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Cheap flights from San Francisco to Porto from $326

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
5:45 pm - 5:00 pmSFO  San Francisco-OPO Porto
16h 15m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
5:45 pm - 2:50 pmOPO  Porto-SFO San Francisco
29h 05m1 stop Kastrup Copenhagen
$629Scandinavian Airlines
Wed, Oct 28 - Fri, Nov 6
Scandinavian Airlines Logo
4:45 pm - 5:05 pmSFO  San Francisco-OPO Porto
16h 20m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
5:50 pm - 3:50 pmOPO  Porto-SFO San Francisco
29h 00m1 stop Kastrup Copenhagen
$629Scandinavian Airlines
Thu, Oct 22 - Thu, Oct 29
Multiple Airlines Logo
11:10 am - 6:50 amSFO  San Francisco-OPO Porto
35h 40m1 stop Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
12:05 pm - 4:30 pmOPO  Porto-SFO San Francisco
36h 25m1 stop Zurich
$723Multiple Airlines
Sun, Oct 18 - Tue, Nov 3
Multiple Airlines Logo
8:25 pm - 6:30 pmSFO  San Francisco-OPO Porto
15h 05m1 stop Zurich
Multiple Airlines Logo
6:15 am - 7:35 pmOPO  Porto-SFO San Francisco
21h 20m1 stop Munich Franz Josef Strauss
$728Multiple Airlines
Wed, Oct 28 - Fri, Nov 6
SWISS Logo
7:35 pm - 6:15 pmSFO  San Francisco-OPO Porto
14h 40m1 stop Zurich
SWISS Logo
12:05 pm - 4:30 pmOPO  Porto-SFO San Francisco
36h 25m1 stop Zurich
$735SWISS
Sun, Oct 18 - Wed, Nov 4
SWISS Logo
7:35 pm - 7:55 amSFO  San Francisco-OPO Porto
28h 20m1 stop Zurich
SWISS Logo
12:05 pm - 4:30 pmOPO  Porto-SFO San Francisco
36h 25m1 stop Zurich
$736SWISS
Sun, Oct 18 - Tue, Nov 3
United Airlines Logo
7:15 am - 9:30 amSFO  San Francisco-OPO Porto
18h 15m2 stops Houston George Bush Intcntl Newark
United Airlines Logo
6:00 am - 4:05 pmOPO  Porto-SFO San Francisco
18h 05m1 stop Frankfurt am Main
$746United Airlines
Mon, Dec 7 - Fri, Dec 11
Delta Logo
6:00 am - 10:35 amSFO  San Francisco-OPO Porto
21h 35m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle
Delta Logo
5:00 am - 7:32 pmOPO  Porto-SFO San Francisco
22h 32m2 stops Amsterdam Schiphol New York John F Kennedy Intl
$752Delta
Wed, Oct 28 - Fri, Nov 6
Delta Logo
2:15 pm - 3:30 pmSFO  San Francisco-OPO Porto
17h 15m2 stops Seattle/Tacoma Intl Amsterdam Schiphol
Delta Logo
5:00 am - 5:15 pmOPO  Porto-SFO San Francisco
20h 15m2 stops Amsterdam Schiphol Minneapolis St Paul
$757Delta
Sun, Oct 18 - Wed, Nov 4
United Airlines Logo
7:00 am - 9:30 amSFO  San Francisco-OPO Porto
18h 30m1 stop Newark
United Airlines Logo
12:35 pm - 11:59 pmOPO  Porto-SFO San Francisco
19h 24m1 stop Newark
$761United Airlines
Sun, Dec 6 - Wed, Dec 9

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SWISS flights from San Francisco to Porto

Our best SWISS deals on San Francisco to Porto flight tickets
SWISS
Oct 18
SFO7:35 pmSan Francisco
14h 40m
1 stop
OPO6:15 pmPorto
Nov 4
OPO12:05 pmPorto
36h 25m
1 stop
SFO4:30 pmSan Francisco
$735
SWISS
Oct 22
SFO7:35 pmSan Francisco
31h 50m
1 stop
OPO11:25 amPorto
Nov 5
OPO12:05 pmPorto
36h 25m
1 stop
SFO4:30 pmSan Francisco
$771
SWISS
Sep 2
SFO7:35 pmSan Francisco
14h 55m
1 stop
OPO6:30 pmPorto
Sep 7
OPO12:50 pmPorto
35h 25m
1 stop
SFO4:15 pmSan Francisco
$1,032

Delta flights from San Francisco to Porto

Our best Delta deals on San Francisco to Porto flight tickets
Delta
Oct 28
SFO6:00 amSan Francisco
21h 35m
2 stops
OPO10:35 amPorto
Nov 6
OPO5:00 amPorto
22h 32m
2 stops
SFO7:32 pmSan Francisco
$752
Delta
Oct 18
SFO2:15 pmSan Francisco
17h 15m
2 stops
OPO3:30 pmPorto
Nov 4
OPO5:00 amPorto
20h 15m
2 stops
SFO5:15 pmSan Francisco
$757
Delta
Oct 19
SFO6:20 amSan Francisco
20h 10m
2 stops
OPO10:30 amPorto
Oct 28
OPO11:15 amPorto
32h 30m
1 stop
SFO12:45 pmSan Francisco
$793

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

Wed 10/28

5:45 pm-5:00 pm

1 stop16h 15m

Porto

Fri 11/6

5:45 pm-2:50 pm

1 stop29h 05m

$629

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Thu 10/22

4:45 pm-5:05 pm

1 stop16h 20m

Porto

Thu 10/29

5:50 pm-3:50 pm

1 stop29h 00m

$629

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 10/18

11:10 am-6:50 am

1 stop35h 40m

Porto

Tue 11/3

12:05 pm-4:30 pm

1 stop36h 25m

$723

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 10/28

8:25 pm-6:30 pm

1 stop15h 05m

Porto

Fri 11/6

6:15 am-7:35 pm

1 stop21h 20m

$728

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 10/18

7:35 pm-6:15 pm

1 stop14h 40m

Porto

Wed 11/4

12:05 pm-4:30 pm

1 stop36h 25m

$735

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 10/18

7:35 pm-7:55 am

1 stop28h 20m

Porto

Tue 11/3

12:05 pm-4:30 pm

1 stop36h 25m

$736
Quickest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 12/7

7:15 am-9:30 am

2 stops18h 15m

Porto

Fri 12/11

6:00 am-4:05 pm

1 stop18h 05m

$746

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 10/28

6:00 am-10:35 am

2 stops21h 35m

Porto

Fri 11/6

5:00 am-7:32 pm

2 stops22h 32m

$752

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 10/18

2:15 pm-3:30 pm

2 stops17h 15m

Porto

Wed 11/4

5:00 am-5:15 pm

2 stops20h 15m

$757

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 12/6

7:00 am-9:30 am

1 stop18h 30m

Porto

Wed 12/9

12:35 pm-11:59 pm

1 stop19h 24m

$761

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 $972 to $1,307.
The lowest price recently found on this route was $629.

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 $945 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

$326

Fastest flight time

14h 30m

Direct flights

None
The best one-way flight to Porto from San Francisco in the past 72 hours is $326. The best round-trip flight deal from San Francisco to Porto found on momondo in the last 72 hours is $629.
The fastest flight from San Francisco to Porto takes 14h 30m
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 30m 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 $480Free CancellationRating
7.4
1,972 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
8,230 reviews
Search Lufthansa flights
SWISSPriceFrom $643Free CancellationRating
7.5
2,060 reviews
Search SWISS flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,479 reviews
Search Turkish Airlines flights
DeltaPriceFrom $661Free CancellationRating
7.8
8,544 reviews
Search Delta flights
United AirlinesPriceFrom $675Free CancellationRating
7.4
10,159 reviews
Search United Airlines flights
KLMPriceFrom $683Free CancellationRating
7.8
1,570 reviews
Search KLM flights
Air FrancePriceFrom $855Free CancellationRating
7.5
1,645 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
Aveiro
Braga
Pinhao
Matosinhos
Esposende
Chaves
Arcos de Valdevez
Viseu
Espinho
Guimarães
Lamego
Ponte de Lima
Mesao Frio
Penafiel
Caminha
Baiao
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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