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

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 California to Porto.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from California 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 California to Porto?

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 Porto with an airline and back to California with another airline.

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

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 Porto from California up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$263 CHEAP FLIGHTS from California to Porto

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Flight Deals

Cheap Flights from California to Porto

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from California to Porto

Tue, Sep 22 - Tue, Sep 29

7:35 pm - 7:55 am

SFO

OPO

28h 20m

1 stop

12:15 pm - 4:15 pm

OPO

SFO

36h 00m

1 stop

$263SWISS

Tue, Sep 22 - Tue, Sep 29

7:35 pm - 11:25 am

SFO

OPO

31h 50m

1 stop

12:15 pm - 4:15 pm

OPO

SFO

36h 00m

1 stop

$263SWISS

Sat, Oct 31 - Fri, Nov 6

5:35 pm - 3:00 pm

SFO

OPO

14h 25m

1 stop

8:00 pm - 2:45 pm

OPO

SFO

26h 45m

1 stop

$656TAP AIR PORTUGAL

Thu, Oct 8 - Sat, Oct 31

4:30 pm - 6:55 pm

SFO

OPO

18h 25m

1 stop

5:00 am - 3:45 pm

OPO

SFO

17h 45m

1 stop

$656TAP AIR PORTUGAL

Wed, Nov 4 - Wed, Nov 11

4:45 pm - 5:00 pm

SFO

OPO

16h 15m

1 stop

11:55 am - 2:50 pm

OPO

SFO

34h 55m

1 stop

$701Scandinavian Airlines

Thu, Nov 5 - Sun, Nov 15

4:45 pm - 11:10 am

SFO

OPO

34h 25m

1 stop

5:35 pm - 2:50 pm

OPO

SFO

29h 15m

1 stop

$712Scandinavian Airlines

Wed, Nov 18 - Wed, Dec 2

8:25 am - 3:20 pm

SFO

OPO

22h 55m

2 stops

1:45 pm - 7:35 pm

OPO

SFO

37h 50m

1 stop

$736Multiple Airlines

Sun, Nov 8 - Tue, Nov 17

11:29 pm - 12:50 pm

SFO

OPO

29h 21m

2 stops

12:05 pm - 4:30 pm

OPO

SFO

36h 25m

1 stop

$736Multiple Airlines

Tue, Dec 1 - Tue, Dec 8

6:30 am - 9:30 am

SFO

OPO

19h 00m

2 stops

6:00 am - 8:10 pm

OPO

SFO

22h 10m

1 stop

$745United Airlines

Tue, Dec 1 - Tue, Dec 8

10:55 pm - 9:30 am

SFO

OPO

26h 35m

2 stops

6:00 am - 8:10 pm

OPO

SFO

22h 10m

1 stop

$750United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$263

Best time to beat the crowds with an average 27% drop in price.

Most popular time to fly with an average 32% increase in price.

Flight from San Francisco to Porto

How does KAYAK find such low prices on flights from California to Porto?
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 California to Porto.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from California to Porto?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from California 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 California to Porto?
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 Porto with an airline and back to California with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from California to Porto?
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 Porto from California up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Lamego

Guimarães

Pinhao

Chaves

Viseu

Esposende

Ponte de Lima

Espinho

Baiao

Arcos de Valdevez

Santa Maria da Feira

Caminha

Mira

Penafiel

Amares

Curia

Everything you need to know for your flight to Porto

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Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Porto

Porto (OPO)

OPO

$263 Find Cheap Flights from California to Porto - Compare and Save

Cheap Flights from California to Porto

Recent round-trip flight deals from California to Porto

Recent one-way flight deals from California to Porto

Recent last minute flight deals from California to Porto

Good to know

Low season

High season

Cheapest flight

FAQs for booking flights from California to Porto

Traveling to a place near Porto?

Everything you need to know for your flight to Porto

Information on the airport you'll fly into in Porto

Cabin class types available on flights to California

Complete your trip to Porto with a hotel stay or car rental

Find direct flights for Porto

Flights to other popular destinations

Flights from domestic origins to Porto

Choose which airport to fly into in Porto

Find deals for your return flight