Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from San Francisco to Porto from $305

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Porto departing on 5/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
4:40 pm - 4:55 pm
SFO
-
OPO
16h 15m1 stop
Scandinavian Airlines Logo
5:35 pm - 3:35 pm
OPO
-
SFO
29h 00m1 stop
$480Scandinavian Airlines
Thu, Mar 5 - Mon, Mar 9
TAP AIR PORTUGAL Logo
4:35 pm - 5:00 pm
SFO
-
OPO
16h 25m1 stop
TAP AIR PORTUGAL Logo
6:55 am - 2:35 pm
OPO
-
SFO
15h 40m1 stop
$521TAP AIR PORTUGAL
Mon, Feb 9 - Mon, Feb 23
TAP AIR PORTUGAL Logo
4:35 pm - 10:00 pm
SFO
-
OPO
21h 25m1 stop
TAP AIR PORTUGAL Logo
8:00 pm - 3:35 pm
OPO
-
SFO
26h 35m1 stop
$522TAP AIR PORTUGAL
Wed, Feb 25 - Sun, Mar 8
TAP AIR PORTUGAL Logo
8:20 pm - 7:00 pm
SFO
-
OPO
14h 40m1 stop
TAP AIR PORTUGAL Logo
9:00 am - 4:50 pm
OPO
-
SFO
15h 50m1 stop
$537TAP AIR PORTUGAL
Fri, Apr 10 - Fri, Apr 17
TAP AIR PORTUGAL Logo
5:35 pm - 3:05 pm
SFO
-
OPO
14h 30m1 stop
TAP AIR PORTUGAL Logo
6:55 am - 3:30 pm
OPO
-
SFO
15h 35m1 stop
$549TAP AIR PORTUGAL
Wed, Mar 11 - Wed, Mar 18
TAP AIR PORTUGAL Logo
8:10 pm - 11:00 am
SFO
-
OPO
31h 50m1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 3:45 pm
OPO
-
SFO
28h 45m1 stop
$553TAP AIR PORTUGAL
Fri, Mar 13 - Fri, Mar 20
Scandinavian Airlines Logo
4:40 pm - 4:55 pm
SFO
-
OPO
16h 15m1 stop
Scandinavian Airlines Logo
5:35 pm - 11:00 pm
OPO
-
SFO
36h 25m2 stops
$558Scandinavian Airlines
Thu, Mar 5 - Mon, Mar 9
Scandinavian Airlines Logo
4:45 pm - 11:00 am
SFO
-
OPO
34h 15m1 stop
Scandinavian Airlines Logo
11:50 am - 2:40 pm
OPO
-
SFO
34h 50m1 stop
$631Scandinavian Airlines
Mon, Apr 27 - Wed, May 13
Multiple Airlines Logo
8:45 pm - 10:10 am
SFO
-
OPO
29h 25m1 stop
Multiple Airlines Logo
6:00 am - 10:42 pm
OPO
-
SFO
48h 42m2 stops
$640Multiple Airlines
Sat, Apr 4 - Sun, Apr 12
Multiple Airlines Logo
7:40 pm - 10:05 pm
SFO
-
OPO
18h 25m1 stop
Multiple Airlines Logo
10:40 pm - 5:55 pm
OPO
-
SFO
27h 15m1 stop
$650Multiple Airlines
Thu, Apr 16 - Mon, Apr 20

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
Feb 23
SFO4:35 pmSan Francisco
17h 40m
1 stop
OPO6:15 pmPorto
Mar 2
OPO6:55 amPorto
15h 40m
1 stop
SFO2:35 pmSan Francisco
$521
Find similar
TAP AIR PORTUGAL
Feb 25
SFO4:35 pmSan Francisco
21h 25m
1 stop
OPO10:00 pmPorto
Mar 8
OPO8:00 pmPorto
26h 35m
1 stop
SFO3:35 pmSan Francisco
$522
Find similar
TAP AIR PORTUGAL
Apr 10
SFO8:20 pmSan Francisco
14h 40m
1 stop
OPO7:00 pmPorto
Apr 16
OPO9:00 amPorto
15h 35m
1 stop
SFO4:35 pmSan Francisco
$537
Find similar

Turkish Airlines flights from San Francisco to Porto

Our best Turkish Airlines deals on San Francisco to Porto flight tickets
Turkish Airlines
Feb 10
SFO6:50 pmSan Francisco
36h 20m
1 stop
OPO3:10 pmPorto
Feb 17
OPO4:10 pmPorto
32h 35m
1 stop
SFO4:45 pmSan Francisco
$662
Find similar
Turkish Airlines
May 12
SFO12:55 pmSan Francisco
36h 50m
1 stop
OPO9:45 amPorto
May 26
OPO4:40 pmPorto
32h 00m
1 stop
SFO4:40 pmSan Francisco
$664
Find similar
Turkish Airlines
Apr 22
SFO6:45 pmSan Francisco
36h 55m
1 stop
OPO3:40 pmPorto
May 4
OPO4:40 pmPorto
32h 00m
1 stop
SFO4:40 pmSan Francisco
$700
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 2, 2026.
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

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 3/5

4:40 pm-4:55 pm

1 stop16h 15m

Porto

Mon 3/9

5:35 pm-3:35 pm

1 stop29h 00m

$480

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 2/9

4:35 pm-5:00 pm

1 stop16h 25m

Porto

Mon 2/23

6:55 am-2:35 pm

1 stop15h 40m

$521

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 2/25

4:35 pm-10:00 pm

1 stop21h 25m

Porto

Sun 3/8

8:00 pm-3:35 pm

1 stop26h 35m

$522

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Fri 4/10

8:20 pm-7:00 pm

1 stop14h 40m

Porto

Fri 4/17

9:00 am-4:50 pm

1 stop15h 50m

$537

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 3/11

5:35 pm-3:05 pm

1 stop14h 30m

Porto

Wed 3/18

6:55 am-3:30 pm

1 stop15h 35m

$549

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Fri 3/13

8:10 pm-11:00 am

1 stop31h 50m

Porto

Fri 3/20

6:00 pm-3:45 pm

1 stop28h 45m

$553

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 3/5

4:40 pm-4:55 pm

1 stop16h 15m

Porto

Mon 3/9

5:35 pm-11:00 pm

2 stops36h 25m

$558

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 4/27

4:45 pm-11:00 am

1 stop34h 15m

Porto

Wed 5/13

11:50 am-2:40 pm

1 stop34h 50m

$631

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 4/4

8:45 pm-10:10 am

1 stop29h 25m

Porto

Sun 4/12

6:00 am-10:42 pm

2 stops48h 42m

$640

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 4/16

7:40 pm-10:05 pm

1 stop18h 25m

Porto

Mon 4/20

10:40 pm-5:55 pm

1 stop27h 15m

$650

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 cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from San Francisco, with most prices found around $671. If you aren’t able to travel during the month of January, then book flights to Porto from San Francisco during November instead. Flights to Porto in November, while not as cheap as those in January, still average around $731.

How far in advance should I book a flight 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 $904 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 $724 on momondo.

How have San Francisco to Porto flight prices changed over time?

As of January 2026, prices for San Francisco to Porto flights are approximately 83% 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

Fastest flight time

14h 20m

Direct flights

None
The fastest flight from San Francisco to Porto takes 14h 20m
There are no direct flights from San Francisco to Porto. There are no popular flight routes from San Francisco to Porto.
Search flight deals

  • How far is San Francisco to Porto by plane?

    Porto is 5565.0 mi away from San Francisco. Typically, this will take 14h 20m 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
Scandinavian AirlinesPriceFrom $527Free CancellationRating
7.4
1,629 reviews
Search Scandinavian Airlines flights
TAP AIR PORTUGALPriceFrom $574Free CancellationRating
7.1
2,104 reviews
Search TAP AIR PORTUGAL flights
LufthansaPriceFrom $625Free CancellationRating
6.8
7,676 reviews
Search Lufthansa flights
SWISSPriceFrom $626Free CancellationRating
7.5
1,834 reviews
Search SWISS flights
DeltaPriceFrom $661Free CancellationRating
7.9
8,023 reviews
Search Delta flights
KLMPriceFrom $673Free CancellationRating
7.7
1,435 reviews
Search KLM flights
IberiaPriceFrom $685Free CancellationRating
7.0
3,058 reviews
Search Iberia flights
United AirlinesPriceFrom $694Free CancellationRating
7.4
9,129 reviews
Search United Airlines flights
VuelingPriceFrom $756Free CancellationRating
7.1
1,221 reviews
Search Vueling flights
Air CanadaPriceFrom $776Free CancellationRating
7.1
10,577 reviews
Search Air Canada 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
Braga
Matosinhos
Aveiro
Guimarães
Esposende
Lamego
Chaves
Viseu
Espinho
Arcos de Valdevez
Pinhao
Ponte de Lima
Curia
Penafiel
Mesao Frio
Mira
Baiao

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 2/1
Sun 2/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal