How long is the flight from San Francisco to Porto?

There are many flights that can get you from San Francisco to Porto in 31h 05m. Fly via Scandinavian Airlines or Turkish Airlines to get the fastest option. San Francisco and Porto are separated by a distance of 5566 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from San Francisco to Porto round-trip?

Iberia, at $520, was found to be the cheapest airline from San Francisco to Porto.Alternate airlines to your destination round-trip include Scandinavian Airlines and TAP AIR PORTUGAL. Users have found that Iberia is 42% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from San Francisco to Porto one-way?

The cheapest airlines for a one-way flight from San Francisco to Porto are Iberia ($317), TAP AIR PORTUGAL ($383), and United Airlines ($408).

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

What are the most popular airlines that fly from San Francisco to Porto?

When booking a flight from San Francisco to Porto, you may want to consider flying on TAP AIR PORTUGAL, United Airlines or SWISS as they are the most popular for this route.

Where are the most common layover locations when flying from San Francisco to Porto?

Of the flights from San Francisco to Porto that have layovers, most of them stop in Frankfurt am Main.

Where are the least popular layover locations for San Francisco to Porto flights?

Of the flights from San Francisco to Porto that have layovers, the fewest flights stop in Lisbon.

What are some popular things to do or see while on a layover in Frankfurt am Main?

The majority of Frankfurt am Main visitors spend their time at Römerberg, Festhalle, and Historisches Museum Frankfurt. Travelers on a layover in Frankfurt am Main can visit Römerberg, Festhalle, and Historisches Museum Frankfurt, by traveling 7.4 mi, 6.5 mi, and 7.3 mi, respectively after landing at Frankfurt am Main. Travelers can book a car rental at Frankfurt am Main for about $42 per day to make their sightseeing more efficient.

Most accurate provider : When it comes to deals on San Francisco-Porto flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Francisco-Porto flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Francisco-Porto flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on San Francisco-Porto flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Francisco-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from San Francisco to Porto that include hotel bookings?

Yes. In addition to deals on San Francisco to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from San Francisco to Porto?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Porto.

Can I find deals for business class flights from San Francisco to Porto?

Yes. Cheapflights offers flight deals from San Francisco to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$300+ Flights from San Francisco to Porto

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheapflights Tip: The best prices from San Francisco to Porto are usually found in January or November, booked 89 days in advance, depart on a Thursday or Monday and return on a Wednesday

Cheap flight deals from San Francisco to Porto

Cheapest flights from San Francisco to Porto
Explore the most affordable flight options available from San Francisco to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 14, 2025.

Sun 12/286:20 pmSFO - OPO

1 stop33h 45mMultiple Airlines

Tue 12/308:00 pmOPO - SFO

1 stop26h 30mMultiple Airlines

Deal found 12/13

$1,501

Thu 12/254:40 pmSFO - OPO

1 stop21h 40mMultiple Airlines

Tue 12/308:00 pmOPO - SFO

1 stop26h 30mMultiple Airlines

Deal found 12/13

$1,568

Fri 12/265:20 pmSFO - OPO

1 stop18h 15mMultiple Airlines

Tue 12/308:00 pmOPO - SFO

1 stop26h 30mMultiple Airlines

Deal found 12/13

$1,605

Sun 12/281:30 pmSFO - OPO

1 stop15h 20mLufthansa

Tue 12/3012:30 pmOPO - SFO

2 stops34h 20mLufthansa

Deal found 12/13

$1,611

Sat 12/277:25 pmSFO - OPO

1 stop15h 10mMultiple Airlines

Tue 12/308:00 pmOPO - SFO

1 stop26h 30mMultiple Airlines

Deal found 12/13

$1,626

Sat 12/2711:15 pmSFO - OPO

2 stops32h 00mLufthansa

Tue 12/3012:30 pmOPO - SFO

2 stops34h 20mLufthansa

Deal found 12/13

$1,633

Sun 12/288:25 amSFO - OPO

2 stops20h 25mLufthansa

Wed 12/316:00 amOPO - SFO

2 stops23h 20mLufthansa

Deal found 12/13

$1,638

Thu 12/254:40 pmSFO - OPO

1 stop16h 15mScandinavian Airlines

Wed 12/314:10 pmOPO - SFO

2 stops30h 25mScandinavian Airlines

Deal found 12/13

$1,643

Sat 12/2711:15 pmSFO - OPO

2 stops32h 00mLufthansa

Wed 12/316:00 amOPO - SFO

2 stops23h 20mLufthansa

Deal found 12/13

$1,658

Best flights from San Francisco to Porto
Discover carefully curated flight deals from San Francisco to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 14, 2025.

Wed 3/111:05 pmSFO - OPO

2 stops44h 50mScandinavian Airlines

Wed 3/1810:25 amOPO - SFO

1 stop36h 10mScandinavian Airlines

Deal found 12/14

$590

Wed 1/286:50 pmSFO - OPO

1 stop31h 05mTurkish Airlines

Wed 2/44:10 pmOPO - SFO

1 stop32h 35mTurkish Airlines

Deal found 12/13

$661

Wed 1/284:35 pmSFO - OPO

2 stops21h 55mMultiple Airlines

Wed 2/48:45 amOPO - SFO

1 stop19h 25mMultiple Airlines

Deal found 12/13

$752

Sun 2/226:45 amSFO - OPO

2 stops18h 45mUnited Airlines

Tue 3/312:30 pmOPO - SFO

1 stop15h 40mUnited Airlines

Deal found 12/12

$779

Thu 4/304:45 pmSFO - OPO

1 stop31h 55mScandinavian Airlines

Sat 5/99:30 amOPO - SFO

1 stop37h 10mScandinavian Airlines

Deal found 12/13

$649

Wed 4/296:50 pmSFO - OPO

1 stop30h 50mTurkish Airlines

Mon 5/115:55 amOPO - SFO

1 stop36h 50mTurkish Airlines

Deal found 12/14

$730

Tue 3/314:45 pmSFO - OPO

1 stop33h 25mScandinavian Airlines

Wed 4/811:50 amOPO - SFO

1 stop34h 50mScandinavian Airlines

Deal found 12/12

$699

Mon 2/2310:57 pmSFO - OPO

2 stops26h 33mMultiple Airlines

Mon 3/211:25 amOPO - SFO

1 stop37h 05mMultiple Airlines

Deal found 12/14

$778

Wed 3/117:50 pmSFO - OPO

1 stop31h 05mTurkish Airlines

Wed 3/1810:55 amOPO - SFO

1 stop37h 50mTurkish Airlines

Deal found 12/14

$736

Wed 4/2910:45 pmSFO - OPO

2 stops49h 55mScandinavian Airlines

Mon 5/1111:50 amOPO - SFO

1 stop34h 50mScandinavian Airlines

Deal found 12/14

$754

Thu 1/296:50 pmSFO - OPO

1 stop36h 20mTurkish Airlines

Mon 2/24:10 pmOPO - SFO

1 stop32h 35mTurkish Airlines

Deal found 12/11

$775

Last-minute flights from San Francisco to Porto
Discover last-minute flight deals from San Francisco to Porto. Data last updated December 14, 2025 and is based on user searches.

Tue 1/131:10 pmSFO - OPO

1 stop36h 45mTurkish Airlines

Thu 1/2210:55 amOPO - SFO

1 stop37h 50mTurkish Airlines

Deal found 12/14

$657

Sat 1/174:35 pmSFO - OPO

1 stop18h 20mTAP AIR PORTUGAL

Sat 1/246:55 amOPO - SFO

1 stop15h 50mTAP AIR PORTUGAL

Deal found 12/12

$601

Sat 1/176:50 pmSFO - OPO

1 stop36h 20mTurkish Airlines

Fri 1/304:10 pmOPO - SFO

1 stop26h 55mTurkish Airlines

Deal found 12/12

$707

Sat 1/178:25 amSFO - OPO

2 stops25h 40mMultiple Airlines

Sat 1/248:00 pmOPO - SFO

2 stops31h 35mMultiple Airlines

Deal found 12/12

$714

Sat 1/178:25 amSFO - OPO

2 stops25h 40mMultiple Airlines

Fri 1/306:00 pmOPO - SFO

2 stops26h 40mMultiple Airlines

Deal found 12/12

$717

Mon 1/194:35 pmSFO - OPO

1 stop14h 25mTAP AIR PORTUGAL

Tue 1/276:00 pmOPO - SFO

1 stop28h 30mTAP AIR PORTUGAL

Deal found 12/11

$576

Thu 1/226:50 pmSFO - OPO

1 stop36h 20mTurkish Airlines

Sat 1/3110:55 amOPO - SFO

1 stop32h 10mTurkish Airlines

Deal found 12/12

$682

Thu 1/221:10 pmSFO - OPO

1 stop42h 00mTurkish Airlines

Sun 2/14:30 pmOPO - SFO

1 stop32h 15mTurkish Airlines

Deal found 12/13

$765

Wed 1/286:50 pmSFO - OPO

1 stop31h 05mTurkish Airlines

Wed 2/44:10 pmOPO - SFO

1 stop32h 35mTurkish Airlines

Deal found 12/13

$661

Wed 1/284:35 pmSFO - OPO

2 stops21h 55mMultiple Airlines

Wed 2/48:45 amOPO - SFO

1 stop19h 25mMultiple Airlines

Deal found 12/13

$752

Thu 1/296:50 pmSFO - OPO

1 stop36h 20mTurkish Airlines

Mon 2/24:10 pmOPO - SFO

1 stop32h 35mTurkish Airlines

Deal found 12/11

$775

One-way flights from San Francisco to Porto
Search for one-way flight options from San Francisco to Porto. Find affordable one-way fares based on user searches. Data last updated December 14, 2025.

Tue 2/241:00 pmSFO - OPO

2 stops23h 10mMultiple Airlines

Deal found 12/11

$300

Sun 2/2210:15 amSFO - OPO

3 stops49h 00mMultiple Airlines

Deal found 12/11

$327

Wed 2/254:35 pmSFO - OPO

2 stops36h 20mMultiple Airlines

Deal found 12/11

$338

Mon 2/236:29 amSFO - OPO

2 stops44h 16mMultiple Airlines

Deal found 12/11

$339

Sat 2/216:00 amSFO - OPO

3 stops42h 20mMultiple Airlines

Deal found 12/11

$346

Fri 2/207:10 pmSFO - OPO

2 stops30h 50mMultiple Airlines

Deal found 12/11

$360

Wed 12/314:35 pmSFO - OPO

2 stops36h 20mMultiple Airlines

Deal found 12/13

$383

Wed 4/159:00 amSFO - OPO

3 stops26h 55mMultiple Airlines

Deal found 12/14

$401

Find flight deals from San Francisco to Porto

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$546 (FlightHub)
One-way from	$300 (Kiwi.com)
Popular in	July
Cheapest in	January
Average price	$925

Provider with most accurate pricing for San Francisco-Porto flight deals.

Search Deals

Provider most trusted by Cheapflights users for San Francisco-Porto flights.

Search Deals

From San Francisco to Porto

Search Deals

One-way flight from San Francisco to Porto

Search Deals

Highest demand for flights based on searches. 20% potential increase in price ($238 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights 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

