airlines Logo
4:45 pm - 4:45 pmSFO  San Francisco-OPO Porto
16h 00m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
5:45 pm - 2:50 pmOPO  Porto-SFO San Francisco
29h 05m1 stop Kastrup Copenhagen
$509Scandinavian Airlines
Sat, Nov 7 - Fri, Nov 20
Multiple Airlines Logo
8:10 am - 7:00 amSFO  San Francisco-OPO Porto
14h 50m1 stop Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
1:45 pm - 7:35 pmOPO  Porto-SFO San Francisco
37h 50m1 stop Munich Franz Josef Strauss
$592Multiple Airlines
Tue, Oct 20 - Wed, Nov 4
Iberia Logo
2:05 pm - 4:00 pmSFO  San Francisco-OPO Porto
17h 55m2 stops Los Angeles Madrid Barajas
Iberia Logo
8:20 am - 9:57 pmOPO  Porto-SFO San Francisco
21h 37m2 stops Madrid Barajas Chicago O'Hare Intl
$596Iberia
Sun, Jan 10 - Wed, Feb 10
Delta Logo
9:10 am - 8:15 amSFO  San Francisco-OPO Porto
15h 05m1 stop New York John F Kennedy Intl
Delta Logo
10:15 am - 7:35 pmOPO  Porto-SFO San Francisco
17h 20m1 stop New York John F Kennedy Intl
$604Delta
Wed, Nov 11 - Thu, Nov 19
Delta Logo
7:00 am - 8:15 amSFO  San Francisco-OPO Porto
17h 15m1 stop New York John F Kennedy Intl
Delta Logo
10:15 am - 7:35 pmOPO  Porto-SFO San Francisco
17h 20m1 stop New York John F Kennedy Intl
$604Delta
Sun, Nov 8 - Thu, Nov 19
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
$608SWISS
Mon, Nov 2 - Wed, Nov 18
United Airlines Logo
5:00 am - 9:30 amSFO  San Francisco-OPO Porto
20h 30m2 stops Denver Intl Newark
United Airlines Logo
12:35 pm - 12:53 amOPO  Porto-SFO San Francisco
20h 18m2 stops Newark Chicago O'Hare Intl
$609United Airlines
Wed, Nov 11 - Wed, Nov 25
United Airlines Logo
12:05 pm - 9:30 amSFO  San Francisco-OPO Porto
13h 25m1 stop Newark
United Airlines Logo
12:35 pm - 6:48 amOPO  Porto-SFO San Francisco
26h 13m2 stops Newark Denver Intl
$609United Airlines
Wed, Nov 11 - Wed, Nov 25
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
$612SWISS
Mon, Nov 9 - Wed, Nov 18
Scandinavian Airlines Logo
4:45 pm - 11:05 amSFO  San Francisco-OPO Porto
34h 20m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
11:55 am - 2:50 pmOPO  Porto-SFO San Francisco
34h 55m1 stop Kastrup Copenhagen
$616Scandinavian Airlines
Sat, Jan 9 - Wed, Feb 10

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Scandinavian Airlines flights from San Francisco to Porto

Our best Scandinavian Airlines deals on San Francisco to Porto flight tickets
Scandinavian Airlines
Nov 7
SFO4:45 pmSan Francisco
16h 00m
1 stop
OPO4:45 pmPorto
Nov 20
OPO5:45 pmPorto
29h 05m
1 stop
SFO2:50 pmSan Francisco
$509
Scandinavian Airlines
Jan 9
SFO4:45 pmSan Francisco
34h 20m
1 stop
OPO11:05 amPorto
Feb 10
OPO11:55 amPorto
34h 55m
1 stop
SFO2:50 pmSan Francisco
$616
Scandinavian Airlines
Oct 3
SFO10:29 amSan Francisco
23h 51m
2 stops
OPO6:20 pmPorto
Oct 13
OPO4:20 pmPorto
30h 20m
2 stops
SFO2:40 pmSan Francisco
$996

