Question 1

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

Accepted Answer

Our cheapest airline available from Porto to San Francisco is Air France. Our recent data shows that you can find tickets from as low as $636 on this airline. Additional options worth looking into are United Airlines and SWISS, starting at $686 and $691 round-trip. These flights start at 21% lower than the current average price 3 months from now.

Question 2

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

Accepted Answer

The cheapest airlines for a one-way flight from Porto to San Francisco are Iberia ($380), Vueling ($396), and American Airlines ($591).

Question 3

E

Accepted Answer

Currently, September is the cheapest month in which you can book a flight from Porto to San Francisco (average of $268). Flying from Porto to San Francisco in June is currently the most expensive (average of $384). 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

$274

February

$281

March

$330

April

$306

May

$314

June

$384

July

$367

August

$298

September

$268

October

$268

November

$287

December

$268

Question 4

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

Accepted Answer

The price you pay for your flight from Porto to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 25 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Question 5

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

Accepted Answer

Travelers seeking maximum savings on their Porto to San Francisco flight should consider departing on Thursday mornings 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.

Question 6

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

Accepted Answer

The Porto to San Francisco flight deals you see on this page were last updated on 5/5.

Question 7

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

Accepted Answer

Consider American Airlines, British Airways or Delta when booking your flight. These represent the most popular airlines when flying from Porto to San Francisco.

Question 8

Can I find flights from Porto to San Francisco for under $700 on Cheapflights?

Accepted Answer

Yes, there are multiple flights from Porto to San Francisco for under $700. The cheapest flight booked recently is on Multiple Airlines for just $627, but on average you can expect to pay $756.

Question 9

Are there last-minute flights available from Porto to San Francisco for under $700?

Accepted Answer

There are currently 20+ open flights from Porto to San Francisco within the next 7 days for less than $700.

Question 10

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

Accepted Answer

Travelers have found that booking a Wednesday departure is the best way to save up to 50% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

Question 11

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

Accepted Answer

Find a great deal and save up to 35% by booking at least 26 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Porto to San Francisco within the next two weeks, with the cheapest ticket starting at $604.

Question 12

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

Accepted Answer

December can be a great time to fly to San Francisco from Porto with a flight ticket averaging about $810. Cheapflights users have found deals in the month of December for as cheap as $542. The most expensive prices can be found in the month of July.

Question 13

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

Accepted Answer

When flying from Porto to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Question 14

What does OPO to SFO mean?

Accepted Answer

This is defined as Porto Airport (OPO) and San Francisco Airport (SFO). Codes like San Francisco Airport are often used to just call airports uniquely.

Question 15

Can I find deals for flights from Porto to San Francisco that include extra baggage allowance?

Accepted Answer

The amount of baggage you can bring on your Porto to San Francisco flight 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.

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

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

Question 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

Yes. Cheapflights offers flight deals from Porto 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.

Question 20

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

Accepted Answer

Many airlines flying from Porto to San Francisco 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.

Question 21

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

Accepted Answer

Yes, you can often find last-minute deals on Porto to San Francisco 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.

Question 22

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

Accepted Answer

Cheapflights helps you search for flights from Porto to San Francisco 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.

Question 23

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

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from Porto to San Francisco by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 24

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

Accepted Answer

Users can book flights with no change fees policies with our dedicated filters. Book flights from Porto to San Francisco flexibly with Cheapflights today.

Question 25

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

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Popular in	July
Cheapest in	December
Average price	$794
Round-trip from	$268

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$570	Average$729	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
British Airways	Cheapest$584	Average$971	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest$651	Average$710	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
American Airlines	Cheapest$754	Average$1,042	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Cheap flights from Porto (OPO) to San Francisco (SFO) from $320

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 10/1. 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.

The best prices from Porto to San Francisco are usually found in December or November, booked 25 days in advance, depart on a Wednesday or Monday and return on a Thursday

Cheap flight deals from Porto to San Francisco

Popular in

Cheapest in

Average price

Round-trip from

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

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

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

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

Cheap United Airlines flights from Porto to San Francisco

Find some of the cheapest United Airlines flights traveling from Porto to San Francisco. Come back soon if you're not finding the exact deal you're looking for.

Cheap SWISS flights from Porto to San Francisco

To aid your search, here are some of the cheapest SWISS flights we've found from Porto to San Francisco. Deals are refreshing constantly so come back soon for more options.

Cheap Porto to San Francisco flights in May & June 2024

Find cheap flight options from Porto to San Francisco specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,719,943 searches. Prices were last updated on 5月 6, 2024.

These are some of the best deals we've found on flights to San Francisco in 2024 at this time. For more flight deals, be sure to check back very soon.

Porto to San Francisco 2024 flight deals

Discover exclusive flight deals for travel between Porto and San Francisco in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,719,943 searches. Data last updated 5月 6, 2024.

These are some of the best deals we've found on flights to San Francisco in 2024 at this time. For more flight deals, be sure to check back very soon.

Porto to San Francisco flights leaving soon

Consider one of these great deals we found on last-minute flights from Porto to San Francisco. Tip: verify your flight details before completing your reservation.

One-way flights to San Francisco from Porto

Users in need of a one-way flight from Porto to San Francisco can choose from these deals. For those needing a return trip from Porto, there is a search form available above.

Find flights from Porto to San Francisco within your budget

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

Use this chart to determine the optimal time to book a round-trip flight from Porto to San Francisco. Price data was last updated on May 3, 2024.

The price you pay for your flight from Porto to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 25 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Use this chart to determine the cheapest time to fly round-trip from Porto to San Francisco. Price data was last updated on May 5, 2024.

Average price of flights to San Francisco by month

Plan your trip from Porto to San Francisco by taking into account the cheapest months to travel. The average price of a one-way flight from Porto to San Francisco is currently $376 while a round-trip flight costs $745. Price data was last updated on April 28, 2024.

Temperature and rainfall in San Francisco by month

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

Reviews of airlines servicing San Francisco

To help decide which airline to fly from Porto to San Francisco, see what other customers have to say about United Airlines, SWISS and American Airlines. You can also see how each airline stacks up 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 Porto to San Francisco. 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 Porto to San Francisco for under $700 on Cheapflights?

Are there last-minute flights available from Porto to San Francisco for under $700?

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

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

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

What does OPO to SFO mean?

Can I find deals for flights from Porto to San Francisco that include extra baggage allowance?

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

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

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

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

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

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

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

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Alternative routes for Porto to San FranciscoSee prices for flight routes from nearby airports that may be better suited for you.

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Top 4 airlines flying from Porto to San Francisco

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Search flights from Porto to San Francisco by cabin class

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

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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 Porto to San Francisco?

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

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

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

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Alternative routes for Porto to San Francisco
See prices for flight routes from nearby airports that may be better suited for you.