Cheap flights from San Francisco (SFO) to Porto (OPO) from $317

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 10/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SFO — OPO
Apr 16 — Apr 231

The best prices from San Francisco to Porto are usually found in February or January, booked 32 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

Cheap flight deals from San Francisco to Porto

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 11, 2024.

Popular in

December

Cheapest in

February

Round-trip from

$523

One-way from

$477
High demand for flights, 34% potential price rise
Best time to find cheap flights, 31% potential price drop
From San Francisco to Porto
One-way flight from San Francisco to Porto

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

Leaving on a Wednesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 27% on the overall cost on flights from San Francisco to Porto.

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

To save on the cost of your flight from San Francisco to Porto, book at least 33 days before your planned departure. Booking around this time can save you about 20% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $754 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $754.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, February can be a great choice for travel to Porto. Flights to Porto from San Francisco in February are about $1,109 on average during February, but can be found for as low as $444.

When is the cheapest time to fly from San Francisco to Porto (SFO - OPO)?

Unlike in the evening, when flights are generally more expensive, you can save up to 10% on flights from San Francisco to Porto by exploring options for tickets in the afternoon.

Cheap Iberia flights from San Francisco to Porto

Explore cheap flight options specifically provided by Iberia for the route between San Francisco and Porto. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,194,136 searches. Data last updated April 11, 2024.
Take a peek at the cheapest Iberia flights we've detected traveling from San Francisco to Porto. Make sure to check back often as deals are often changing.
Sun 9/228:10 pmSFO - OPO
1 stop17h 05mIberia
Fri 10/119:55 pmOPO - SFO
1 stop28h 15mIberia
Deal found 4/10$713
Wed 10/27:20 pmSFO - OPO
2 stops28h 15mIberia
Fri 10/188:35 pmOPO - SFO
1 stop27h 15mIberia
Deal found 4/10$814
Sun 4/2812:38 pmSFO - OPO
2 stops23h 17mIberia
Mon 5/68:35 pmOPO - SFO
1 stop27h 35mIberia
Deal found 4/9$820
Tue 9/38:10 pmSFO - OPO
1 stop17h 05mIberia
Mon 9/169:55 pmOPO - SFO
1 stop28h 15mIberia
Deal found 4/9$959
Tue 9/32:19 pmSFO - OPO
2 stops17h 36mIberia
Tue 9/178:15 amOPO - SFO
1 stop16h 15mIberia
Deal found 4/9$977
Tue 9/38:10 pmSFO - OPO
1 stop17h 05mIberia
Thu 9/128:35 amOPO - SFO
1 stop17h 35mIberia
Deal found 4/9$980
Tue 9/32:19 pmSFO - OPO
2 stops17h 36mIberia
Wed 9/1112:20 pmOPO - SFO
2 stops19h 44mIberia
Deal found 4/9$987
Sat 5/256:05 pmSFO - OPO
1 stop13h 50mIberia
Tue 6/48:15 amOPO - SFO
1 stop15h 55mIberia
Deal found 4/10$1,139

Cheap United Airlines flights from San Francisco to Porto

Explore cheap flight options specifically provided by United Airlines for the route between San Francisco and Porto. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,194,136 searches. Data last updated April 11, 2024.
Some of the lowest-priced United Airlines flights we've found at this time heading from San Francisco to Porto. Ensure the flight price, dates, time, and airline match your criteria before you book.
Sat 8/1010:40 amSFO - OPO
1 stop15h 05mUnited Airlines
Sat 8/3112:10 pmOPO - SFO
1 stop35h 50mUnited Airlines
Deal found 4/11$832
Sat 4/2712:09 amSFO - OPO
2 stops27h 11mUnited Airlines
Mon 5/612:10 pmOPO - SFO
2 stops28h 46mUnited Airlines
Deal found 4/9$914
Sun 4/2112:09 amSFO - OPO
2 stops27h 16mUnited Airlines
Tue 4/306:00 amOPO - SFO
1 stop14h 40mUnited Airlines
Deal found 4/10$967
Sun 4/2112:09 amSFO - OPO
3 stops27h 16mUnited Airlines
Tue 4/306:00 amOPO - SFO
2 stops21h 00mUnited Airlines
Deal found 4/10$977
Wed 7/177:00 amSFO - OPO
1 stop15h 55mUnited Airlines
Tue 7/2312:35 pmOPO - SFO
2 stops20h 21mUnited Airlines
Deal found 4/10$1,112
Sat 6/15:00 amSFO - OPO
2 stops17h 55mUnited Airlines
Mon 6/109:00 amOPO - SFO
2 stops19h 57mUnited Airlines
Deal found 4/10$1,143
Sun 7/217:00 amSFO - OPO
1 stop15h 55mUnited Airlines
Mon 8/59:00 amOPO - SFO
2 stops23h 56mUnited Airlines
Deal found 4/11$1,234

Cheap San Francisco to Porto flights in April & May 2024

Find cheap flight options from San Francisco to Porto specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,194,136 searches. Prices were last updated on April 11, 2024.
Listed are some of the best fares we've found on flights departing from San Francisco to Porto in 2024. Check back in a little while for more flight options.
Mon 4/222:40 pmSFO - OPO
2 stops34h 20mMultiple Airlines
Tue 4/303:30 pmOPO - SFO
1 stop37h 20mMultiple Airlines
Deal found 4/10$732
Mon 4/228:30 pmSFO - OPO
1 stop28h 30mMultiple Airlines
Tue 4/303:30 pmOPO - SFO
1 stop37h 20mMultiple Airlines
Deal found 4/10$789
Sun 4/2812:38 pmSFO - OPO
2 stops23h 17mIberia
Mon 5/68:35 pmOPO - SFO
1 stop27h 35mIberia
Deal found 4/9$820
Sun 4/281:50 pmSFO - OPO
1 stop17h 50mKLM
Mon 5/65:00 amOPO - SFO
1 stop14h 45mKLM
Deal found 4/9$835
Sat 4/2712:09 amSFO - OPO
2 stops27h 11mUnited Airlines
Mon 5/612:10 pmOPO - SFO
2 stops28h 46mUnited Airlines
Deal found 4/9$914
Fri 4/197:40 pmSFO - OPO
1 stop14h 50mSWISS
Wed 5/112:25 pmOPO - SFO
1 stop35h 40mSWISS
Deal found 4/10$928
Sat 5/44:35 pmSFO - OPO
1 stop22h 10mMultiple Airlines
Thu 5/96:00 amOPO - SFO
1 stop15h 50mMultiple Airlines
Deal found 4/10$940
Fri 4/1910:55 amSFO - OPO
2 stops20h 35mDelta
Wed 5/15:00 amOPO - SFO
1 stop14h 45mDelta
Deal found 4/10$944
Mon 4/228:25 amSFO - OPO
2 stops20h 15mMultiple Airlines
Tue 4/308:40 amOPO - SFO
2 stops20h 12mMultiple Airlines
Deal found 4/10$947

San Francisco to Porto 2024 flight deals

Discover exclusive flight deals for travel between San Francisco and Porto in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,194,136 searches. Data last updated April 11, 2024.
Listed are some of the best fares we've found on flights departing from San Francisco to Porto in 2024. Check back in a little while for more flight options.
Sun 11/246:20 amSFO - OPO
2 stops21h 15mMultiple Airlines
Tue 12/36:00 amOPO - SFO
2 stops36h 47mMultiple Airlines
Deal found 4/10$652
Sun 11/241:25 pmSFO - OPO
1 stop18h 20mMultiple Airlines
Tue 12/36:00 amOPO - SFO
2 stops45h 17mMultiple Airlines
Deal found 4/10$654
Sun 11/241:25 pmSFO - OPO
1 stop18h 20mMultiple Airlines
Tue 12/36:00 amOPO - SFO
1 stop22h 10mMultiple Airlines
Deal found 4/10$659
Sun 9/228:10 pmSFO - OPO
1 stop17h 05mIberia
Fri 10/119:55 pmOPO - SFO
1 stop28h 15mIberia
Deal found 4/11$706
Sun 9/228:10 pmSFO - OPO
1 stop17h 05mIberia
Fri 10/119:55 pmOPO - SFO
1 stop28h 15mIberia
Deal found 4/10$713
Mon 4/222:40 pmSFO - OPO
2 stops34h 20mMultiple Airlines
Tue 4/303:30 pmOPO - SFO
1 stop37h 20mMultiple Airlines
Deal found 4/10$732
Thu 11/216:20 amSFO - OPO
2 stops21h 15mAir Canada
Sun 12/86:00 amOPO - SFO
2 stops35h 39mAir Canada
Deal found 4/10$751
Thu 11/218:25 amSFO - OPO
2 stops19h 10mLufthansa
Sun 12/84:35 pmOPO - SFO
1 stop28h 00mLufthansa
Deal found 4/10$752
Thu 11/78:39 amSFO - OPO
2 stops23h 06mUnited Airlines
Sat 11/166:00 amOPO - SFO
1 stop18h 05mUnited Airlines
Deal found 4/11$760

San Francisco to Porto flights leaving soon

Find last-minute flight options from San Francisco to Porto for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,194,136 searches. Data last updated April 11, 2024.
Book one of these great deals on flights from San Francisco to Porto. It's wise to confirm all flight details are correct before booking.
Fri 4/197:40 pmSFO - OPO
1 stop14h 50mSWISS
Wed 5/112:25 pmOPO - SFO
1 stop35h 40mSWISS
Deal found 4/10$928
Fri 4/1910:55 amSFO - OPO
2 stops20h 35mDelta
Wed 5/15:00 amOPO - SFO
1 stop14h 45mDelta
Deal found 4/10$944
Fri 4/1910:05 amSFO - OPO
2 stops21h 25mDelta
Wed 5/15:00 amOPO - SFO
2 stops21h 04mDelta
Deal found 4/10$954
Sun 4/217:40 pmSFO - OPO
1 stop31h 40mSWISS
Sun 4/288:40 amOPO - SFO
1 stop15h 25mSWISS
Deal found 4/10$958
Sun 4/2112:09 amSFO - OPO
2 stops27h 16mUnited Airlines
Tue 4/306:00 amOPO - SFO
1 stop14h 40mUnited Airlines
Deal found 4/10$967
Sun 4/2112:09 amSFO - OPO
3 stops27h 16mUnited Airlines
Tue 4/306:00 amOPO - SFO
2 stops21h 00mUnited Airlines
Deal found 4/10$977
Sun 4/2110:56 pmSFO - OPO
2 stops39h 54mLufthansa
Sun 4/2811:10 amOPO - SFO
1 stop17h 50mLufthansa
Deal found 4/10$979
Sun 4/2110:56 pmSFO - OPO
2 stops39h 54mLufthansa
Sun 4/286:00 amOPO - SFO
2 stops23h 00mLufthansa
Deal found 4/10$1,007
Fri 4/196:00 amSFO - OPO
3 stops45h 30mMultiple Airlines
Wed 5/18:15 amOPO - SFO
2 stops46h 05mMultiple Airlines
Deal found 4/10$12,121

One-way flights to Porto from San Francisco

Search for one-way flight options from San Francisco to Porto. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,194,136 searches. Data last updated April 11, 2024.
Users traveling one-way from San Francisco to Porto can select one of these great deals. Users can also find round-trip San Francisco to Porto flights by using the search form above.
Wed 10/24:20 pmSFO - OPO
1 stop14h 40mTAP AIR PORTUGAL
Deal found 4/10$317
Wed 10/24:20 pmSFO - OPO
2 stops22h 35mMultiple Airlines
Deal found 4/10$348
Sun 9/224:20 pmSFO - OPO
2 stops22h 50mMultiple Airlines
Deal found 4/10$356
Sun 9/224:20 pmSFO - OPO
1 stop16h 45mTAP AIR PORTUGAL
Deal found 4/10$358
Sun 7/218:10 pmSFO - OPO
1 stop27h 50mVueling
Deal found 4/11$412
Wed 9/112:41 pmSFO - OPO
2 stops24h 14mMultiple Airlines
Deal found 4/10$415
Sun 7/78:10 pmSFO - OPO
1 stop27h 50mVueling
Deal found 4/9$416
Sun 9/228:10 pmSFO - OPO
1 stop27h 50mVueling
Deal found 4/10$459
Thu 7/118:10 pmSFO - OPO
1 stop27h 25mVueling
Deal found 4/10$477

Find flights from San Francisco to Porto within your budget

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, Cheapflights users made 3,194,136 searches. Data last updated April 11, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$713 - $927

Route

Depart

Return

Price

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 9/22

1 stop17h 05m

Porto

Fri 10/11

1 stop28h 15m

$713

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 4/22

2 stops34h 20m

Porto

Tue 4/30

1 stop37h 20m

$732

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 9/18

1 stop30h 50m

Porto

Thu 10/10

1 stop15h 35m

$827

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 8/10

1 stop15h 05m

Porto

Sat 8/31

1 stop35h 50m

$832

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 4/28

1 stop17h 50m

Porto

Mon 5/6

1 stop14h 45m

$835

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 9/18

2 stops20h 45m

Porto

Thu 10/10

1 stop28h 25m

$836

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 9/22

2 stops34h 05m

Porto

Fri 10/11

1 stop15h 25m

$866

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 9/2

1 stop16h 45m

Porto

Tue 9/17

1 stop22h 36m

$884

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 9/3

1 stop32h 40m

Porto

Mon 9/16

1 stop26h 30m

$927

Flights are sorted by cheapest first

Deals found on 4/10

When is the best time to book a flight from San Francisco to Porto?

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Porto. Price data was last updated on January 28, 2024.
To ensure you get the cheapest price possible for a flight from San Francisco to Porto, you should look to book at least 32 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.
Search Deals

When is the cheapest time to fly from San Francisco to Porto?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Porto. Price data was last updated on April 7, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their San Francisco to Porto flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Porto by month

Plan your trip from San Francisco to Porto by taking into account the cheapest months to travel. The average price of a one-way flight from San Francisco to Porto is currently $395 while a round-trip flight costs $828. Price data was last updated on April 7, 2024.