Iberia flights from San Francisco to Porto

Our best Iberia deals on San Francisco to Porto flight tickets
Iberia
Jan 10
SFO2:05 pmSan Francisco
17h 55m
2 stops
OPO4:00 pmPorto
Feb 10
OPO8:20 amPorto
21h 37m
2 stops
SFO9:57 pmSan Francisco
$596
Iberia
Nov 10
SFO6:38 amSan Francisco
17h 02m
2 stops
OPO7:40 amPorto
Nov 17
OPO8:20 amPorto
22h 27m
2 stops
SFO10:47 pmSan Francisco
$610
Iberia
Nov 3
SFO8:47 amSan Francisco
18h 58m
2 stops
OPO11:45 amPorto
Nov 10
OPO8:40 pmPorto
31h 19m
2 stops
SFO7:59 pmSan Francisco
$621

momondo Fare Finder

 
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

Sat 11/7

4:45 pm-4:45 pm

1 stop16h 00m

Porto

Fri 11/20

5:45 pm-2:50 pm

1 stop29h 05m

$509

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 10/20

8:10 am-7:00 am

1 stop14h 50m

Porto

Wed 11/4

1:45 pm-7:35 pm

1 stop37h 50m

$592

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 1/10

2:05 pm-4:00 pm

2 stops17h 55m

Porto

Wed 2/10

8:20 am-9:57 pm

2 stops21h 37m

$596
Quickest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 11/11

9:10 am-8:15 am

1 stop15h 05m

Porto

Thu 11/19

10:15 am-7:35 pm

1 stop17h 20m

$604

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 11/8

7:00 am-8:15 am

1 stop17h 15m

Porto

Thu 11/19

10:15 am-7:35 pm

1 stop17h 20m

$604

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 11/2

7:25 pm-11:15 am

1 stop31h 50m

Porto

Wed 11/18

12:05 pm-4:30 pm

1 stop36h 25m

$608

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 11/11

5:00 am-9:30 am

2 stops20h 30m

Porto

Wed 11/25

12:35 pm-12:53 am

2 stops20h 18m

$609

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 11/11

12:05 pm-9:30 am

1 stop13h 25m

Porto

Wed 11/25

12:35 pm-6:48 am

2 stops26h 13m

$609

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 11/9

7:25 pm-11:15 am

1 stop31h 50m

Porto

Wed 11/18

12:05 pm-4:30 pm

1 stop36h 25m

$612

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sat 1/9

4:45 pm-11:05 am

1 stop34h 20m

Porto

Wed 2/10

11:55 am-2:50 pm

1 stop34h 55m

$616

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 $890 to $1,302.
The lowest price recently found on this route was $509.

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 $933 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 September 2026, prices for San Francisco to Porto flights are approximately 11% 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

Best Price Found

$336

Fastest flight time

17h 50m

Direct flights

None
The best one-way flight to Porto from San Francisco in the past 72 hours is $336. The best round-trip flight deal from San Francisco to Porto found on momondo in the last 72 hours is $509.
The fastest flight from San Francisco to Porto takes 17h 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

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 17h 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
7.2
2,379 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $460Free CancellationRating
7.4
1,992 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
8,234 reviews
Search Lufthansa flights
SWISSPriceFrom $643Free CancellationRating
7.5
2,083 reviews
Search SWISS flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,464 reviews
Search Turkish Airlines flights
KLMPriceFrom $683Free CancellationRating
7.8
1,575 reviews
Search KLM flights
United AirlinesPriceFrom $741Free CancellationRating
7.4
10,231 reviews
Search United Airlines flights
DeltaPriceFrom $764Free CancellationRating
7.8
8,594 reviews
Search Delta flights
Air FrancePriceFrom $855Free CancellationRating
7.5
1,651 reviews
Search Air France flights

Traveling to a place near Porto?

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

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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