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Cheap flights from San Francisco to Porto from $314

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
12:00 pm - 2:50 pmOPO  Porto-SFO San Francisco
34h 50m1 stop Kastrup Copenhagen
$629Scandinavian Airlines
Sat, Nov 14 - Sat, Nov 21
Scandinavian Airlines Logo
4:45 pm - 5:00 pmSFO  San Francisco-OPO Porto
16h 15m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
11:55 am - 2:50 pmOPO  Porto-SFO San Francisco
34h 55m1 stop Kastrup Copenhagen
$637Scandinavian Airlines
Wed, Nov 18 - Mon, Nov 30
Multiple Airlines Logo
4:40 pm - 12:50 pmSFO  San Francisco-OPO Porto
36h 10m2 stops Toronto Pearson Intl Munich Franz Josef Strauss
Multiple Airlines Logo
6:00 am - 4:06 pmOPO  Porto-SFO San Francisco
18h 06m2 stops Frankfurt am Main Vancouver Intl
$730Multiple Airlines
Sat, Nov 28 - Wed, Dec 9
Multiple Airlines Logo
11:29 pm - 12:50 pmSFO  San Francisco-OPO Porto
29h 21m2 stops Toronto Pearson Intl Munich Franz Josef Strauss
Multiple Airlines Logo
7:20 pm - 4:30 pmOPO  Porto-SFO San Francisco
29h 10m1 stop Zurich
$732Multiple Airlines
Sat, Nov 28 - Wed, Dec 9
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
United Airlines Logo
11:20 pm - 9:30 amSFO  San Francisco-OPO Porto
26h 10m2 stops Washington, D.C. Dulles Intl Newark
United Airlines Logo
12:35 pm - 8:10 pmOPO  Porto-SFO San Francisco
15h 35m1 stop Frankfurt am Main
$746United Airlines
Mon, Dec 7 - Fri, Dec 11
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
$784SWISS
Mon, Nov 9 - Tue, Nov 17
TAP AIR PORTUGAL Logo
4:30 pm - 5:00 pmSFO  San Francisco-OPO Porto
16h 30m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
9:15 pm - 1:35 pmOPO  Porto-SFO San Francisco
24h 20m1 stop Lisbon Humberto Delgado
$788TAP AIR PORTUGAL
Thu, Sep 24 - Mon, Sep 28
TAP AIR PORTUGAL Logo
4:35 pm - 5:05 pmSFO  San Francisco-OPO Porto
16h 30m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
10:30 pm - 2:30 pmOPO  Porto-SFO San Francisco
24h 00m1 stop Lisbon Humberto Delgado
$788TAP AIR PORTUGAL
Wed, Oct 7 - Wed, Oct 14
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
$792SWISS
Sun, Oct 18 - Tue, Nov 3

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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 1
SFO4:30 pmSan Francisco
18h 25m
1 stop
OPO6:55 pmPorto
Oct 19
OPO9:15 pmPorto
24h 20m
1 stop
SFO1:35 pmSan Francisco
$788
TAP AIR PORTUGAL
Nov 11
SFO4:35 pmSan Francisco
14h 25m
1 stop
OPO3:00 pmPorto
Nov 15
OPO6:00 pmPorto
28h 45m
1 stop
SFO2:45 pmSan Francisco
$801
TAP AIR PORTUGAL
Oct 15
SFO4:30 pmSan Francisco
33h 30m
1 stop
OPO10:00 amPorto
Oct 21
OPO6:00 pmPorto
28h 30m
1 stop
SFO2:30 pmSan Francisco
$814

Delta flights from San Francisco to Porto

Our best Delta deals on San Francisco to Porto flight tickets
Delta
Sep 22
SFO11:37 amSan Francisco
19h 48m
2 stops
OPO3:25 pmPorto
Sep 29
OPO5:00 amPorto
14h 45m
1 stop
SFO11:45 amSan Francisco
$842
Delta
Sep 22
SFO11:35 amSan Francisco
19h 50m
2 stops
OPO3:25 pmPorto
Sep 29
OPO5:00 amPorto
21h 09m
2 stops
SFO6:09 pmSan Francisco
$852
Delta
Sep 2
SFO7:00 amSan Francisco
19h 40m
2 stops
OPO10:40 amPorto
Sep 14
OPO11:25 amPorto
20h 57m
2 stops
SFO12:22 amSan Francisco
$1,124

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 11/14

4:45 pm-4:45 pm

1 stop16h 00m

Porto

Sat 11/21

12:00 pm-2:50 pm

1 stop34h 50m

$629

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 11/18

4:45 pm-5:00 pm

1 stop16h 15m

Porto

Mon 11/30

11:55 am-2:50 pm

1 stop34h 55m

$637

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sat 11/28

4:40 pm-12:50 pm

2 stops36h 10m

Porto

Wed 12/9

6:00 am-4:06 pm

2 stops18h 06m

$730

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sat 11/28

11:29 pm-12:50 pm

2 stops29h 21m

Porto

Wed 12/9

7:20 pm-4:30 pm

1 stop29h 10m

$732
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

Mon 12/7

11:20 pm-9:30 am

2 stops26h 10m

Porto

Fri 12/11

12:35 pm-8:10 pm

1 stop15h 35m

$746

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 11/9

7:25 pm-11:15 am

1 stop31h 50m

Porto

Tue 11/17

12:05 pm-4:30 pm

1 stop36h 25m

$784

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Thu 9/24

4:30 pm-5:00 pm

1 stop16h 30m

Porto

Mon 9/28

9:15 pm-1:35 pm

1 stop24h 20m

$788

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 10/7

4:35 pm-5:05 pm

1 stop16h 30m

Porto

Wed 10/14

10:30 pm-2:30 pm

1 stop24h 00m

$788

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

$792

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 $936 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 August 2026, prices for San Francisco to Porto flights are approximately 23% 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

$314

Fastest flight time

16h 35m

Direct flights

None
The best one-way flight to Porto from San Francisco in the past 72 hours is $314. 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 16h 35m
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 16h 35m 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
2,377 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.4
1,964 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
8,225 reviews
Search Lufthansa flights
SWISSPriceFrom $643Free CancellationRating
7.5
2,058 reviews
Search SWISS flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,485 reviews
Search Turkish Airlines flights
DeltaPriceFrom $661Free CancellationRating
7.8
8,532 reviews
Search Delta flights
United AirlinesPriceFrom $664Free CancellationRating
7.4
10,134 reviews
Search United Airlines flights
KLMPriceFrom $683Free CancellationRating
7.8
1,566 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
Vila Nova de Gaia
Coimbra
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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