Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from San Francisco to Porto from $255

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 4/19. 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
4:45 pm - 11:00 am
SFO
-
OPO
34h 15m
1 stop
Scandinavian Airlines Logo
9:30 am - 2:40 pm
OPO
-
SFO
37h 10m
1 stop
$486Scandinavian Airlines
Mon, Apr 27 - Sat, May 9
Scandinavian Airlines Logo
5:40 pm - 4:45 pm
SFO
-
OPO
16h 05m
1 stop
Scandinavian Airlines Logo
5:35 pm - 3:35 pm
OPO
-
SFO
29h 00m
1 stop
$494Scandinavian Airlines
Sun, Mar 8 - Mon, Mar 23
Scandinavian Airlines Logo
5:40 pm - 4:45 pm
SFO
-
OPO
16h 05m
1 stop
Scandinavian Airlines Logo
5:35 pm - 3:35 pm
OPO
-
SFO
29h 00m
1 stop
$496Scandinavian Airlines
Sun, Mar 8 - Mon, Mar 23
Scandinavian Airlines Logo
4:45 pm - 11:00 am
SFO
-
OPO
34h 15m
1 stop
Scandinavian Airlines Logo
11:50 am - 2:40 pm
OPO
-
SFO
34h 50m
1 stop
$516Scandinavian Airlines
Mon, Apr 13 - Wed, Apr 22
Scandinavian Airlines Logo
5:40 pm - 4:45 pm
SFO
-
OPO
16h 05m
1 stop
Scandinavian Airlines Logo
5:35 pm - 3:35 pm
OPO
-
SFO
29h 00m
1 stop
$544Scandinavian Airlines
Sun, Mar 8 - Mon, Mar 23
Scandinavian Airlines Logo
4:45 pm - 11:00 am
SFO
-
OPO
34h 15m
1 stop
Scandinavian Airlines Logo
9:30 am - 2:40 pm
OPO
-
SFO
37h 10m
1 stop
$548Scandinavian Airlines
Sat, Apr 18 - Sat, May 9
Scandinavian Airlines Logo
4:45 pm - 11:00 am
SFO
-
OPO
34h 15m
1 stop
Scandinavian Airlines Logo
6:20 pm - 2:40 pm
OPO
-
SFO
28h 20m
1 stop
$556Scandinavian Airlines
Sat, Apr 18 - Sun, May 3
Scandinavian Airlines Logo
4:45 pm - 11:00 am
SFO
-
OPO
34h 15m
1 stop
Scandinavian Airlines Logo
9:30 am - 2:40 pm
OPO
-
SFO
37h 10m
1 stop
$561Scandinavian Airlines
Sat, Apr 18 - Sat, May 9
Scandinavian Airlines Logo
5:40 pm - 9:35 am
SFO
-
OPO
32h 55m
1 stop
Scandinavian Airlines Logo
5:35 pm - 3:35 pm
OPO
-
SFO
29h 00m
1 stop
$563Scandinavian Airlines
Mon, Mar 16 - Mon, Mar 23
TAP AIR PORTUGAL Logo
4:35 pm - 3:00 pm
SFO
-
OPO
14h 25m
1 stop
TAP AIR PORTUGAL Logo
6:55 am - 2:35 pm
OPO
-
SFO
15h 40m
1 stop
$576TAP AIR PORTUGAL
Mon, Feb 23 - Mon, Mar 2

Scandinavian Airlines flights from San Francisco to Porto

Our best Scandinavian Airlines deals on San Francisco to Porto flight tickets
Scandinavian Airlines
Apr 27
SFO4:45 pmSan Francisco
34h 15m
1 stop
OPO11:00 amPorto
May 9
OPO9:30 amPorto
37h 10m
1 stop
SFO2:40 pmSan Francisco
$486
Scandinavian Airlines
Mar 8
SFO5:40 pmSan Francisco
16h 05m
1 stop
OPO4:45 pmPorto
Mar 23
OPO5:35 pmPorto
29h 00m
1 stop
SFO3:35 pmSan Francisco
$496
Scandinavian Airlines
Mar 8
SFO5:40 pmSan Francisco
16h 05m
1 stop
OPO4:45 pmPorto
Mar 23
OPO5:35 pmPorto
29h 00m
1 stop
SFO3:35 pmSan Francisco
$544