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 3/11

1:05 pm-4:55 pm

2 stops44h 50m

Porto

Wed 3/18

10:25 am-3:35 pm

1 stop36h 10m

$590

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 4/30

4:45 pm-8:40 am

1 stop31h 55m

Porto

Sat 5/9

9:30 am-2:40 pm

1 stop37h 10m

$649

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 1/28

6:50 pm-9:55 am

1 stop31h 05m

Porto

Wed 2/4

4:10 pm-4:45 pm

1 stop32h 35m

$661

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 3/31

4:45 pm-10:10 am

1 stop33h 25m

Porto

Wed 4/8

11:50 am-2:40 pm

1 stop34h 50m

$699

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 4/29

6:50 pm-9:40 am

1 stop30h 50m

Porto

Mon 5/11

5:55 am-10:45 am

1 stop36h 50m

$730

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 3/11

7:50 pm-9:55 am

1 stop31h 05m

Porto

Wed 3/18

10:55 am-5:45 pm

1 stop37h 50m

$736

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 1/28

4:35 pm-10:30 pm

2 stops21h 55m

Porto

Wed 2/4

8:45 am-8:10 pm

1 stop19h 25m

$752

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 4/29

10:45 pm-8:40 am

2 stops49h 55m

Porto

Mon 5/11

11:50 am-2:40 pm

1 stop34h 50m

$754

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 1/29

6:50 pm-3:10 pm

1 stop36h 20m

Porto

Mon 2/2

4:10 pm-4:45 pm

1 stop32h 35m

$775

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 2/23

10:57 pm-9:30 am

2 stops26h 33m

Porto

Mon 3/2

11:25 am-4:30 pm

1 stop37h 05m

$778

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 19 results

Compare providers for flights from San Francisco to Porto

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Porto in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on San Francisco-Porto flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Francisco-Porto flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Francisco-Porto flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on San Francisco-Porto flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Francisco-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from San Francisco to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from San Francisco with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Porto

How far ahead should I book a flight from San Francisco to Porto?

To ensure you get the cheapest price possible for a flight from San Francisco to Porto, you should look to book at least 89 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from San Francisco to Porto?

Currently, January is the cheapest month in which you can book a flight from San Francisco to Porto (average of $543). Flying from San Francisco to Porto in July is currently the most expensive (average of $806). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to OPO?

Unlike in the morning, when flights are generally more expensive, you can save up to 21% on flights from San Francisco to Porto by exploring options for tickets in the afternoon.

What is the cheapest day to fly from San Francisco to Porto?

Travelers seeking maximum savings on their San Francisco to Porto flight should consider departing on Sunday afternoons when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Porto

Read reviews from past customers who have flown SWISS, United Airlines, and TAP AIR PORTUGAL from San Francisco to Porto. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

SWISS

7.5

Good

1,812 reviews

Reviews

1 / 20

10.0

Excellent

Leonardo,Aug 2025

AMS - ZRH

Amazing alternative from Europe to Hong Kong. Quick connection (even with a non-European passport) and friendly staff that helped me and my family.

SWISS

7.5

Good

1,812 reviews

SWISS

7.5

Good

1,812 reviews

Reviews

1 / 20

10.0

Excellent

Leonardo,Aug 2025

AMS - ZRH

Amazing alternative from Europe to Hong Kong. Quick connection (even with a non-European passport) and friendly staff that helped me and my family.

United Airlines

7.4

Good

9,092 reviews

SWISS

7.5

Good

1,812 reviews

Reviews

1 / 20

10.0

Excellent

Leonardo,Aug 2025

AMS - ZRH

Amazing alternative from Europe to Hong Kong. Quick connection (even with a non-European passport) and friendly staff that helped me and my family.

TAP AIR PORTUGAL

7.2

Good

2,088 reviews

SWISS

7.5

Good

1,812 reviews

Reviews

1 / 20

10.0

Excellent

Leonardo,Aug 2025

AMS - ZRH

Amazing alternative from Europe to Hong Kong. Quick connection (even with a non-European passport) and friendly staff that helped me and my family.

Air Canada

7.1

Good

10,522 reviews

SWISS

7.5

Good

1,812 reviews

Reviews

1 / 20

10.0

Excellent

Leonardo,Aug 2025

AMS - ZRH

Amazing alternative from Europe to Hong Kong. Quick connection (even with a non-European passport) and friendly staff that helped me and my family.

Lufthansa

6.8

Okay

7,626 reviews

SWISS

7.5

Good

1,812 reviews

Reviews

1 / 20

10.0

Excellent

Leonardo,Aug 2025

AMS - ZRH

Amazing alternative from Europe to Hong Kong. Quick connection (even with a non-European passport) and friendly staff that helped me and my family.

Related info for your journey

How long is the flight from San Francisco to Porto?
There are many flights that can get you from San Francisco to Porto in 31h 05m. Fly via Scandinavian Airlines or Turkish Airlines to get the fastest option. San Francisco and Porto are separated by a distance of 5566 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from San Francisco to Porto round-trip?
Iberia, at $520, was found to be the cheapest airline from San Francisco to Porto.Alternate airlines to your destination round-trip include Scandinavian Airlines and TAP AIR PORTUGAL. Users have found that Iberia is 42% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from San Francisco to Porto one-way?
The cheapest airlines for a one-way flight from San Francisco to Porto are Iberia ($317), TAP AIR PORTUGAL ($383), and United Airlines ($408).
Where are the most common layover locations when flying from San Francisco to Porto?
Of the flights from San Francisco to Porto that have layovers, most of them stop in Frankfurt am Main.
What are some popular things to do or see while on a layover in Frankfurt am Main?
The majority of Frankfurt am Main visitors spend their time at Römerberg, Festhalle, and Historisches Museum Frankfurt. Travelers on a layover in Frankfurt am Main can visit Römerberg, Festhalle, and Historisches Museum Frankfurt, by traveling 7.4 mi, 6.5 mi, and 7.3 mi, respectively after landing at Frankfurt am Main. Travelers can book a car rental at Frankfurt am Main for about $42 per day to make their sightseeing more efficient.
Where are the least popular layover locations for San Francisco to Porto flights?
Of the flights from San Francisco to Porto that have layovers, the fewest flights stop in Lisbon.
Can I find deals for flights from San Francisco to Porto that include hotel bookings?
Yes. In addition to deals on San Francisco to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from San Francisco to Porto?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Porto.
Can I find deals for business class flights from San Francisco to Porto?
Yes. Cheapflights offers flight deals from San Francisco to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from San Francisco to Porto?
Currently, January is the cheapest month in which you can book a flight from San Francisco to Porto (average of $543). Flying from San Francisco to Porto in July is currently the most expensive (average of $806). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Other flights to Porto

Top 10 airlines flying from San Francisco to Porto

Airline	Cheapest	Average	Flexibility	On-time
Scandinavian Airlines	Cheapest$527	Average$781	FlexibilityNo cancel fee	On-time77%
Iberia	Cheapest$540	Average$1,116	FlexibilityNo cancel fee	On-time77%
TAP AIR PORTUGAL	Cheapest$574	Average$859	FlexibilityNo cancel fee	On-timeN/A
SWISS	Cheapest$636	Average$951	FlexibilityNo cancel fee	On-time79%
United Airlines	Cheapest$652	Average$1,029	FlexibilityNo cancel fee	On-time69%
Lufthansa	Cheapest$659	Average$1,098	FlexibilityNo cancel fee	On-time76%
Delta	Cheapest$661	Average$1,105	FlexibilityNo cancel fee	On-timeN/A
KLM	Cheapest$673	Average$879	FlexibilityNo cancel fee	On-time75%
Vueling	Cheapest$756	Average$949	FlexibilityNo cancel fee	On-time88%
Air Canada	Cheapest$776	Average$1,051	FlexibilityNo cancel fee	On-time67%

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$300+ Cheap flights from San Francisco (SFO) to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/24. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Francisco to Porto with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from San Francisco to Porto are usually found in January or November, booked 89 days in advance, depart on a Thursday or Monday and return on a Wednesday

Cheap flight deals from San Francisco to Porto

Cheapest flights from San Francisco to PortoExplore the most affordable flight options available from San Francisco to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 14, 2025.

Explore the most affordable flight options available from San Francisco to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 14, 2025.

Find flight deals from San Francisco to Porto

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Francisco to Porto that are best for you.

Compare providers for flights from San Francisco to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Porto in December.

Best time to book a flight from San Francisco to Porto

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Everything you need to know about your flight from San Francisco to Porto

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Reviews of airlines servicing Porto

Read reviews from past customers who have flown SWISS, United Airlines, and TAP AIR PORTUGAL from San Francisco to Porto. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from San Francisco to Porto?

What are the cheapest airlines flying from San Francisco to Porto round-trip?

What are the cheapest airlines to fly from San Francisco to Porto one-way?

Where are the most common layover locations when flying from San Francisco to Porto?

What are some popular things to do or see while on a layover in Frankfurt am Main?

Where are the least popular layover locations for San Francisco to Porto flights?

Can I find deals for flights from San Francisco to Porto that include hotel bookings?

How can I find direct flights from San Francisco to Porto?

Can I find deals for business class flights from San Francisco to Porto?

What is the cheapest month to book a flight from San Francisco to Porto?

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Top 10 airlines flying from San Francisco to Porto

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Cheapest flights from San Francisco to Porto
Explore the most affordable flight options available from San Francisco to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 14, 2025.