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Cheap flights from San Francisco to Porto from $232

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
9:05 pm - 11:25 pmSFO  San Francisco-OPO Porto
18h 20m1 stop Munich Franz Josef Strauss
Multiple Airlines Logo
6:00 am - 9:17 amOPO  Porto-SFO San Francisco
35h 17m2 stops Frankfurt am Main Vancouver Intl
$711Multiple Airlines
Tue, Apr 13 - Tue, Apr 27
KLM Logo
3:05 pm - 10:00 pmSFO  San Francisco-OPO Porto
22h 55m1 stop Paris Charles de Gaulle
KLM Logo
5:00 am - 11:45 amOPO  Porto-SFO San Francisco
14h 45m1 stop Amsterdam Schiphol
$712KLM
Tue, Apr 13 - Tue, Apr 27
Delta Logo
3:05 pm - 3:25 pmSFO  San Francisco-OPO Porto
16h 20m1 stop Paris Charles de Gaulle
Delta Logo
5:00 am - 11:45 amOPO  Porto-SFO San Francisco
14h 45m1 stop Amsterdam Schiphol
$712Delta
Wed, Apr 7 - Wed, Apr 21
Multiple Airlines Logo
9:05 pm - 11:25 pmSFO  San Francisco-OPO Porto
18h 20m1 stop Munich Franz Josef Strauss
Multiple Airlines Logo
8:40 am - 4:15 pmOPO  Porto-SFO San Francisco
15h 35m1 stop Zurich
$712Multiple Airlines
Wed, Apr 7 - Thu, Apr 22
Delta Logo
9:00 am - 10:30 amSFO  San Francisco-OPO Porto
17h 30m1 stop New York John F Kennedy Intl
Delta Logo
11:45 am - 11:45 amOPO  Porto-SFO San Francisco
32h 00m1 stop Amsterdam Schiphol
$713Delta
Wed, Apr 7 - Mon, Apr 19
Air Canada Logo
8:00 am - 11:25 amSFO  San Francisco-OPO Porto
43h 25m2 stops Montreal Pierre Elliott Trudeau Intl Zurich
Air Canada Logo
6:00 am - 9:17 amOPO  Porto-SFO San Francisco
35h 17m2 stops Frankfurt am Main Vancouver Intl
$716Air Canada
Tue, Apr 6 - Tue, Apr 20
Air Canada Logo
8:00 am - 11:25 amSFO  San Francisco-OPO Porto
43h 25m2 stops Montreal Pierre Elliott Trudeau Intl Zurich
Air Canada Logo
6:00 am - 10:56 pmOPO  Porto-SFO San Francisco
24h 56m2 stops Frankfurt am Main Vancouver Intl
$716Air Canada
Tue, Apr 6 - Thu, Apr 22
SWISS Logo
7:35 pm - 11:25 amSFO  San Francisco-OPO Porto
31h 50m1 stop Zurich
SWISS Logo
8:40 am - 4:15 pmOPO  Porto-SFO San Francisco
15h 35m1 stop Zurich
$718SWISS
Wed, Apr 7 - Fri, Apr 23
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
$727SWISS
Thu, Feb 25 - Wed, Mar 3
KLM Logo
1:50 pm - 3:25 pmSFO  San Francisco-OPO Porto
17h 35m1 stop Amsterdam Schiphol
KLM Logo
4:10 pm - 11:45 amOPO  Porto-SFO San Francisco
27h 35m1 stop Amsterdam Schiphol
$774KLM
Sun, Nov 29 - Mon, Dec 14

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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
Oct 24
SFO7:35 pmSan Francisco
20h 20m
1 stop
OPO10:55 pmPorto
Nov 6
OPO8:30 amPorto
15h 35m
1 stop
SFO4:05 pmSan Francisco
$566
TAP AIR PORTUGAL
Oct 24
SFO7:35 pmSan Francisco
28h 55m
1 stop
OPO7:30 amPorto
Nov 6
OPO7:00 amPorto
17h 05m
1 stop
SFO4:05 pmSan Francisco
$567
TAP AIR PORTUGAL
Oct 24
SFO7:35 pmSan Francisco
28h 55m
1 stop
OPO7:30 amPorto
Nov 6
OPO7:00 amPorto
17h 05m
1 stop
SFO4:05 pmSan Francisco
$568