Turkish Airlines flights from San Francisco to Porto

Our best Turkish Airlines deals on San Francisco to Porto flight tickets
Turkish Airlines
Apr 14
SFO6:45 pmSan Francisco
20h 45m
1 stop
OPO11:30 pmPorto
Apr 28
OPO4:40 pmPorto
32h 00m
1 stop
SFO4:40 pmSan Francisco
$644
Turkish Airlines
Apr 14
SFO12:55 pmSan Francisco
36h 50m
1 stop
OPO9:45 amPorto
Apr 28
OPO4:40 pmPorto
32h 00m
1 stop
SFO4:40 pmSan Francisco
$645
Turkish Airlines
Mar 23
SFO7:50 pmSan Francisco
31h 05m
1 stop
OPO9:55 amPorto
Apr 2
OPO6:10 amPorto
36h 40m
1 stop
SFO10:50 amSan Francisco
$662

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 February 17, 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

Mon 4/27

4:45 pm-11:00 am

1 stop34h 15m

Porto

Sat 5/9

9:30 am-2:40 pm

1 stop37h 10m

$486

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 3/8

5:40 pm-4:45 pm

1 stop16h 05m

Porto

Mon 3/23

5:35 pm-3:35 pm

1 stop29h 00m

$494

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 3/8

5:40 pm-4:45 pm

1 stop16h 05m

Porto

Mon 3/23

5:35 pm-3:35 pm

1 stop29h 00m

$496

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 4/13

4:45 pm-11:00 am

1 stop34h 15m

Porto

Wed 4/22

11:50 am-2:40 pm

1 stop34h 50m

$516

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 3/8

5:40 pm-4:45 pm

1 stop16h 05m

Porto

Mon 3/23

5:35 pm-3:35 pm

1 stop29h 00m

$544

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 4/18

4:45 pm-11:00 am

1 stop34h 15m

Porto

Sat 5/9

9:30 am-2:40 pm

1 stop37h 10m

$548

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 4/18

4:45 pm-11:00 am

1 stop34h 15m

Porto

Sun 5/3

6:20 pm-2:40 pm

1 stop28h 20m

$556

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 4/18

4:45 pm-11:00 am

1 stop34h 15m

Porto

Sat 5/9

9:30 am-2:40 pm

1 stop37h 10m

$561

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 3/16

5:40 pm-9:35 am

1 stop32h 55m

Porto

Mon 3/23

5:35 pm-3:35 pm

1 stop29h 00m

$563

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 2/23

4:35 pm-3:00 pm

1 stop14h 25m

Porto

Mon 3/2

6:55 am-2:35 pm

1 stop15h 40m

$576

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 February is, on average, the cheapest month to fly to Porto from San Francisco, with most prices found around $676. If you aren’t able to travel during the month of February, then book flights to Porto from San Francisco during November instead. Flights to Porto in November, while not as cheap as those in February, 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 $903 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 $689 on momondo.

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

As of February 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

Fastest flight time

14h 25m

Direct flights

None
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

  • 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
7.1
2,143 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.3
1,686 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
7,787 reviews
Search Lufthansa flights
SWISSPriceFrom $626Free CancellationRating
7.6
1,876 reviews
Search SWISS flights
IberiaPriceFrom $660Free CancellationRating
7.0
3,117 reviews
Search Iberia flights
DeltaPriceFrom $661Free CancellationRating
7.9
8,205 reviews
Search Delta flights
KLMPriceFrom $673Free CancellationRating
7.7
1,456 reviews
Search KLM flights
United AirlinesPriceFrom $675Free CancellationRating
7.4
9,311 reviews
Search United Airlines flights
Air CanadaPriceFrom $776Free CancellationRating
7.1
10,730 reviews
Search Air Canada flights
American AirlinesPriceFrom $1,000Free CancellationRating
7.2
11,296 reviews
Search American Airlines 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
Matosinhos
Braga
Aveiro
Esposende
Lamego
Guimarães
Pinhao
Chaves
Espinho
Arcos de Valdevez
Viseu
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
Thu 3/19
Thu 3/26
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal