HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Francisco

$334+ Cheap flights from Portugal to San Francisco (SFO)

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SFO
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portugal to San Francisco with Cheapflights

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”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Portugal to San Francisco

Keep the following information in mind while searching for Portugal to San Francisco flight deals. Data was last updated June 30, 2025.

Round-trip from

$619
(lol.travel)

One-way from

$334
(Mytrip)

Popular in

August

Cheapest in

February

Average price

$953

Good round-trip deal

$774 or less

Good one-way deal

$789 or less
From Portugal to San Francisco
Search Deals
One-way flight from Portugal to San Francisco
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals
Price to beat on a round-trip flight from Portugal to San Francisco.
Search Deals
Price to beat on a one-way flight from Portugal to San Francisco.
Search Deals

Find flight deals from Portugal to San Francisco

Cheapest flights from Portugal to San Francisco
Explore the most affordable flight options available from Portugal to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1510:00 pmOPO - SFO
1 stop28h 10mMultiple Airlines
Sat 10/188:10 pmSFO - OPO
1 stop17h 10mMultiple Airlines
Deal found 6/29$608
This lol.travel deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:30 pmOPO - SFO
1 stop24h 05mTAP AIR PORTUGAL
Thu 9/184:20 pmSFO - OPO
1 stop14h 40mTAP AIR PORTUGAL
Deal found 6/28$619
This Iberia deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:05 pmLIS - SFO
2 stops33h 51mIberia
Tue 11/258:40 pmSFO - LIS
2 stops27h 00mIberia
Deal found 6/28$687
This KLM deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:30 pmLIS - SFO
1 stop24h 15mKLM
Thu 10/302:50 pmSFO - LIS
1 stop25h 20mKLM
Deal found 6/30$692
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/255:00 amLIS - SFO
1 stop14h 45mDelta
Wed 9/107:05 amSFO - LIS
2 stops17h 45mDelta
Deal found 6/30$693
This British Airways deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/207:10 amLIS - SFO
2 stops24h 49mBritish Airways
Sat 9/274:37 pmSFO - LIS
2 stops22h 33mBritish Airways
Deal found 6/28$700
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/82:00 pmLIS - SFO
2 stops30h 40mMultiple Airlines
Wed 1/284:35 pmSFO - LIS
Nonstop11h 00mMultiple Airlines
Deal found 6/30$702
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2511:05 amLIS - SFO
2 stops30h 13mAmerican Airlines
Wed 9/102:42 pmSFO - LIS
2 stops24h 28mAmerican Airlines
Deal found 6/30$703
This American Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1112:20 pmOPO - SFO
2 stops19h 39mAmerican Airlines
Thu 9/186:10 amSFO - OPO
2 stops17h 25mAmerican Airlines
Deal found 6/28$719
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:00 amOPO - SFO
1 stop18h 00mUnited Airlines
Thu 9/187:25 amSFO - OPO
2 stops18h 20mUnited Airlines
Deal found 6/28$720
This Flighttix deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1111:30 amFNC - SFO
2 stops17h 52mUnited Airlines
Tue 7/155:00 amSFO - FNC
2 stops19h 30mUnited Airlines
Deal found 6/29$724
This Gotogate deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/247:20 pmOPO - SFO
1 stop28h 50mSWISS
Mon 9/87:40 pmSFO - OPO
1 stop28h 15mSWISS
Deal found 6/30$724

Cheapflights Fare Finder

Customize your flight search to find flights from Portugal to San Francisco 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 2,558,603 searches. Data last updated June 30, 2025.
Use the filters below to find and compare flights from Portugal to San Francisco that are best for you.

Fly from

Portugal

Fly to

San Francisco

Route

Depart

Return

Price

PortoSan Francisco

OPO - SFO

OPOSFO

Porto

Tue 9/9

10:30 pm-2:35 pm

1 stop24h 05m

San Francisco

Thu 9/18

4:20 pm-3:00 pm

1 stop14h 40m

$619

PortoSan Francisco

OPO - SFO

OPOSFO

Porto

Tue 9/9

11:50 am-11:45 am

2 stops31h 55m

San Francisco

Thu 9/18

3:05 pm-8:00 am

3 stops32h 55m

$677

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Wed 11/5

9:05 pm-10:56 pm

2 stops33h 51m

San Francisco

Tue 11/25

8:40 pm-7:40 am

2 stops27h 00m

$687

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Thu 10/16

7:30 pm-11:45 am

1 stop24h 15m

San Francisco

Thu 10/30

2:50 pm-11:10 pm

1 stop25h 20m

$692

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Mon 8/25

5:00 am-11:45 am

1 stop14h 45m

San Francisco

Wed 9/10

12:30 pm-2:50 pm

2 stops18h 20m

$693

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Sat 9/20

7:10 am-11:59 pm

2 stops24h 49m

San Francisco

Sat 9/27

4:37 pm-11:10 pm

2 stops22h 33m

$700

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Mon 9/8

2:00 pm-12:40 pm

2 stops30h 40m

San Francisco

Wed 1/28

4:35 pm-11:35 am

Nonstop11h 00m

$702

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Fri 9/5

11:05 am-11:09 pm

2 stops20h 04m

San Francisco

Sun 10/12

4:30 pm-11:05 pm

1 stop22h 35m

$703

PortoSan Francisco

OPO - SFO

OPOSFO

Porto

Thu 9/11

12:20 pm-11:59 pm

2 stops19h 39m

San Francisco

Thu 9/18

6:10 am-7:35 am

2 stops17h 25m

$719

PortoSan Francisco

OPO - SFO

OPOSFO

Porto

Thu 9/11

6:00 am-4:00 pm

1 stop18h 00m

San Francisco

Thu 9/18

7:25 am-9:45 am

2 stops18h 20m

$720

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 38 results
1
2
3
4

Best time to book a flight from Portugal to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Portugal 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 Portugal to San Francisco

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

Currently, January is the cheapest month in which you can book a flight from Portugal to San Francisco (average of $276). Flying from Portugal to San Francisco in June is currently the most expensive (average of $360). 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 PT to SFO?

Find hourly flight availability from Portugal to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Portugal to San Francisco in the morning. If you’re flexible enough to do this you can expect to save up to 40% on your trip compared to booking a flight at noon.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated June 30, 2025.
Read reviews from past customers who have flown Delta, KLM, and SWISS from Portugal to San Francisco. 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.
Delta
8.0
Very good
7,973 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,365 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,654 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,852 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Virgin Atlantic
7.4
Good
654 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

  • What airport do you fly into for flights to San Francisco from Portugal?

    For a flight from Portugal to San Francisco, you will be flying into San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city.

  • How popular is this Portugal to San Francisco flight route?

    This flight path from Portugal to San Francisco was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    To fly one-way, consider booking your trip with Vueling, which is currently one of the cheapest options available, starting at $334. Iberia flights start at $413 while deals on Aer Lingus start at $554 one-way.

  • What are the most popular routes from Portugal to San Francisco?

    The most popular flight routes from Portugal to San Francisco are Lisbon Humberto Delgado - San Francisco, Porto - San Francisco and Funchal Madeira - San Francisco.

  • What are the most reliable airlines from Portugal to San Francisco?

    No one likes to see their flight delayed. When booking a flight from Portugal to San Francisco consider choosing JetBlue (84%), TAP AIR PORTUGAL (84%) or Etihad Airways (82%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Portugal to San Francisco?

    While on average a flight from Portugal to San Francisco is generally $1,494, our data shows the cheapest flight currently is $601. When looking at the most popular route, (Lisbon Humberto Delgado - San Francisco), you can expect to pay $487 for that flight.

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

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

  • How can I find direct flights from Portugal to San Francisco?

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

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

    Yes. Cheapflights offers flight deals from Portugal to San Francisco 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 Portugal to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Portugal to San Francisco (average of $276). Flying from Portugal to San Francisco in June is currently the most expensive (average of $360). 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

Traveling to a place near Portugal?

Book flights to Portugal if you plan to visit one of these locations
Roseville
Mountain View
South San Francisco
Livermore
Santa Cruz
Turlock
Manteca
Watsonville
Fairfield
Antioch
Hollister
Milpitas
Sunnyvale
Newark
Alameda
Hayward
Daly City
Campbell
Capitola
Foster City

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portugal to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
Charles de Gaulle to Los Angeles flights
Frankfurt to Los Angeles flights
Heathrow to Los Angeles flights
Frankfurt to Las Vegas flights
Heathrow to San Francisco flights
Charles de Gaulle to San Francisco flights
Frankfurt to San Francisco flights
Orly to Los Angeles flights
Vienna to Los Angeles flights
Orly to San Francisco flights
Charles de Gaulle to Burbank flights
Frankfurt to San Jose flights
Heathrow to Las Vegas flights
Beauvais-Tille to Los Angeles flights
Frederic Chopin to Los Angeles flights
Madrid to Los Angeles flights
Charles de Gaulle to Long Beach flights
Amsterdam to Los Angeles flights
Munich to Los Angeles flights
Malpensa to Los Angeles flights
Munich to San Francisco flights
Barcelona-El Prat to Los Angeles flights
Linate to Los Angeles flights
Frankfurt to Ontario flights
Orly to Las Vegas flights
Frankfurt to Long Beach flights
Charles de Gaulle to Las Vegas flights
Frankfurt to Santa Ana flights
London City to San Francisco flights
London City to Los Angeles flights
Gatwick to Los Angeles flights
Frankfurt to Oakland flights
Gatwick to San Francisco flights
Charles de Gaulle to Santa Ana flights
Amsterdam to San Francisco flights
Leonardo da Vinci/Fiumicino to Los Angeles flights
Amsterdam to Las Vegas flights
Madrid to San Francisco flights
Zurich to Los Angeles flights
Charles de Gaulle to Oakland flights
Istanbul to Los Angeles flights
Frankfurt-Hahn to San Francisco flights
Gatwick to Las Vegas flights
Duesseldorf Intl to Los Angeles flights
Bruxelles-National to Los Angeles flights

Top 8 airlines flying from Portugal to San Francisco

Discover the top 8 airlines that operate flights from Portugal to San Francisco. 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 2,558,603 searches. Data last updated June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$473Average$623FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$523Average$702FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$572Average$745FlexibilityNo cancel feeOn-time70%
TAP AIR PORTUGALCheapest$613Average$877FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$657Average$958FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$657Average$885FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$659Average$837FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$668Average$764FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.