Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from San Francisco to Porto from $351

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 11/22. 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
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
5:45 pm - 5:00 pm
SFO
-
OPO
16h 15m
1 stop
Scandinavian Airlines Logo
11:55 am - 2:50 pm
OPO
-
SFO
34h 55m
1 stop
$628Scandinavian Airlines
Wed, Oct 28 - Wed, Nov 4
Multiple Airlines Logo
4:30 pm - 9:55 pm
SFO
-
OPO
21h 25m
2 stops
Multiple Airlines Logo
10:40 pm - 2:30 pm
OPO
-
SFO
23h 50m
2 stops
$703Multiple Airlines
Sun, Aug 9 - Mon, Aug 17
Multiple Airlines Logo
4:30 pm - 10:50 am
SFO
-
OPO
34h 20m
3 stops
Multiple Airlines Logo
10:00 pm - 2:30 pm
OPO
-
SFO
24h 30m
2 stops
$726Multiple Airlines
Mon, Aug 17 - Wed, Sep 2
Scandinavian Airlines Logo
5:45 pm - 5:00 pm
SFO
-
OPO
16h 15m
1 stop
Scandinavian Airlines Logo
11:55 am - 9:32 pm
OPO
-
SFO
41h 37m
2 stops
$730Scandinavian Airlines
Wed, Oct 28 - Wed, Nov 4
Scandinavian Airlines Logo
4:45 pm - 10:40 am
SFO
-
OPO
33h 55m
2 stops
Scandinavian Airlines Logo
11:55 am - 3:50 pm
OPO
-
SFO
34h 55m
1 stop
$733Scandinavian Airlines
Wed, Oct 14 - Wed, Oct 28
Multiple Airlines Logo
4:45 pm - 8:00 am
SFO
-
OPO
31h 15m
3 stops
Multiple Airlines Logo
10:55 am - 2:40 pm
OPO
-
SFO
35h 45m
2 stops
$738Multiple Airlines
Mon, Sep 21 - Mon, Sep 28
Multiple Airlines Logo
4:45 pm - 11:55 pm
SFO
-
OPO
23h 10m
2 stops
Multiple Airlines Logo
10:55 am - 2:40 pm
OPO
-
SFO
35h 45m
2 stops
$746Multiple Airlines
Mon, Sep 21 - Mon, Sep 28
Lufthansa Logo
9:05 pm - 11:25 pm
SFO
-
OPO
18h 20m
1 stop
Lufthansa Logo
6:20 am - 7:00 pm
OPO
-
SFO
20h 40m
1 stop
$748Lufthansa
Tue, Oct 13 - Tue, Oct 20
Delta Logo
6:00 am - 10:35 am
SFO
-
OPO
21h 35m
2 stops
Delta Logo
5:00 am - 5:13 pm
OPO
-
SFO
20h 13m
2 stops
$756Delta
Wed, Oct 28 - Wed, Nov 4
Air Canada Logo
5:00 am - 7:00 am
SFO
-
OPO
18h 00m
2 stops
Air Canada Logo
6:00 am - 6:41 pm
OPO
-
SFO
20h 41m
2 stops
$757Air Canada
Tue, Oct 13 - Tue, Oct 20

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

SWISS flights from San Francisco to Porto

Our best SWISS deals on San Francisco to Porto flight tickets
SWISS
Aug 3
SFO7:35 pmSan Francisco
28h 20m
1 stop
OPO7:55 amPorto
Aug 19
OPO6:45 pmPorto
29h 30m
1 stop
SFO4:15 pmSan Francisco
$830
SWISS
Jul 6
SFO7:35 pmSan Francisco
31h 50m
1 stop
OPO11:25 amPorto
Jul 12
OPO3:00 amPorto
21h 15m
1 stop
SFO4:15 pmSan Francisco
$1,045

Delta flights from San Francisco to Porto

Our best Delta deals on San Francisco to Porto flight tickets
Delta
Sep 29
SFO9:00 amSan Francisco
17h 30m
1 stop
OPO10:30 amPorto
Oct 6
OPO11:35 amPorto
32h 10m
1 stop
SFO11:45 amSan Francisco
$777
Delta
Sep 30
SFO1:15 pmSan Francisco
18h 10m
2 stops
OPO3:25 pmPorto
Oct 9
OPO5:00 amPorto
14h 45m
1 stop
SFO11:45 amSan Francisco
$780
Delta
Sep 30
SFO11:37 amSan Francisco
19h 48m
2 stops
OPO3:25 pmPorto
Oct 28
OPO5:00 amPorto
19h 05m
2 stops
SFO5:05 pmSan Francisco
$790

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 July 3, 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

Cheapest round-trip

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 10/28

5:45 pm-5:00 pm

1 stop16h 15m

Porto

Wed 11/4

11:55 am-2:50 pm

1 stop34h 55m

$628

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 8/9

4:30 pm-9:55 pm

2 stops21h 25m

Porto

Mon 8/17

10:40 pm-2:30 pm

2 stops23h 50m

$703

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 8/17

4:30 pm-10:50 am

3 stops34h 20m

Porto

Wed 9/2

10:00 pm-2:30 pm

2 stops24h 30m

$726

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 10/28

5:45 pm-5:00 pm

1 stop16h 15m

Porto

Wed 11/4

11:55 am-9:32 pm

2 stops41h 37m

$730

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 10/14

4:45 pm-10:40 am

2 stops33h 55m

Porto

Wed 10/28

11:55 am-3:50 pm

1 stop34h 55m

$733

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 9/21

4:45 pm-8:00 am

3 stops31h 15m

Porto

Mon 9/28

10:55 am-2:40 pm

2 stops35h 45m

$738

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 9/21

4:45 pm-11:55 pm

2 stops23h 10m

Porto

Mon 9/28

10:55 am-2:40 pm

2 stops35h 45m

$746

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 10/13

9:05 pm-11:25 pm

1 stop18h 20m

Porto

Tue 10/20

6:20 am-7:00 pm

1 stop20h 40m

$748

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 10/28

6:00 am-10:35 am

2 stops21h 35m

Porto

Wed 11/4

5:00 am-5:13 pm

2 stops20h 13m

$756
Quickest round-trip

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 10/13

5:00 am-7:00 am

2 stops18h 00m

Porto

Tue 10/20

6:00 am-6:41 pm

2 stops20h 41m

$757

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?

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 $588. If you aren’t able to travel during the month of February, then book flights to Porto from San Francisco during March instead. Flights to Porto in March, while not as cheap as those in February, still average around $609.

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 $894 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 $747 on momondo.

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

As of July 2026, prices for San Francisco to Porto flights are approximately 9% cheaper 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

16h 15m

Direct flights

None
The fastest flight from San Francisco to Porto takes 16h 15m
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 15m 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
2,311 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.4
1,862 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
8,108 reviews
Search Lufthansa flights
SWISSPriceFrom $643Free CancellationRating
7.5
1,986 reviews
Search SWISS flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,438 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $675Free CancellationRating
7.4
9,927 reviews
Search United Airlines flights
IberiaPriceFrom $676Free CancellationRating
7.0
3,250 reviews
Search Iberia flights
KLMPriceFrom $683Free CancellationRating
7.8
1,532 reviews
Search KLM flights
DeltaPriceFrom $778Free CancellationRating
7.8
8,453 reviews
Search Delta flights
Air CanadaPriceFrom $787Free CancellationRating
7.1
11,291 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
Aveiro
Matosinhos
Esposende
Lamego
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Ponte de Lima
Viseu
Curia
Mesao Frio
Penafiel
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 8/2
Sun 8/9
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal