Question 1

What is the cheapest flight from Porto to San Francisco?

Accepted Answer

In the last 3 days, the lowest price for a flight from Porto to San Francisco was $364 for a one-way ticket and $614 for a round-trip. <a href='/flight-routes/Porto-OPO/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 2

Do I need a passport to fly between Porto and San Francisco?

Accepted Answer

A passport is required to fly from Porto to San Francisco. <a href='/flight-routes/Porto-OPO/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 3

What’s the cheapest day of the week to fly from Porto to San Francisco?

Accepted Answer

Your flight ticket price will generally be cheaper if you fly to San Francisco on a Wednesday and more expensive on a Saturday. On your return trip to Porto, you should consider flying back on a Thursday, and avoid Wednesdays for better deals. Visit our flight page for the latest deals!>/a>

Question 4

What’s the cheapest day of the week to fly from Porto to San Francisco?

Accepted Answer

Your flight ticket price will generally be cheaper if you fly to San Francisco on a Wednesday and more expensive on a Saturday. On your return trip to Porto, you should consider flying back on a Thursday, and avoid Wednesdays for better deals. Visit our flight page for the latest deals!>/a>

Question 5

Which airlines fly non-stop between Porto and San Francisco?

Accepted Answer

There is just one airline that flies from Porto to San Francisco direct and that is Lufthansa. The best round-trip deal found from Lufthansa for the route is $670.

Question 6

Which airlines fly non-stop between Porto and San Francisco?

Accepted Answer

There is just one airline that flies from Porto to San Francisco direct and that is Lufthansa. The best round-trip deal found from Lufthansa for the route is $670.

Question 7

Which aircraft models fly most regularly from Porto to San Francisco?

Accepted Answer

We unfortunately don’t have that data for this specific route.

Question 8

Which airline alliances offer flights from Porto to San Francisco?

Accepted Answer

Star Alliance is the only airline alliance operating flights between Porto and San Francisco.

Question 9

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

Accepted Answer

The cheapest month for flights from Porto to San Francisco is February, where tickets cost $673 (return) on average. On the other hand, the most expensive months are October and December, where the average cost of round-trip tickets is $1,538 and $907 respectively.

Question 10

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

Accepted Answer

The cheapest month for flights from Porto to San Francisco is February, where tickets cost $673 (return) on average. On the other hand, the most expensive months are October and December, where the average cost of round-trip tickets is $1,538 and $907 respectively.

Question 11

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

Accepted Answer

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 from Porto to San Francisco. <a href='/flight-routes/Porto-OPO/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 12

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

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Porto is likely to change within 7 days, so travelers know whether to wait or book now. <a href='/flight-routes/Porto-OPO/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 13

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

Accepted Answer

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 to Porto with another airline. Booking your flights between Porto and SFO can sometimes prove cheaper using this method. <a href='/flight-routes/Porto-OPO/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 14

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

Accepted Answer

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 from Porto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. <a href='/flight-routes/Porto-OPO/San-Francisco-SFO'>Visit our flight page for the latest deals!>/a>

Question 15

What is the cheapest layover airport when flying from Porto to San Francisco?

Accepted Answer

Flights via Munich (MUC) offer the most affordable fares, with an average round-trip price of $779.

Question 16

What is the most popular layover airport when flying from Porto to San Francisco?

Accepted Answer

Lisbon (LIS) is the top choice – 27% of KAYAK users who clicked on 1-stop flights from Porto to San Francisco picked an itinerary connecting there.

Question 17

Which layover airport has the quickest connection when flying from Porto to San Francisco?

Accepted Answer

If you prefer a quick connection, Zurich (ZRH) often has the shortest layovers from Porto to San Francisco, with an average of 1h 01m.

Question 18

Which layover airport offers the shortest total travel time from Porto to San Francisco?

Accepted Answer

Consider flying via Montreal (YUL) for the shortest journey. The average one-way travel time for flights connecting there is 15h 27m.

Question 19

Which airlines provide the cheapest flights from Porto to San Francisco?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Porto to San Francisco were found on Scandinavian Airlines ($614) and TAP AIR PORTUGAL ($615).

Question 20

Which airlines provide the cheapest flights from Porto to San Francisco?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Porto to San Francisco were found on Scandinavian Airlines ($614) and TAP AIR PORTUGAL ($615).

Question 21

How much is a round-trip flight from Porto to San Francisco?

Accepted Answer

Flight prices are below average for this route right now.Flights to San Francisco from Porto usually cost between $896 and $1,647 in November.
The lowest price found in the past 3 days was $614 on Scandinavian Airlines (Nov 21-Dec 4).

Low season	May
High season	August
Cheapest flight	$364

OPO - SFO

$364 Find Cheap Flights from Porto to San Francisco

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Everything you should know

Cheap Flights from Porto to San Francisco (OPO-SFO)

Recent round-trip flight deals from Porto to San Francisco

Recent one-way flight deals from Porto to San Francisco

KAYAK's insights & trends for Porto to San Francisco flights

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

How much is a round-trip flight from Porto to San Francisco?

What’s the cheapest day of the week to fly from Porto to San Francisco?

Your flight ticket price will generally be cheaper if you fly to San Francisco on a Wednesday and more expensive on a Saturday. On your return trip to Porto, you should consider flying back on a Thursday, and avoid Wednesdays for better deals.

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

The cheapest month for flights from Porto to San Francisco is February, where tickets cost $673 (return) on average. On the other hand, the most expensive months are October and December, where the average cost of round-trip tickets is $1,538 and $907 respectively.

Which airlines provide the cheapest flights from Porto to San Francisco?

In the past 3 days, the cheapest round-trip tickets from Porto to San Francisco were found on Scandinavian Airlines ($614) and TAP AIR PORTUGAL ($615).

Which airlines fly non-stop between Porto and San Francisco?

There is just one airline that flies from Porto to San Francisco direct and that is Lufthansa. The best round-trip deal found from Lufthansa for the route is $670.

What is the most popular layover airport when flying from Porto to San Francisco?

Lisbon (LIS) is the top choice – 27% of KAYAK users who clicked on 1-stop flights from Porto to San Francisco picked an itinerary connecting there.

What is the cheapest layover airport when flying from Porto to San Francisco?

Flights via Munich (MUC) offer the most affordable fares, with an average round-trip price of $779.

Which layover airport offers the shortest total travel time from Porto to San Francisco?

Consider flying via Montreal (YUL) for the shortest journey. The average one-way travel time for flights connecting there is 15h 27m.

Which layover airport has the quickest connection when flying from Porto to San Francisco?

If you prefer a quick connection, Zurich (ZRH) often has the shortest layovers from Porto to San Francisco, with an average of 1h 01m.

Good to know

When to book flights from Porto to San Francisco

FAQs for booking flights from Porto to San Francisco

What is the cheapest flight from Porto to San Francisco?

In the last 3 days, the lowest price for a flight from Porto to San Francisco was $364 for a one-way ticket and $614 for a round-trip.

Do I need a passport to fly between Porto and San Francisco?

A passport is required to fly from Porto to San Francisco.

Which aircraft models fly most regularly from Porto to San Francisco?

We unfortunately don’t have that data for this specific route.

Which airline alliances offer flights from Porto to San Francisco?

Star Alliance is the only airline alliance operating flights between Porto and San Francisco.

How does KAYAK find such low prices on flights from Porto 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 from Porto to San Francisco.

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

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

What is the Hacker Fare option on flights from Porto 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 to Porto with another airline. Booking your flights between Porto and SFO can sometimes prove cheaper using this method.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Porto 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 from Porto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Porto to San Francisco

Everything you need to know for your flight from Porto to San Francisco

Information on your arrival and departure airports

Cabin class types available on flights from Porto to San Francisco

Complete your trip to San Francisco with a hotel stay or car rental

Find direct flights to and from Porto and San Francisco

Flights to other popular destinations

Flights from domestic origins to San Francisco

Choose which airport to fly into in San Francisco

Find deals for your return flight