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

United Airlines, Delta, and KLM 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 12h 52m on average. Another popular route from California to Porto is flying from Los Angeles to Porto, which will take roughly 15h 15m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Porto?

TAP AIR PORTUGAL, United Airlines and Delta are the top three most popular airlines that fly to Porto from California according to our data. TAP AIR PORTUGAL is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 11 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 August 2026, there are 11 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.

$313 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.

8:25 am - 12:05 pmSFO San Francisco-OPO Porto

19h 40m2 stops Montreal Pierre Elliott Trudeau Intl Brussels Bruxelles-National

12:05 pm - 4:30 pmOPO Porto-SFO San Francisco

36h 25m1 stop Zurich

$718Multiple Airlines

Tue, Jan 12 - Wed, Jan 27

7:25 pm - 11:15 amSFO San Francisco-OPO Porto

31h 50m1 stop Zurich

6:00 am - 10:57 pmOPO Porto-SFO San Francisco

24h 57m2 stops Frankfurt am Main Vancouver Intl

$718Multiple Airlines

Sun, Jan 17 - Fri, Jan 22

7:25 pm - 11:15 amSFO San Francisco-OPO Porto

31h 50m1 stop Zurich

12:05 pm - 4:30 pmOPO Porto-SFO San Francisco

36h 25m1 stop Zurich

$725SWISS

Mon, Feb 1 - Thu, Feb 11

7:25 pm - 11:15 amSFO San Francisco-OPO Porto

31h 50m1 stop Zurich

12:05 pm - 4:30 pmOPO Porto-SFO San Francisco

36h 25m1 stop Zurich

$725SWISS

Tue, Jan 19 - Tue, Feb 2

8:50 am - 12:50 pmSMF Sacramento Intl-OPO Porto

20h 00m2 stops Denver Intl Munich Franz Josef Strauss

6:00 am - 10:41 pmOPO Porto-SMF Sacramento Intl

24h 41m2 stops Frankfurt am Main Chicago O'Hare Intl

$731Lufthansa

Sun, Jan 17 - Fri, Jan 22

2:45 pm - 3:20 pmSFO San Francisco-OPO Porto

16h 35m1 stop Frankfurt am Main

6:15 am - 7:35 pmOPO Porto-SFO San Francisco

21h 20m1 stop Munich Franz Josef Strauss

$736Lufthansa

Sun, Jan 17 - Fri, Jan 22

6:15 am - 11:45 amSAN San Diego-OPO Porto

21h 30m2 stops Dallas/Fort Worth Madrid Barajas

8:20 am - 11:58 pmOPO Porto-SAN San Diego

23h 38m2 stops Madrid Barajas Chicago O'Hare Intl

$741Iberia

Sun, Nov 15 - Wed, Nov 18

3:10 pm - 10:00 pmSFO San Francisco-OPO Porto

22h 50m1 stop Paris Charles de Gaulle

5:00 am - 11:45 amOPO Porto-SFO San Francisco

14h 45m1 stop Amsterdam Schiphol

$743KLM

Tue, Jan 12 - Wed, Jan 27

2:05 pm - 3:25 pmSAN San Diego-OPO Porto

17h 20m1 stop Amsterdam Schiphol

5:00 am - 12:10 pmOPO Porto-SAN San Diego

15h 10m1 stop Amsterdam Schiphol

$747KLM

Tue, Jan 5 - Thu, Jan 14

7:00 am - 7:40 amONT Ontario-OPO Porto

16h 40m2 stops Dallas/Fort Worth Madrid Barajas

8:40 pm - 9:40 amOPO Porto-ONT Ontario

21h 00m2 stops Madrid Barajas Dallas/Fort Worth

$834Iberia

Sun, Nov 22 - Fri, Dec 4

Cheap last minute flights

Enter your travel dates to find the best prices.

