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Cheap flights from Portugal to San Francisco from $495

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to San Francisco departing on 12/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portugal to San Francisco

Recent round-trip flight deals from Portugal to San Francisco

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
6:55 am - 4:05 pmOPO-SFO
17h 10m1 stop
TAP AIR PORTUGAL Logo
4:35 pm - 6:55 pmSFO-OPO
18h 20m1 stop
$637TAP AIR PORTUGAL
Find Deal
Fri, Jan 23 - Sat, Jan 31
Scandinavian Airlines Logo
6:00 pm - 3:35 pmLIS-SFO
28h 35m1 stop
Scandinavian Airlines Logo
5:40 pm - 10:00 pmSFO-LIS
21h 20m2 stops
$704Scandinavian Airlines
Find Deal
Sun, Mar 8 - Fri, Mar 13
Multiple Airlines Logo
6:00 am - 3:55 pmOPO-SFO
17h 55m1 stop
Multiple Airlines Logo
7:25 pm - 6:35 pmSFO-OPO
15h 10m1 stop
$705Multiple Airlines
Find Deal
Sat, Jan 24 - Sat, Jan 31
Lufthansa Logo
5:00 am - 3:55 pmLIS-SFO
18h 55m1 stop
Lufthansa Logo
1:30 pm - 1:20 pmSFO-LIS
15h 50m1 stop
$708Lufthansa
Find Deal
Fri, Dec 26 - Thu, Jan 8
Multiple Airlines Logo
6:00 am - 9:20 pmOPO-SFO
23h 20m2 stops
Multiple Airlines Logo
7:25 pm - 6:35 pmSFO-OPO
15h 10m1 stop
$710Multiple Airlines
Find Deal
Sat, Jan 24 - Sat, Jan 31
Lufthansa Logo
5:00 am - 12:40 pmLIS-SFO
15h 40m1 stop
Lufthansa Logo
9:40 pm - 11:30 pmSFO-LIS
17h 50m1 stop
$711Lufthansa
Find Deal
Mon, Dec 8 - Sat, Dec 27
Air Canada Logo
6:00 am - 9:39 pmOPO-SFO
23h 39m2 stops
Air Canada Logo
6:00 pm - 11:40 amSFO-OPO
33h 40m2 stops
$717Air Canada
Find Deal
Sat, Jan 24 - Sat, Jan 31
United Airlines Logo
6:00 am - 3:55 pmOPO-SFO
17h 55m1 stop
United Airlines Logo
12:43 am - 11:40 amSFO-OPO
26h 57m3 stops
$720United Airlines
Find Deal
Sat, Jan 24 - Fri, Jan 30
United Airlines Logo
5:00 am - 12:40 pmLIS-SFO
15h 40m1 stop
United Airlines Logo
8:35 am - 8:10 amSFO-LIS
15h 35m2 stops
$722United Airlines
Find Deal
Tue, Dec 23 - Mon, Jan 12
Air Canada Logo
7:25 am - 9:31 pmLIS-SFO
22h 06m2 stops
Air Canada Logo
5:00 am - 9:20 amSFO-LIS
20h 20m2 stops
$723Air Canada
Find Deal
Wed, Apr 1 - Sun, Apr 5

KLM flights from Portugal to San Francisco

Our best KLM deals on Portugal to San Francisco flight tickets
KLM
Dec 4
FNC10:20 amFunchal Madeira
33h 30m
1 stop
SFO11:50 amSan Francisco
Dec 8
SFO1:55 pmSan Francisco
35h 40m
1 stop
FNC9:35 amFunchal Madeira
$759
Find similar
KLM
Feb 19
FNC10:20 amFunchal Madeira
33h 30m
1 stop
SFO11:50 amSan Francisco
Feb 28
SFO1:55 pmSan Francisco
35h 40m
1 stop
FNC9:35 amFunchal Madeira
$760
Find similar
KLM
Dec 4
FNC10:20 amFunchal Madeira
32h 15m
2 stops
SFO10:35 amSan Francisco
Dec 8
SFO1:55 pmSan Francisco
35h 40m
1 stop
FNC9:35 amFunchal Madeira
$781
Find similar

United Airlines flights from Portugal to San Francisco

Our best United Airlines deals on Portugal to San Francisco flight tickets
United Airlines
Jan 24
OPO6:00 amPorto
17h 55m
1 stop
SFO3:55 pmSan Francisco
Jan 30
SFO12:43 amSan Francisco
26h 57m
3 stops
OPO11:40 amPorto
$720
Find similar
United Airlines
Jan 24
OPO6:00 amPorto
35h 45m
2 stops
SFO9:45 amSan Francisco
Jan 31
SFO5:00 amSan Francisco
22h 40m
3 stops
OPO11:40 amPorto
$725
Find similar
United Airlines
Dec 23
LIS5:00 amLisbon Humberto Delgado
15h 40m
1 stop
SFO12:40 pmSan Francisco
Jan 7
SFO1:30 pmSan Francisco
15h 50m
1 stop
LIS1:20 pmLisbon Humberto Delgado
$726
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated November 16, 2025.
Use the filters below to find and compare flights from Portugal to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortoSan Francisco

OPO - SFO

OPOSFO

Porto

Fri 1/23

6:55 am-4:05 pm

1 stop17h 10m

San Francisco

Sat 1/31

4:35 pm-6:55 pm

1 stop18h 20m

$637

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Sun 3/8

6:00 pm-3:35 pm

1 stop28h 35m

San Francisco

Fri 3/13

5:40 pm-10:00 pm

2 stops21h 20m

$704

PortoSan Francisco

OPO - SFO

OPOSFO

Porto

Sat 1/24

6:00 am-3:55 pm

1 stop17h 55m

San Francisco

Sat 1/31

7:25 pm-6:35 pm

1 stop15h 10m

$705

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Fri 12/26

5:00 am-3:55 pm

1 stop18h 55m

San Francisco

Thu 1/8

1:30 pm-1:20 pm

1 stop15h 50m

$708

PortoSan Francisco

OPO - SFO

OPOSFO

Porto

Sat 1/24

6:00 am-9:20 pm

2 stops23h 20m

San Francisco

Sat 1/31

7:25 pm-6:35 pm

1 stop15h 10m

$710

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Mon 12/8

5:00 am-12:40 pm

1 stop15h 40m

San Francisco

Sat 12/27

9:40 pm-11:30 pm

1 stop17h 50m

$711

PortoSan Francisco

OPO - SFO

OPOSFO

Porto

Sat 1/24

6:00 am-9:39 pm

2 stops23h 39m

San Francisco

Sat 1/31

6:00 pm-11:40 am

2 stops33h 40m

$717

PortoSan Francisco

OPO - SFO

OPOSFO

Porto

Sat 1/24

6:00 am-3:55 pm

1 stop17h 55m

San Francisco

Fri 1/30

12:43 am-11:40 am

3 stops26h 57m

$720

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Tue 12/23

5:00 am-12:40 pm

1 stop15h 40m

San Francisco

Mon 1/12

8:35 am-8:10 am

2 stops15h 35m

$722

LisbonSan Francisco

LIS - SFO

LISSFO

Lisbon Humberto Delgado

Wed 4/1

7:25 am-9:31 pm

2 stops22h 06m

San Francisco

Sun 4/5

5:00 am-9:20 am

2 stops20h 20m

$723

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from Portugal to San Francisco

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 San Francisco?

If you aren’t able to travel to San Francisco during the month of February, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $768.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from Portugal to San Francisco is on a Tuesday when prices can be found for as low as $799. The most expensive day to fly to San Francisco is Saturday, with ticket prices averaging around $1,327.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Portugal to San Francisco flights are usually those with departure times in the afternoon. Our users have found flights to San Francisco in the afternoon for as low as $613. Flights at noon are often more expensive with an average ticket price of $1,327.

What is the cheapest Portugal to San Francisco flight route?

Fly from Lisbon Humberto Delgado to San Francisco for the best Portugal - San Francisco flight prices

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

You are more likely to see cheaper flights to San Francisco from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $815 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Portugal for as low as $637 on momondo.

What cabin class options are available on Portugal to San Francisco flights?

There are 3 cabin classes available to choose from on Portugal to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Portugal to San Francisco flights?

You could potentially save up to 6% on your flight if you consider stops on a Portugal to San Francisco flight.

Cheap Portugal to San Francisco flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portugal to San Francisco

Best Price Found

$710

Fastest flight time

12h 30m

Direct flights

Tue, Wed, Thu, Sat and Sun

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from Portugal in the past 72 hours is $710. The best round-trip flight deal from Portugal to San Francisco found on momondo in the last 72 hours is $764.
The fastest flight from Portugal to San Francisco takes 12h 30m
Direct flights go from Portugal to San Francisco on Tuesday, Wednesday, Thursday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport near San Francisco: San Francisco (SFO)
Search flight deals

  • When did momondo last update prices for flights from Portugal to San Francisco Airport?

    Prices for flights from Portugal to San Francisco Airport are updated daily.

  • How many operators does momondo search for flights from Portugal to San Francisco Airport?

  • How old do you have to be to fly from Portugal to San Francisco Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portugal to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The necessary travel and health documents for your San Francisco 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 plane model from Portugal to San Francisco?

Best airlines flying from Portugal to San Francisco

Compare and see reviews for airlines that fly from Portugal to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
LEVELPriceFrom $473Free CancellationRating
0.0
Search LEVEL flights
British AirwaysPriceFrom $572Free CancellationRating
6.7
7,527 reviews
Search British Airways flights
DeltaPriceFrom $589Free CancellationRating
7.9
8,007 reviews
Search Delta flights
TAP AIR PORTUGALPriceFrom $648Free CancellationRating
7.1
2,062 reviews
Search TAP AIR PORTUGAL flights
Air FrancePriceFrom $657Free CancellationRating
7.4
1,489 reviews
Search Air France flights
American AirlinesPriceFrom $668Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
LufthansaPriceFrom $670Free CancellationRating
6.8
7,576 reviews
Search Lufthansa flights
United AirlinesPriceFrom $731Free CancellationRating
7.4
9,013 reviews
Search United Airlines flights

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Bodega Bay
Roseville
Calistoga
Hayward
Big Sur
Santa Clara
Daly City
Fremont
Berkeley
Vallejo
Walnut Creek
Half Moon Bay
Salinas
Livermore
Turlock
South San Francisco

Why use momondo?

Why should I use momondo to find a flight deal from Portugal to San Francisco?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portugal to San Francisco for you.

Can I find flights from Portugal to San Francisco with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Portugal to San Francisco flights to just show those with flexible booking policies.

How can momondo help me find flights from Portugal to San Francisco?

Once you have performed a search for Portugal to San Francisco flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Portugal to San Francisco right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San Francisco, momondo offers a useful price alert feature which will track prices for flights to San Francisco from Portugal and alert you when they change.

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