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Cheap flights from San Francisco to Porto from $217

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
7:15 pm - 5:00 pmSFO  San Francisco-OPO Porto
13h 45m1 stop Lisbon Humberto Delgado
Multiple Airlines Logo
11:40 am - 2:45 pmOPO  Porto-SFO San Francisco
35h 05m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$654Multiple Airlines
Fri, Nov 27 - Fri, Dec 4
Scandinavian Airlines Logo
4:45 pm - 12:05 pmSFO  San Francisco-OPO Porto
35h 20m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
11:55 am - 2:50 pmOPO  Porto-SFO San Francisco
34h 55m1 stop Kastrup Copenhagen
$674Scandinavian Airlines
Sat, Jan 16 - Wed, Feb 10
Multiple Airlines Logo
7:15 pm - 7:30 amSFO  San Francisco-OPO Porto
28h 15m1 stop Lisbon Humberto Delgado
Multiple Airlines Logo
11:40 am - 2:45 pmOPO  Porto-SFO San Francisco
35h 05m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$682Multiple Airlines
Fri, Nov 27 - Fri, Dec 4
Scandinavian Airlines Logo
4:45 pm - 4:45 pmSFO  San Francisco-OPO Porto
16h 00m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
11:55 am - 2:50 pmOPO  Porto-SFO San Francisco
34h 55m1 stop Kastrup Copenhagen
$690Scandinavian Airlines
Sat, Jan 9 - Wed, Feb 17
SWISS Logo
7:35 pm - 7:55 amSFO  San Francisco-OPO Porto
28h 20m1 stop Zurich
SWISS Logo
8:40 am - 4:15 pmOPO  Porto-SFO San Francisco
15h 35m1 stop Zurich
$701SWISS
Sun, Apr 11 - Thu, Apr 22
SWISS Logo
7:35 pm - 7:55 amSFO  San Francisco-OPO Porto
28h 20m1 stop Zurich
SWISS Logo
8:40 am - 4:15 pmOPO  Porto-SFO San Francisco
15h 35m1 stop Zurich
$701SWISS
Mon, Apr 12 - Thu, Apr 22
Lufthansa Logo
8:05 pm - 11:25 pmSFO  San Francisco-OPO Porto
19h 20m1 stop Munich Franz Josef Strauss
Lufthansa Logo
6:20 am - 6:15 pmOPO  Porto-SFO San Francisco
19h 55m1 stop Munich Franz Josef Strauss
$704Lufthansa
Tue, Apr 13 - Tue, Apr 20
Air Canada Logo
8:00 am - 6:30 pmSFO  San Francisco-OPO Porto
50h 30m2 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 - Fri, Apr 16
Air Canada Logo
8:00 am - 6:30 pmSFO  San Francisco-OPO Porto
50h 30m2 stops Montreal Pierre Elliott Trudeau Intl Zurich
Air Canada Logo
6:00 am - 8:31 pmOPO  Porto-SFO San Francisco
22h 31m2 stops Frankfurt am Main Vancouver Intl
$716Air Canada
Tue, Apr 6 - Wed, Apr 14
Lufthansa Logo
8:05 pm - 11:25 pmSFO  San Francisco-OPO Porto
19h 20m1 stop Munich Franz Josef Strauss
Lufthansa Logo
6:00 am - 12:29 amOPO  Porto-SFO San Francisco
26h 29m2 stops Frankfurt am Main Chicago O'Hare Intl
$729Lufthansa
Wed, Apr 7 - Fri, Apr 16

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United Airlines flights from San Francisco to Porto

Our best United Airlines deals on San Francisco to Porto flight tickets
United Airlines
Nov 23
SFO6:15 amSan Francisco
19h 15m
2 stops
OPO9:30 amPorto
Dec 9
OPO6:00 amPorto
18h 05m
1 stop
SFO4:05 pmSan Francisco
$768
United Airlines
Dec 9
SFO12:00 pmSan Francisco
13h 30m
1 stop
OPO9:30 amPorto
Dec 16
OPO6:00 amPorto
22h 10m
1 stop
SFO8:10 pmSan Francisco
$774
United Airlines
Dec 1
SFO12:45 amSan Francisco
24h 45m
2 stops
OPO9:30 amPorto
Dec 9
OPO6:00 amPorto
18h 05m
1 stop
SFO4:05 pmSan Francisco
$778