SWISS flights from San Francisco to Porto

Our best SWISS deals on San Francisco to Porto flight tickets
SWISS
Mar 3
SFO7:25 pmSan Francisco
31h 50m
1 stop
OPO11:15 amPorto
Mar 24
OPO12:05 pmPorto
36h 25m
1 stop
SFO5:30 pmSan Francisco
$705
SWISS
Nov 30
SFO7:25 pmSan Francisco
31h 50m
1 stop
OPO11:15 amPorto
Dec 7
OPO12:05 pmPorto
36h 25m
1 stop
SFO4:30 pmSan Francisco
$738
SWISS
Mar 15
SFO8:25 pmSan Francisco
15h 05m
1 stop
OPO6:30 pmPorto
Mar 21
OPO7:20 pmPorto
29h 10m
1 stop
SFO5:30 pmSan Francisco
$740

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

Tue 4/13

9:05 pm-11:25 pm

1 stop18h 20m

Porto

Tue 4/27

6:00 am-9:17 am

2 stops35h 17m

$711

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 4/13

3:05 pm-10:00 pm

1 stop22h 55m

Porto

Tue 4/27

5:00 am-11:45 am

1 stop14h 45m

$712
Quickest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 4/7

3:05 pm-3:25 pm

1 stop16h 20m

Porto

Wed 4/21

5:00 am-11:45 am

1 stop14h 45m

$712

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 4/7

9:05 pm-11:25 pm

1 stop18h 20m

Porto

Thu 4/22

8:40 am-4:15 pm

1 stop15h 35m

$712

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 4/7

9:00 am-10:30 am

1 stop17h 30m

Porto

Mon 4/19

11:45 am-11:45 am

1 stop32h 00m

$713

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 4/6

8:00 am-11:25 am

2 stops43h 25m

Porto

Tue 4/20

6:00 am-9:17 am

2 stops35h 17m

$716

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 4/6

8:00 am-11:25 am

2 stops43h 25m

Porto

Thu 4/22

6:00 am-10:56 pm

2 stops24h 56m

$716

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 4/7

7:35 pm-11:25 am

1 stop31h 50m

Porto

Fri 4/23

8:40 am-4:15 pm

1 stop15h 35m

$718

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Thu 2/25

7:25 pm-11:15 am

1 stop31h 50m

Porto

Wed 3/3

12:05 pm-4:30 pm

1 stop36h 25m

$727

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 11/29

1:50 pm-3:25 pm

1 stop17h 35m

Porto

Mon 12/14

4:10 pm-11:45 am

1 stop27h 35m

$774

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 $809 to $1,198.
The lowest price recently found on this route was $711.

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 $675. 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 $683.

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 $932 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 October 2026, prices for San Francisco to Porto flights are approximately 12% 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

Best Price Found

$232

Fastest flight time

14h 45m

Direct flights

None
The best one-way flight to Porto from San Francisco in the past 72 hours is $232. The best round-trip flight deal from San Francisco to Porto found on momondo in the last 72 hours is $711.
The fastest flight from San Francisco to Porto takes 14h 45m
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 45m 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
2,381 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $460Free CancellationRating
7.4
2,019 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
8,279 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,456 reviews
Search Turkish Airlines flights
SWISSPriceFrom $682Free CancellationRating
7.5
2,108 reviews
Search SWISS flights
KLMPriceFrom $683Free CancellationRating
7.8
1,591 reviews
Search KLM flights
United AirlinesPriceFrom $759Free CancellationRating
7.3
10,387 reviews
Search United Airlines flights
DeltaPriceFrom $764Free CancellationRating
7.8
8,650 reviews
Search Delta flights
Air FrancePriceFrom $855Free CancellationRating
7.5
1,651 reviews
Search Air France flights
Air CanadaPriceFrom $911Free CancellationRating
7.1
11,784 reviews
Search Air Canada flights

Traveling to a place near Porto?

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

An easier way to manage your Porto trip

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