What is the cheapest airline that flies from California to Porto?

United Airlines, Delta, and SWISS are the most popular carriers operating from California to Porto

How long does it take to fly to Porto?

Flight times from California to Porto vary, but if you’re flying out of Santa Ana and flying into Porto (one of the most popular routes), then the duration is 13h 05m on average. Another popular route from California to Porto is flying from San Francisco to Porto, which will take roughly 14h 25m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Porto?

United Airlines, TAP AIR PORTUGAL and Delta are the top three most popular airlines that fly to Porto from California according to our data. United Airlines is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 13 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from California to Porto Airport?

Prices for flights from California to Porto Airport refresh daily.

How many operators does momondo search for flights from California to Porto Airport?

As of July 2026, there are 13 operators available to choose from for flights from California to Porto Airport.

How old do you have to be to fly from California to Porto Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Porto Airport.

What documentation or ID do you need to fly to Porto Airport?

The necessary travel and health documents for your Porto 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.

$263 Cheap Flights from California to Porto in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from California to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

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

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

4:30 pm - 11:00 pm

SFO

OPO

22h 30m

1 stop

6:00 pm - 2:30 pm

OPO

SFO

28h 30m

1 stop

$654TAP AIR PORTUGAL

Thu, Aug 13 - Wed, Aug 26

4:30 pm - 5:00 pm

SFO

OPO

16h 30m

1 stop

5:00 am - 3:45 pm

OPO

SFO

17h 45m

1 stop

$656TAP AIR PORTUGAL

Thu, Oct 8 - Sat, Oct 31

4:45 pm - 11:10 am

SFO

OPO

34h 25m

1 stop

11:55 am - 2:50 pm

OPO

SFO

34h 55m

1 stop

$691Scandinavian Airlines

Thu, Nov 5 - Wed, Nov 18

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

Wed, Nov 4 - Wed, Nov 11

4:35 pm - 11:50 pm

SFO

OPO

23h 15m

2 stops

2:40 pm - 2:30 pm

OPO

SFO

31h 50m

2 stops

$732Multiple Airlines

Wed, Sep 16 - Wed, Sep 23

12:04 pm - 4:00 pm

SFO

OPO

19h 56m

2 stops

8:20 am - 8:00 pm

OPO

SFO

19h 40m

2 stops

$740Iberia

Wed, Nov 4 - Wed, Nov 11

8:45 am - 9:30 am

SMF

OPO

16h 45m

2 stops

6:00 am - 3:21 pm

OPO

SMF

17h 21m

2 stops

$744Multiple Airlines

Mon, Nov 16 - Thu, Nov 19

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

Tue, Dec 1 - Tue, Dec 8

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Scandinavian Airlines flights from California to Porto

Our best Scandinavian Airlines deals on California to Porto flight tickets

Scandinavian Airlines

Nov 5

SFO4:45 pmSan Francisco

34h 25m

1 stop

OPO11:10 amPorto

Nov 18

OPO11:55 amPorto

34h 55m

1 stop

SFO2:50 pmSan Francisco

$691

Scandinavian Airlines

Nov 4

SFO4:45 pmSan Francisco

16h 15m

1 stop

OPO5:00 pmPorto

Nov 11

OPO11:55 amPorto

34h 55m

1 stop

SFO2:50 pmSan Francisco

$701

United Airlines flights from California to Porto

Our best United Airlines deals on California to Porto flight tickets

United Airlines

Nov 16

SMF11:00 pmSacramento Intl

26h 30m

1 stop

OPO9:30 amPorto

Nov 19

OPO12:35 pmPorto

19h 09m

2 stops

SMF11:44 pmSacramento Intl

$756

United Airlines

Nov 16

SJC6:30 amSan Jose

19h 00m

2 stops

OPO9:30 amPorto

Nov 19

OPO6:00 amPorto

24h 59m

2 stops

SJC10:59 pmSan Jose

$760

United Airlines

Dec 29

BUR9:08 amBurbank Bob Hope

16h 22m

2 stops

OPO9:30 amPorto

Jan 8

OPO6:00 amPorto

34h 39m

2 stops

BUR8:39 amBurbank Bob Hope

$781

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 9/22

7:35 pm-11:25 am

1 stop31h 50m

Porto

Tue 9/29

12:15 pm-4:15 pm

1 stop36h 00m

$263

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 9/22

7:35 pm-7:55 am

1 stop28h 20m

Porto

Tue 9/29

12:15 pm-4:15 pm

1 stop36h 00m

$263

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 8/13

4:30 pm-11:00 pm

1 stop22h 30m

Porto

Wed 8/26

6:00 pm-2:30 pm

1 stop28h 30m

$654

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 10/8

4:30 pm-5:00 pm

1 stop16h 30m

Porto

Sat 10/31

5:00 am-3:45 pm

1 stop17h 45m

$656

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 11/5

4:45 pm-11:10 am

1 stop34h 25m

Porto

Wed 11/18

11:55 am-2:50 pm

1 stop34h 55m

$691

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 11/4

4:45 pm-5:00 pm

1 stop16h 15m

Porto

Wed 11/11

11:55 am-2:50 pm

1 stop34h 55m

$701

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 9/16

4:35 pm-11:50 pm

2 stops23h 15m

Porto

Wed 9/23

2:40 pm-2:30 pm

2 stops31h 50m

$732

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 11/4

12:04 pm-4:00 pm

2 stops19h 56m

Porto

Wed 11/11

8:20 am-8:00 pm

2 stops19h 40m

$740

Quickest round-trip

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Mon 11/16

8:45 am-9:30 am

2 stops16h 45m

Porto

Thu 11/19

6:00 am-3:21 pm

2 stops17h 21m

$744

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 12/1

10:55 pm-9:30 am

2 stops26h 35m

Porto

Tue 12/8

6:00 am-8:10 pm

1 stop22h 10m

$750

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from California to Porto

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

Prices

Airlines

Other information

What is the cheapest month to fly to Porto?

The month of February is, on average, the cheapest month to fly to Porto from California, with most prices found around $625. If you aren’t able to travel during the month of February, then book flights to Porto from California during January instead. Flights to Porto in January, while not as cheap as those in February, still average around $690.

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

You are more likely to see cheaper flights to Porto from California when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $851 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from California for as low as $816 on momondo.

Can stopping save me money on California to Porto flights?

You could potentially save up to 22% on your flight if you consider stops on a California to Porto flight.

Cheap California to Porto flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from California to Porto

Fastest flight time	13h 05m
Direct flights	None

The fastest flight from California to Porto takes 13h 05m

There are no direct flights from California to Porto. There are no popular flight routes from California to Porto.

Search flight deals

Frequently asked questions about flying from California to Porto

When did momondo last update prices for flights from California to Porto Airport?
Prices for flights from California to Porto Airport refresh daily.
How many operators does momondo search for flights from California to Porto Airport?
As of July 2026, there are 13 operators available to choose from for flights from California to Porto Airport.
How old do you have to be to fly from California to Porto Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The necessary travel and health documents for your Porto 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.

Best airlines flying from California to Porto

Compare and see reviews for airlines that fly from California to Porto with momondo

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $431	Free Cancellation	Rating 7.2 2,350 reviews	Search TAP AIR PORTUGAL flights
KLM	PriceFrom $476	Free Cancellation	Rating 7.8 1,550 reviews	Search KLM flights
Scandinavian Airlines	PriceFrom $480	Free Cancellation	Rating 7.4 1,905 reviews	Search Scandinavian Airlines flights
British Airways	PriceFrom $533	Free Cancellation	Rating 6.7 8,131 reviews	Search British Airways flights
Delta	PriceFrom $533	Free Cancellation	Rating 7.8 8,486 reviews	Search Delta flights
Lufthansa	PriceFrom $544	Free Cancellation	Rating 6.8 8,163 reviews	Search Lufthansa flights
Iberia	PriceFrom $545	Free Cancellation	Rating 7.0 3,259 reviews	Search Iberia flights
United Airlines	PriceFrom $562	Free Cancellation	Rating 7.4 10,052 reviews	Search United Airlines flights
SWISS	PriceFrom $623	Free Cancellation	Rating 7.5 2,019 reviews	Search SWISS flights
Turkish Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 4,455 reviews	Search Turkish Airlines flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Pinhao

Esposende

Lamego

Chaves

Arcos de Valdevez

Guimarães

Viseu

Espinho

Ponte de Lima

Mesao Frio

Penafiel

Baiao

Why use momondo?

Why should I use momondo to find a flight deal from California to Porto?

It is quick and easy to find California to Porto flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Porto that suits you.

Can I find flights from California to Porto with flexible booking policies on momondo?

momondo does allow users to show only those flights to Porto from California which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from California to Porto?

momondo helps you find the best flight between California and Porto by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Porto from California. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Porto trip

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Cheap flights from California to Porto from $263

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from California to Porto departing on 9/22. 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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Scandinavian Airlines flights from California to Porto

Our best Scandinavian Airlines deals on California to Porto flight tickets

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Our best United Airlines deals on California to Porto flight tickets

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How to get the cheapest flight ticket from California to Porto

What is the cheapest month to fly to Porto?

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

Can stopping save me money on California to Porto flights?

What is the cheapest airline that flies from California to Porto?

What airlines fly to Porto?

How long does it take to fly to Porto?

Cheap California to Porto flight deals and tips

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Frequently asked questions about flying from California to Porto

Best airlines flying from California to Porto

Compare and see reviews for airlines that fly from California to Porto with momondo

Traveling to a place near Porto?

Why use momondo?

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

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List of cabin classes available on flights landing in Porto. Availability may vary depending on flight origin and airline.

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