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Cheap flights from San Francisco to Porto from $324

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 - 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
$579Scandinavian Airlines
Mon, Mar 1 - Wed, Mar 10
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
$580Scandinavian Airlines
Mon, Mar 1 - Wed, Mar 10
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
$680SWISS
Mon, Mar 1 - Mon, Mar 8
Multiple Airlines Logo
7:25 pm - 11:15 amSFO  San Francisco-OPO Porto
31h 50m1 stop Zurich
Multiple Airlines Logo
6:15 am - 7:35 pmOPO  Porto-SFO San Francisco
21h 20m1 stop Munich Franz Josef Strauss
$697Multiple Airlines
Sun, Feb 14 - Fri, Feb 19
Multiple Airlines Logo
7:25 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
$698Multiple Airlines
Sun, Feb 28 - Fri, Mar 5
Lufthansa Logo
8:05 pm - 11:25 pmSFO  San Francisco-OPO Porto
19h 20m1 stop Munich Franz Josef Strauss
Lufthansa Logo
11:05 am - 6:15 pmOPO  Porto-SFO San Francisco
15h 10m1 stop Munich Franz Josef Strauss
$701Lufthansa
Tue, Apr 20 - Tue, Apr 27
United Airlines Logo
7:30 am - 9:45 amSFO  San Francisco-OPO Porto
18h 15m1 stop Newark
United Airlines Logo
6:00 am - 7:55 pmOPO  Porto-SFO San Francisco
21h 55m1 stop Frankfurt am Main
$721United Airlines
Wed, Apr 7 - Tue, Apr 20
United Airlines Logo
6:30 am - 9:45 amSFO  San Francisco-OPO Porto
19h 15m1 stop Newark
United Airlines Logo
6:00 am - 7:55 pmOPO  Porto-SFO San Francisco
21h 55m1 stop Frankfurt am Main
$721United Airlines
Tue, Apr 13 - Tue, Apr 20
SWISS Logo
7:35 pm - 11:20 amSFO  San Francisco-OPO Porto
31h 45m1 stop Zurich
SWISS Logo
12:10 pm - 4:15 pmOPO  Porto-SFO San Francisco
36h 05m1 stop Zurich
$728SWISS
Mon, Apr 12 - Tue, Apr 20
Lufthansa Logo
2:45 pm - 10:25 pmSFO  San Francisco-OPO Porto
23h 40m1 stop Frankfurt am Main
Lufthansa Logo
6:15 am - 7:35 pmOPO  Porto-SFO San Francisco
21h 20m1 stop Munich Franz Josef Strauss
$756Lufthansa
Fri, Feb 12 - Fri, Feb 19

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Lufthansa flights from San Francisco to Porto

Our best Lufthansa deals on San Francisco to Porto flight tickets
Lufthansa
Apr 20
SFO8:05 pmSan Francisco
19h 20m
1 stop
OPO11:25 pmPorto
Apr 27
OPO11:05 amPorto
15h 10m
1 stop
SFO6:15 pmSan Francisco
$701
Lufthansa
Feb 12
SFO2:45 pmSan Francisco
23h 40m
1 stop
OPO10:25 pmPorto
Feb 19
OPO6:15 amPorto
21h 20m
1 stop
SFO7:35 pmSan Francisco
$756
Lufthansa
Nov 22
SFO10:50 pmSan Francisco
26h 40m
1 stop
OPO9:30 amPorto
Nov 27
OPO6:15 amPorto
21h 20m
1 stop
SFO7:35 pmSan Francisco
$1,343

United Airlines flights from San Francisco to Porto

Our best United Airlines deals on San Francisco to Porto flight tickets
United Airlines
Apr 7
SFO7:30 amSan Francisco
18h 15m
1 stop
OPO9:45 amPorto
Apr 20
OPO6:00 amPorto
21h 55m
1 stop
SFO7:55 pmSan Francisco
$721
United Airlines
Mar 1
SFO7:00 amSan Francisco
18h 30m
1 stop
OPO9:30 amPorto
Mar 9
OPO12:35 pmPorto
15h 35m
1 stop
SFO8:10 pmSan Francisco
$722
United Airlines
Feb 28
SFO6:35 amSan Francisco
18h 55m
2 stops
OPO9:30 amPorto
Mar 9
OPO12:35 pmPorto
15h 35m
1 stop
SFO8:10 pmSan Francisco
$726

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

Mon 3/1

4:45 pm-11:05 am

1 stop34h 20m

Porto

Wed 3/10

11:55 am-2:50 pm

1 stop34h 55m

$579

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 3/1

4:45 pm-11:05 am

1 stop34h 20m

Porto

Wed 3/10

11:55 am-2:50 pm

1 stop34h 55m

$580

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 3/1

7:25 pm-11:15 am

1 stop31h 50m

Porto

Mon 3/8

12:05 pm-4:30 pm

1 stop36h 25m

$680

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 2/14

7:25 pm-11:15 am

1 stop31h 50m

Porto

Fri 2/19

6:15 am-7:35 pm

1 stop21h 20m

$697

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 2/28

7:25 pm-6:30 pm

1 stop15h 05m

Porto

Fri 3/5

6:15 am-7:35 pm

1 stop21h 20m

$698
Quickest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 4/20

8:05 pm-11:25 pm

1 stop19h 20m

Porto

Tue 4/27

11:05 am-6:15 pm

1 stop15h 10m

$701

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 4/7

7:30 am-9:45 am

1 stop18h 15m

Porto

Tue 4/20

6:00 am-7:55 pm

1 stop21h 55m

$721

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 4/13

6:30 am-9:45 am

1 stop19h 15m

Porto

Tue 4/20

6:00 am-7:55 pm

1 stop21h 55m

$721

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 4/12

7:35 pm-11:20 am

1 stop31h 45m

Porto

Tue 4/20

12:10 pm-4:15 pm

1 stop36h 05m

$728

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Fri 2/12

2:45 pm-10:25 pm

1 stop23h 40m

Porto

Fri 2/19

6:15 am-7:35 pm

1 stop21h 20m

$756

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 $819 to $1,163.
The lowest price recently found on this route was $579.

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 $952 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 November 2026, prices for San Francisco to Porto flights are approximately 40% 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

$324

Fastest flight time

14h 25m

Direct flights

None
The best one-way flight to Porto from San Francisco in the past 72 hours is $324. The best round-trip flight deal from San Francisco to Porto found on momondo in the last 72 hours is $579.
The fastest flight from San Francisco to Porto takes 14h 25m
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 25m 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
2,396 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $460Free CancellationRating
7.5
2,034 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
8,295 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,466 reviews
Search Turkish Airlines flights
SWISSPriceFrom $682Free CancellationRating
7.5
2,119 reviews
Search SWISS flights
KLMPriceFrom $683Free CancellationRating
7.8
1,597 reviews
Search KLM flights
United AirlinesPriceFrom $759Free CancellationRating
7.3
10,495 reviews
Search United Airlines flights
DeltaPriceFrom $764Free CancellationRating
7.8
8,716 reviews
Search Delta flights
Air FrancePriceFrom $855Free CancellationRating
7.5
1,650 reviews
Search Air France flights
Air CanadaPriceFrom $911Free CancellationRating
7.1
11,897 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
Esposende
Matosinhos
Chaves
Viseu
Espinho
Arcos de Valdevez
Lamego
Guimarães
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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