4:40 pm - 3:15 pmLAX Los Angeles Los Angeles-OPO Porto

14h 35m1 stop Lisbon Humberto Delgado

5:05 am - 1:30 pmOPO Porto-LAX Los Angeles Los Angeles

16h 25m1 stop Lisbon Humberto Delgado

$863TAP AIR PORTUGAL

Sun, Aug 16 - Sun, Aug 30

4:40 pm - 8:35 pmLAX Los Angeles Los Angeles-OPO Porto

19h 55m1 stop Lisbon Humberto Delgado

6:00 am - 1:30 pmOPO Porto-LAX Los Angeles Los Angeles

15h 30m1 stop Lisbon Humberto Delgado

$863TAP AIR PORTUGAL

Sun, Aug 16 - Sun, Aug 30

5:30 pm - 11:25 pmLAX Los Angeles Los Angeles-OPO Porto

21h 55m1 stop Munich Franz Josef Strauss

6:00 am - 8:18 pmOPO Porto-LAX Los Angeles Los Angeles

22h 18m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

$864Lufthansa

Sun, Aug 16 - Wed, Aug 26

6:40 pm - 10:50 pmLAX Los Angeles Los Angeles-OPO Porto

20h 10m1 stop Frankfurt am Main

12:50 pm - 4:30 pmOPO Porto-LAX Los Angeles Los Angeles

35h 40m1 stop Zurich

$865Multiple Airlines

Tue, Aug 18 - Mon, Sep 7

3:05 pm - 3:40 pmLAX Los Angeles Los Angeles-OPO Porto

16h 35m1 stop Frankfurt am Main

6:00 am - 4:20 pmOPO Porto-LAX Los Angeles Los Angeles

18h 20m1 stop Frankfurt am Main

$867Lufthansa

Mon, Aug 17 - Tue, Sep 8

8:55 pm - 11:50 pmLAX Los Angeles Los Angeles-OPO Porto

18h 55m1 stop Barcelona-El Prat

7:15 am - 8:20 amOPO Porto-LAX Los Angeles Los Angeles

33h 05m2 stops Barcelona-El Prat Casablanca Mohamed V

$871Multiple Airlines

Mon, Aug 17 - Thu, Sep 10

5:50 pm - 8:00 pmLAX Los Angeles Los Angeles-OPO Porto

18h 10m1 stop Madrid Barajas

12:25 pm - 10:47 pmOPO Porto-LAX Los Angeles Los Angeles

18h 22m2 stops Madrid Barajas Dallas/Fort Worth

$899Iberia

Sun, Aug 16 - Wed, Aug 26

7:35 pm - 1:45 pmLAX Los Angeles Los Angeles-OPO Porto

34h 10m2 stops Zurich Geneva Geneve-Cointrin

12:50 pm - 4:30 pmOPO Porto-LAX Los Angeles Los Angeles

35h 40m1 stop Zurich

$899SWISS

Mon, Aug 17 - Mon, Sep 7

7:35 pm - 1:45 pmLAX Los Angeles Los Angeles-OPO Porto

34h 10m2 stops Zurich Geneva Geneve-Cointrin

12:15 pm - 4:30 pmOPO Porto-LAX Los Angeles Los Angeles

36h 15m1 stop Zurich

$910SWISS

Mon, Aug 17 - Tue, Sep 8

1:20 pm - 8:00 pmLAX Los Angeles Los Angeles-OPO Porto

22h 40m2 stops Chicago O'Hare Intl Madrid Barajas

4:40 pm - 11:45 amOPO Porto-LAX Los Angeles Los Angeles

27h 05m2 stops Madrid Barajas London Heathrow

$1,246Iberia

Sun, Aug 16 - Mon, Aug 24

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Lufthansa flights from California to Porto

Our best Lufthansa deals on California to Porto flight tickets

Lufthansa

Jan 17

SMF8:50 amSacramento Intl

20h 00m

2 stops

OPO12:50 pmPorto

Jan 22

OPO6:00 amPorto

24h 41m

2 stops

SMF10:41 pmSacramento Intl

$731

Lufthansa

Jan 17

SFO2:45 pmSan Francisco

16h 35m

1 stop

OPO3:20 pmPorto

Jan 22

OPO6:15 amPorto

21h 20m

1 stop

SFO7:35 pmSan Francisco

$736

Lufthansa

Jan 17

SMF8:50 amSacramento Intl

20h 00m

2 stops

OPO12:50 pmPorto

Jan 21

OPO6:00 amPorto

17h 21m

2 stops

SMF3:21 pmSacramento Intl

$743

Air Canada flights from California to Porto

Our best Air Canada deals on California to Porto flight tickets

Air Canada

Jan 18

SFO8:25 amSan Francisco

19h 40m

2 stops

OPO12:05 pmPorto

Jan 21

OPO6:00 amPorto

39h 51m

2 stops

SFO1:51 pmSan Francisco

$749

Air Canada

Oct 5

SNA1:15 pmSanta Ana J. Wayne/Orange Cnty

33h 45m

2 stops

OPO7:00 amPorto

Oct 14

OPO11:20 amPorto

34h 43m

2 stops

SNA2:03 pmSanta Ana J. Wayne/Orange Cnty

$849

Air Canada

Oct 4

LAX11:35 pmLos Angeles Los Angeles

23h 25m

2 stops

OPO7:00 amPorto

Oct 14

OPO11:20 amPorto

18h 11m

1 stop

LAX9:31 pmLos Angeles Los Angeles

$867

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 1/12

8:25 am-12:05 pm

2 stops19h 40m

Porto

Wed 1/27

12:05 pm-4:30 pm

1 stop36h 25m

$718

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 1/17

7:25 pm-11:15 am

1 stop31h 50m

Porto

Fri 1/22

6:00 am-10:57 pm

2 stops24h 57m

$718

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 2/1

7:25 pm-11:15 am

1 stop31h 50m

Porto

Thu 2/11

12:05 pm-4:30 pm

1 stop36h 25m

$725

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 1/19

7:25 pm-11:15 am

1 stop31h 50m

Porto

Tue 2/2

12:05 pm-4:30 pm

1 stop36h 25m

$725

SacramentoPorto

SMF Sacramento Intl - OPO Porto

SMFOPO

Sacramento Intl

Sun 1/17

8:50 am-12:50 pm

2 stops20h 00m

Porto

Fri 1/22

6:00 am-10:41 pm

2 stops24h 41m

$731

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sun 1/17

2:45 pm-3:20 pm

1 stop16h 35m

Porto

Fri 1/22

6:15 am-7:35 pm

1 stop21h 20m

$736

San DiegoPorto

SAN San Diego - OPO Porto

SANOPO

San Diego

Sun 11/15

6:15 am-11:45 am

2 stops21h 30m

Porto

Wed 11/18

8:20 am-11:58 pm

2 stops23h 38m

$741

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 1/12

3:10 pm-10:00 pm

1 stop22h 50m

Porto

Wed 1/27

5:00 am-11:45 am

1 stop14h 45m

$743

Quickest round-trip

San DiegoPorto

SAN San Diego - OPO Porto

SANOPO

San Diego

Tue 1/5

2:05 pm-3:25 pm

1 stop17h 20m

Porto

Thu 1/14

5:00 am-12:10 pm

1 stop15h 10m

$747

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Sun 11/22

7:00 am-7:40 am

2 stops16h 40m

Porto

Fri 12/4

8:40 pm-9:40 am

2 stops21h 00m

$834

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 $635. 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 $864 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 10% 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	12h 52m
Direct flights	None

The fastest flight from California to Porto takes 12h 52m

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 August 2026, there are 11 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 2,365 reviews	Search TAP AIR PORTUGAL flights
KLM	PriceFrom $476	Free Cancellation	Rating 7.8 1,557 reviews	Search KLM flights
Scandinavian Airlines	PriceFrom $480	Free Cancellation	Rating 7.4 1,950 reviews	Search Scandinavian Airlines flights
Delta	PriceFrom $533	Free Cancellation	Rating 7.8 8,503 reviews	Search Delta flights
Lufthansa	PriceFrom $544	Free Cancellation	Rating 6.8 8,186 reviews	Search Lufthansa flights
Iberia	PriceFrom $545	Free Cancellation	Rating 7.0 3,261 reviews	Search Iberia flights
United Airlines	PriceFrom $562	Free Cancellation	Rating 7.4 10,113 reviews	Search United Airlines flights
SWISS	PriceFrom $623	Free Cancellation	Rating 7.5 2,035 reviews	Search SWISS flights
Turkish Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 4,482 reviews	Search Turkish Airlines flights
Air Canada	PriceFrom $830	Free Cancellation	Rating 7.1 11,466 reviews	Search Air Canada flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Pinhao

Esposende

Chaves

Arcos de Valdevez

Viseu

Guimarães

Espinho

Lamego

Ponte de Lima

Mesao Frio

Penafiel

Caminha

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

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.

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Cheap flights from California to Porto from $313

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to Porto departing on 10/20. 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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Lufthansa flights from California to Porto

Our best Lufthansa deals on California to Porto flight tickets

Air Canada flights from California to Porto

Our best Air Canada deals on California to Porto flight tickets

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See travel insights to Porto from

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

Fastest flight time

Direct flights

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

Airports servicing Portugal

Fly your favorite airline to Porto

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Porto

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

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

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