KLM flights from San Francisco to Porto

Our best KLM deals on San Francisco to Porto flight tickets
KLM
Nov 25
SFO1:50 pmSan Francisco
17h 35m
1 stop
OPO3:25 pmPorto
Dec 2
OPO11:15 amPorto
32h 30m
1 stop
SFO11:45 amSan Francisco
$769
KLM
Nov 29
SFO1:50 pmSan Francisco
17h 35m
1 stop
OPO3:25 pmPorto
Dec 15
OPO5:55 amPorto
21h 06m
2 stops
SFO7:01 pmSan Francisco
$796
KLM
Nov 10
SFO11:51 amSan Francisco
19h 34m
2 stops
OPO3:25 pmPorto
Nov 17
OPO5:00 amPorto
19h 14m
2 stops
SFO4:14 pmSan Francisco
$838

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

Fri 11/27

7:15 pm-5:00 pm

1 stop13h 45m

Porto

Fri 12/4

11:40 am-2:45 pm

2 stops35h 05m

$654

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sat 1/16

4:45 pm-12:05 pm

1 stop35h 20m

Porto

Wed 2/10

11:55 am-2:50 pm

1 stop34h 55m

$674

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Fri 11/27

7:15 pm-7:30 am

1 stop28h 15m

Porto

Fri 12/4

11:40 am-2:45 pm

2 stops35h 05m

$682

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sat 1/9

4:45 pm-4:45 pm

1 stop16h 00m

Porto

Wed 2/17

11:55 am-2:50 pm

1 stop34h 55m

$690

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 4/11

7:35 pm-7:55 am

1 stop28h 20m

Porto

Thu 4/22

8:40 am-4:15 pm

1 stop15h 35m

$701

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 4/12

7:35 pm-7:55 am

1 stop28h 20m

Porto

Thu 4/22

8:40 am-4:15 pm

1 stop15h 35m

$701
Quickest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 4/13

8:05 pm-11:25 pm

1 stop19h 20m

Porto

Tue 4/20

6:20 am-6:15 pm

1 stop19h 55m

$704

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 4/6

8:00 am-6:30 pm

2 stops50h 30m

Porto

Fri 4/16

6:00 am-10:56 pm

2 stops24h 56m

$716

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 4/6

8:00 am-6:30 pm

2 stops50h 30m

Porto

Wed 4/14

6:00 am-8:31 pm

2 stops22h 31m

$716

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 4/7

8:05 pm-11:25 pm

1 stop19h 20m

Porto

Fri 4/16

6:00 am-12:29 am

2 stops26h 29m

$729

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 $878 to $1,081.
The lowest price recently found on this route was $654.

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 $938 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

$217

Fastest flight time

13h 45m

Direct flights

None
The best one-way flight to Porto from San Francisco in the past 72 hours is $217. The best round-trip flight deal from San Francisco to Porto found on momondo in the last 72 hours is $654.
The fastest flight from San Francisco to Porto takes 13h 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 13h 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
2,388 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $460Free CancellationRating
7.4
2,031 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
8,298 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,461 reviews
Search Turkish Airlines flights
SWISSPriceFrom $682Free CancellationRating
7.5
2,114 reviews
Search SWISS flights
KLMPriceFrom $683Free CancellationRating
7.8
1,595 reviews
Search KLM flights
United AirlinesPriceFrom $759Free CancellationRating
7.3
10,451 reviews
Search United Airlines flights
DeltaPriceFrom $764Free CancellationRating
7.8
8,692 reviews
Search Delta flights
Air FrancePriceFrom $855Free CancellationRating
7.5
1,653 reviews
Search Air France flights
Air CanadaPriceFrom $911Free CancellationRating
7.1
11,833 reviews
Search Air Canada flights

Traveling to a place near Porto?

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