$323 Find Cheap Flights from Portugal to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to San Francisco departing on 4/21. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results for flights to San Francisco
These are the airlines KAYAK users have selected most often from within our search results for flights to San Francisco
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Everything you should know

Cheapest round-trip
$622
Overall average: $873
Scandinavian Airlines
Fri 3/6Sun 3/8
LIS - SFO • 1 stop
Cheapest non-stop
$812
Typical prices: $1,096-$1,487
TAP AIR PORTUGAL
Thu 6/4Wed 7/29
LIS - SFO • Non-stop
When to travel
February
Cheapest • 10% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portugal to San Francisco

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portugal to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portugal to San Francisco

Fri, Mar 6 - Sun, Mar 8
Scandinavian Airlines Logo
4:40 pm - 2:35 pm
LIS
-
SFO
29h 55m
1 stop
Scandinavian Airlines Logo
5:40 pm - 4:30 pm
SFO
-
LIS
15h 50m
1 stop
$622Scandinavian Airlines
Thu, Mar 5 - Sun, Mar 8
Multiple Airlines Logo
2:25 pm - 11:50 am
LIS
-
SFO
29h 25m
2 stops
Multiple Airlines Logo
4:40 pm - 9:15 pm
SFO
-
LIS
21h 35m
2 stops
$635Multiple Airlines
Fri, Feb 27 - Sat, Mar 7
Scandinavian Airlines Logo
4:40 pm - 2:35 pm
LIS
-
SFO
29h 55m
1 stop
Scandinavian Airlines Logo
4:40 pm - 5:10 pm
SFO
-
LIS
16h 30m
1 stop
$644Scandinavian Airlines
Mon, Jun 1 - Sun, Jul 26
Iberia Logo
9:20 pm - 6:00 pm
LIS
-
SFO
28h 40m
1 stop
Iberia Logo
7:50 pm - 5:10 pm
SFO
-
LIS
37h 20m
1 stop
$657Iberia
Tue, Jun 2 - Sun, Jul 26
Iberia Logo
9:10 am - 6:00 pm
LIS
-
SFO
16h 50m
1 stop
Iberia Logo
7:50 pm - 5:10 pm
SFO
-
LIS
37h 20m
1 stop
$661Iberia
Mon, Mar 2 - Mon, Mar 16
Air Canada Logo
11:20 am - 10:54 am
LIS
-
SFO
31h 34m
1 stop
Air Canada Logo
8:25 am - 9:20 am
SFO
-
LIS
17h 55m
2 stops
$677Air Canada
Fri, May 15 - Mon, May 18
Delta Logo
5:00 am - 11:45 am
OPO
-
SFO
14h 45m
1 stop
Delta Logo
9:30 am - 3:25 pm
SFO
-
OPO
21h 55m
2 stops
$724Delta
Fri, May 15 - Mon, May 18
Delta Logo
5:00 am - 7:20 pm
OPO
-
SFO
22h 20m
2 stops
Delta Logo
9:30 am - 3:25 pm
SFO
-
OPO
21h 55m
2 stops
$729Delta
Sun, Mar 29 - Sun, Apr 5
Lufthansa Logo
11:40 pm - 12:40 pm
FNC
-
SFO
45h 00m
2 stops
Lufthansa Logo
9:05 pm - 2:45 pm
SFO
-
FNC
33h 40m
2 stops
$1,267Lufthansa
Sat, Mar 28 - Sat, Apr 4
Lufthansa Logo
11:55 pm - 2:30 pm
FNC
-
SFO
45h 35m
2 stops
Lufthansa Logo
9:05 pm - 1:25 am
SFO
-
FNC
20h 20m
2 stops
$1,527Lufthansa
Booking Insights

KAYAK's insights & trends for flights to San Francisco

Get data-powered insights and trends for flights to San Francisco to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to San Francisco is February, where tickets cost $743 on average for one-way flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Portugal is $880 and $873 respectively. For return trips, the best month to travel is February with an average price of $743.

What is a good deal for flights to San Francisco?

If you’re looking for cheap airfare to San Francisco, 25% of our users found tickets to San Francisco for the following prices or less: From Lisbon $831 one-way - $808 round-trip.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 39 days before departure.

Good to know

Low seasonJanuary
Cheapest flight$323
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from Lisbon to San Francisco

FAQs - booking San Francisco flights

  • How far is San Francisco Airport from central San Francisco?

    There are 12 miles between San Francisco city center and San Francisco Airport.

  • What is the name of San Francisco’s airport?

    When flying to San Francisco, you'll arrive at San Francisco Airport (SFO). The airport is also known as San Francisco or San Francisco Intl.

  • How much is a flight to San Francisco?

    On average, a flight to San Francisco costs $849. The cheapest price found on KAYAK in the last 2 weeks cost $647 and departed from Lisbon Humberto Delgado Airport.

  • What is the cheapest day to fly to San Francisco?

    Based on KAYAK data, the cheapest day to fly to San Francisco is Wednesday where tickets can be as cheap as $811. On the other hand, the most expensive day to fly is Monday, where prices are $1,375 on average.

  • How does KAYAK find such low prices on flights to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to San Francisco?

    The cheapest time of day to fly to San Francisco is generally in the morning, when flights cost $865 on average. The most expensive time of day to fly to San Francisco is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $957.

Top tips for finding cheap flights to San Francisco

  • Looking for cheap airfare to San Francisco? 25% of our users found round-trip tickets to San Francisco for the following prices or less: From Lisbon $1,738
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest San Francisco flight deals.

Reviews of the top 5 airlines serving from Portugal to San Francisco

 
See real verified KAYAK customer reviews for airlines flying to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Portugal to San Francisco. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8202 reviews
7.9Comfort
7.8Entertainment
7.2Food
8.5Crew
8.1Boarding
Airline reviews

Awful - both legs. The check in was awful, getting on the plane required walking down a spiral staircase (dangerous), then taking a bus about 5 miles out from the terminal. The seat was broken (I was in business), there was no internet during the flight (both legs). The aircraft was very old. I saw rust in some place, tape holding things up in the bathroom. This was an unacceptable experience for such a long haul flight.

2.0 MediocreShebani, Feb 2026
CDG - SFO
Read more Delta reviews

Awful - both legs. The check in was awful, getting on the plane required walking down a spiral staircase (dangerous), then taking a bus about 5 miles out from the terminal. The seat was broken (I was in business), there was no internet during the flight (both legs). The aircraft was very old. I saw rust in some place, tape holding things up in the bathroom. This was an unacceptable experience for such a long haul flight.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Mean flight attendant. I wanted to reuse my plastic cup, but he (Matthew) said he can't for safety. I then said "I don't want water then" and he poured me a glass. I hope Matthew gets herpes and spends the rest of his life poor, lonely, and homeless.

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Both flights delayed. 2nd flight over 3 hours late mechanical issues

It was good but only meal served is very less. Meantime good to add rice and chicken in one of meal

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

On the way my flight entertainment wouldn’t work the screen went black and no matter how many times I tried to turn it on it wouldn’t. Food was surprisingly good but the tray tables were tiny so you couldn’t get anything else on the table. The seats hardly go back and are not overly comfortable. Wouldn’t fly United again.

this flight was awful from pre-boarding to on the plane. There needs to be more coordination between TAP and My Way. We were in first class and I am handicapped. BY the time we got on the plane there was no place for our baggage and the crew did not handle the situation well. They gave us an argument and said that we'd have to have it checked. Then, after I complained they moved some people's bags to put our small carry ons several seats back of our seats which were in Row 4.

Bad. They gave me a voucher for food to use at the airport but didn’t have time since I had to catch the other plane. No refunds and lack of communication

Negative. Food was awful, seat broken, flight was late, baggage lost and damaged

The ground staff did not load my bag onto the plane and despite me watching from the bus that my bag is not being loaded and taken back on the cart to the terminal, I pointed out to the staff and ge laughed upon checking my tag and knowing they made a mistake. Instead of calling the cart back and loading it he said we can’t fo anything and you should file a report upon landing at RAK. I told them my stay there is short and i needed my bag as it had everything I needed but no avail. Even the pilot was informed, staff of the plane was aware but all in don’t care mode. Upon arriving at Marrakech RAK, i filed a report and being told it might come in next flight tomorrow and we don’t provide delivery service, you must come and pick it up. If it doesn’t arrive on time then it will be sent to your home in the US. Unbelievable stress and inconvenience that could have been easily prevented by the ground staff.

The cabin crew were curt, not with me, but observed with other passengers. They were unduly rude and it was unprovoked and when they realized they were wrong, they made no attempt to apologize for their own confusion.

I was disappointed of the crew, not friendly and attentive. Delay one way for fuel leakage and the plane is so hot. Not that great all around but I’m glad I experienced it so now know better.

Flew Business class and did not like anything, flight attendants were rude and not helpful. Food was of poor quality and I did not eat meals.

Wonderful just hope the had more direct flights to Boston

Boarding process was fast and efficient. Short flight but on time and well organized. I would certainly fly TAP again.

Very long line at the gate, moved slowly. I had expected that boarding a flagship A330neo would be with a jetway directly at the gate, and not a long bus ride to the airplane.

Excellent service; they helped me reschedule so I can fly in an earlier flight

Wonderful staff. The boarding process can be improved a little better by adequate prior communication but all in all they did fine. However the boarding gate was quite unfreindly to elderly and who needs help with sevral stairs.

Flight map did not work. Crew was great, food was good, plane took off on time and landed early. That's all I can ask.

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Very good. Comfortable and I felt well taken care of from start to finish

Bulkhead seats should not be an extra charge. They are extremely uncomfortable. And we missed our connecting flight due to slow luggage retreaval.

Not great - seats were very narrow and food was terrible.

Some of the crew was sassy and not super helpful. The food was okay, but it seems like they were all unprepared compared to my flight I did from JFK to Frankfurt

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

We were in premium economy seats that appeared to be locked in plae, No reclining. My aching back.

The seats were comfortable. So many empty seats allowed for stretching out and sleeping. The onboard entertainment was pretty good. The cabin crew were so kind and kept the passengers well- hydrated, and well fed.

We had American Airlines on our return and it was confusing if we were going with Aa or BA I had 2 different flight numbers and didn’t get our gate until it was boarding. So we were a bit nervous as the which it was

Our Jackson, Mississippi to Dallas Fort Worth flight was delayed on 1/19/26.. This was changed to Jackson to Charlotte in the last minute because of this delay. This started some kind of disconnect between American Airlines and British Airways bookings. We could not go past the passport control in London Heathrow. I had to go to the counter and waited for more than 30 minutes to get a new boarding pass. Problems did not end there. Somehow our entire return flight was canceled by someone. I had to make several phone calls over several days to fix the problem – this was not easy from India. Looks like there was some kind of disconnect between two airlines or some agent did not do it right. I’m anxious to know what went wrong.

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

The flight crew was kind, flexible, and accommodating. The seats on the plane were extremely uncomfortable.

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Entertainment devices on A380 need to be fixed, the seats might do with updates.

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