Currently, January is the cheapest month in which you can book a flight from San Francisco to Porto (average of $523). Flying from San Francisco to Porto in June is currently the most expensive (average of $1,036). 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.

January

$523

February

$581

March

$598

April

$728

May

$888

June

$1,036

July

$975

August

$869

September

$767

October

$696

November

$545

December

$645

Temperature and rainfall in Porto by month

Plan your trip to Porto by taking into account the average temperature and rainfall totals by month.

OPO

Temperature

48.2 - 68 °F

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated April 11, 2024.
Peruse reviews from past customers who have flown with Iberia, United Airlines and SWISS from San Francisco to Porto to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
11,206 reviews

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

8.1
Very good
11,206 reviews
8.1
Very good
11,206 reviews

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

7.9
Good
1,658 reviews
8.1
Very good
11,206 reviews

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

7.8
Good
2,105 reviews
8.1
Very good
11,206 reviews

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

7.6
Good
1,845 reviews
8.1
Very good
11,206 reviews

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

7.5
Good
3,684 reviews
8.1
Very good
11,206 reviews

Boarding

8.2

Food

7.5

Comfort

7.9

Overall

8.1

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

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.
  • Can I find flights from San Francisco to Porto for under $800 on Cheapflights?

    Yes, there are multiple flights from San Francisco to Porto for under $800. The cheapest flight booked recently is on Iberia for just $713, but on average you can expect to pay $852.

  • Are there last-minute flights available from San Francisco to Porto for under $1,000?

    There are currently 11+ open flights from San Francisco to Porto within the next 7 days for less than $1,000.

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

    Iberia, at $713, was found to be the cheapest airline from San Francisco to Porto.Alternate airlines to your destination round-trip include British Airways and United Airlines. Users have found that Iberia is 35% 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 TAP AIR PORTUGAL ($317), Vueling ($412), and Air Transat ($479).

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

  • What does SFO to OPO mean?

    San Francisco Airport is SFO and Porto Airport is OPO. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

  • 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 Lisbon?

    The majority of Lisbon visitors spend their time at Chiado, Praça do Príncipe Real, and Praça de D. Pedro IV. Travelers on a layover in Lisbon can visit Chiado, Praça do Príncipe Real, and Praça de D. Pedro IV, by traveling 4.5 mi, 4.2 mi, and 4.3 mi, respectively after landing at Lisbon Humberto Delgado. Travelers can book a car rental at Lisbon Humberto Delgado for about $25 per day to make their sightseeing more efficient.

  • 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 extra baggage allowance?

    The amount of baggage you can bring depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from San Francisco to Porto with specific airlines?

    Yes, Cheapflights allows you to browse and filter flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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 see available direct flights.

  • 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.

  • Can I find deals for flights from San Francisco to Porto that allow pets onboard?

    Many airlines do offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from San Francisco to Porto?

    Yes, you can often find last-minute deals on San Francisco to Porto flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the San Francisco to Porto flight deals updated?

    The San Francisco to Porto flight deals you see on this page were last updated on 4/11.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from San Francisco to Porto

Discover the top 10 airlines that operate flights from San Francisco to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,194,136 searches. Data last updated April 11, 2024.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$492Average$773FlexibilityNo cancel feeOn-time77%
Search Iberia flights
VuelingCheapest$539Average$1,040FlexibilityNo cancel feeOn-time88%
Search Vueling flights
DeltaCheapest$564Average$875FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
British AirwaysCheapest$595Average$1,087FlexibilityNo cancel feeOn-time70%
Search British Airways flights
TAP AIR PORTUGALCheapest$633Average$937FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
KLMCheapest$642Average$885FlexibilityNo cancel feeOn-time75%
Search KLM flights
SWISSCheapest$697Average$1,105FlexibilityNo cancel feeOn-time79%
Search SWISS flights
United AirlinesCheapest$705Average$1,171FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest$723Average$996FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest$735Average$904FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Search flights from San Francisco to Porto by cabin class

Find flights from San Francisco to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Francisco to Porto?

Cheapflights helps you search for flights from San Francisco to Porto via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Porto?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from San Francisco to Porto for you. Better yet — we are completely free to use.

Can Cheapflights find flights from San Francisco to Porto with no change fees?

Yes, we can. To see specific flights from San Francisco to Porto with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from San Francisco to Porto become cheaper?

Not ready to book yet? You can track prices for flights from San Francisco to Porto on Cheapflights with our Price Alert feature and get notified when better prices are available.

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