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 36% 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.

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

United Airlines, Iberia, and British Airways 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 Los Angeles to Porto, which will take roughly 13h 15m. Keep in mind that layovers or delays could extend your travel time.

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 September 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.

$270 Cheap Flights from California to Porto in 2026/27

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.

5:25 pm - 8:00 pmSFO San Francisco-OPO Porto

18h 35m2 stops London Heathrow Madrid Barajas

8:20 am - 9:57 pmOPO Porto-SFO San Francisco

21h 37m2 stops Madrid Barajas Chicago O'Hare Intl

$596Iberia

Mon, Jan 11 - Fri, Jan 29

10:04 am - 11:45 amSAN San Diego-OPO Porto

17h 41m2 stops Chicago O'Hare Intl Madrid Barajas

8:20 am - 7:28 pmOPO Porto-SAN San Diego

19h 08m2 stops Madrid Barajas Chicago O'Hare Intl

$597Iberia

Wed, Feb 10 - Wed, Feb 17

11:10 am - 7:00 amSFO San Francisco-OPO Porto

35h 50m1 stop Montreal Pierre Elliott Trudeau Intl

1:45 pm - 7:35 pmOPO Porto-SFO San Francisco

37h 50m1 stop Munich Franz Josef Strauss

$597Multiple Airlines

Mon, Oct 19 - Wed, Nov 4

10:59 pm - 11:45 amSMF Sacramento Intl-OPO Porto

28h 46m2 stops Chicago O'Hare Intl Madrid Barajas

8:20 am - 12:22 amOPO Porto-SMF Sacramento Intl

24h 02m2 stops Madrid Barajas Chicago O'Hare Intl

$601American Airlines

Sat, Nov 7 - Fri, Nov 20

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

$607SWISS

Mon, Nov 2 - Tue, Nov 17

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

$608SWISS

Mon, Nov 2 - Tue, Nov 17

7:00 am - 8:15 amSFO San Francisco-OPO Porto

17h 15m1 stop New York John F Kennedy Intl

11:15 am - 11:45 amOPO Porto-SFO San Francisco

32h 30m1 stop Amsterdam Schiphol

$609Delta

Wed, Nov 18 - Tue, Nov 24

7:00 am - 8:15 amSFO San Francisco-OPO Porto

17h 15m1 stop New York John F Kennedy Intl

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

14h 45m1 stop Amsterdam Schiphol

$609Delta

Wed, Nov 18 - Thu, Nov 26

6:15 am - 9:30 amSFO San Francisco-OPO Porto

19h 15m2 stops Washington, D.C. Dulles Intl Newark

12:35 pm - 11:09 pmOPO Porto-SFO San Francisco

18h 34m2 stops Newark Denver Intl

$609United Airlines

Tue, Nov 17 - Wed, Nov 25

7:00 am - 9:30 amSFO San Francisco-OPO Porto

18h 30m1 stop Newark

12:35 pm - 6:48 amOPO Porto-SFO San Francisco

26h 13m2 stops Newark Denver Intl

$609United Airlines

Tue, Nov 17 - Tue, Nov 24

Cheap last minute flights

Enter your travel dates to find the best prices.

5:55 pm - 8:00 pmSFO San Francisco-OPO Porto

18h 05m1 stop Madrid Barajas

8:40 pm - 8:56 amOPO Porto-SFO San Francisco

20h 16m2 stops Madrid Barajas Dallas/Fort Worth

$626Iberia

Tue, Sep 22 - Wed, Dec 9

8:30 am - 2:15 pmSFO San Francisco-OPO Porto

21h 45m2 stops Toronto Pearson Intl Barcelona-El Prat

10:05 pm - 8:47 pmOPO Porto-SFO San Francisco

30h 42m2 stops Barcelona-El Prat Montreal Pierre Elliott Trudeau Intl

$699Multiple Airlines

Mon, Sep 21 - Mon, Sep 28

10:20 am - 12:40 amLAX Los Angeles-OPO Porto

30h 20m3 stops Casablanca Mohamed V Milan Malpensa Lisbon Humberto Delgado

8:35 am - 8:20 amOPO Porto-LAX Los Angeles

31h 45m3 stops Barcelona-El Prat Milan Malpensa Casablanca Mohamed V

$780Multiple Airlines

Tue, Sep 22 - Thu, Oct 1

7:00 am - 9:45 amSFO San Francisco-OPO Porto

18h 45m1 stop Newark

6:00 am - 8:10 pmOPO Porto-SFO San Francisco

22h 10m1 stop Frankfurt am Main

$838Lufthansa

Tue, Sep 22 - Wed, Dec 9

7:35 pm - 11:25 amSFO San Francisco-OPO Porto

31h 50m1 stop Zurich

12:15 pm - 4:15 pmOPO Porto-SFO San Francisco

36h 00m1 stop Zurich

$845SWISS

Tue, Sep 22 - Tue, Oct 6

11:59 pm - 6:15 amSFO San Francisco-OPO Porto

22h 16m1 stop Newark

12:35 pm - 1:30 amOPO Porto-SFO San Francisco

20h 55m2 stops Newark Washington, D.C. Dulles Intl

$849United Airlines

Mon, Sep 21 - Wed, Dec 9

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

21h 55m1 stop Munich Franz Josef Strauss

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

18h 20m1 stop Frankfurt am Main

$879Lufthansa

Mon, Sep 21 - Thu, Oct 1

12:50 pm - 5:35 pmSFO San Francisco-OPO Porto

20h 45m2 stops London Heathrow Zurich

8:40 am - 4:15 pmOPO Porto-SFO San Francisco

15h 35m1 stop Zurich

$918SWISS

Tue, Sep 22 - Tue, Sep 29

8:10 pm - 10:05 pmSFO San Francisco-OPO Porto

17h 55m1 stop Paris Charles de Gaulle

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

14h 45m1 stop Amsterdam Schiphol

$933Delta

Tue, Sep 22 - Tue, Sep 29

5:30 am - 9:45 amLAX Los Angeles-OPO Porto

20h 15m2 stops Chicago O'Hare Intl Newark

6:00 am - 9:17 pmOPO Porto-LAX Los Angeles

23h 17m2 stops Frankfurt am Main Denver Intl

$979United Airlines

Mon, Sep 21 - Thu, Oct 1

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KLM flights from California to Porto

Our best KLM deals on California to Porto flight tickets

KLM

Oct 13

SFO7:00 amSan Francisco

19h 30m

1 stop

OPO10:30 amPorto

Oct 20

OPO7:00 pmPorto

24h 45m

1 stop

SFO11:45 amSan Francisco

$629

KLM

Nov 9

SFO7:00 amSan Francisco

19h 30m

2 stops

OPO10:30 amPorto

Nov 16

OPO4:10 pmPorto

27h 35m

1 stop

SFO11:45 amSan Francisco

$640

KLM

Nov 2

SFO1:50 pmSan Francisco

17h 35m

1 stop

OPO3:25 pmPorto

Nov 17

OPO5:00 amPorto

19h 14m

2 stops

SFO4:14 pmSan Francisco

$641

Air France flights from California to Porto

Our best Air France deals on California to Porto flight tickets

Air France

Nov 1

SAN7:20 amSan Diego

16h 55m

1 stop

OPO8:15 amPorto

Dec 14

OPO10:15 amPorto

21h 43m

1 stop

SAN11:58 pmSan Diego

$654

Air France

Oct 14

SMF2:17 pmSacramento Intl

23h 43m

2 stops

OPO10:00 pmPorto

Oct 28

OPO11:30 amPorto

39h 56m

2 stops

SMF8:26 pmSacramento Intl

$697

Air France

Sep 29

SMF6:00 amSacramento Intl

20h 30m

2 stops

OPO10:30 amPorto

Oct 6

OPO6:15 amPorto

22h 11m

2 stops

SMF8:26 pmSacramento Intl

$717

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 1/11

5:25 pm-8:00 pm

2 stops18h 35m

Porto

Fri 1/29

8:20 am-9:57 pm

2 stops21h 37m

$596

San DiegoPorto

SAN San Diego - OPO Porto

SANOPO

San Diego

Wed 2/10

10:04 am-11:45 am

2 stops17h 41m

Porto

Wed 2/17

8:20 am-7:28 pm

2 stops19h 08m

$597

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 10/19

11:10 am-7:00 am

1 stop35h 50m

Porto

Wed 11/4

1:45 pm-7:35 pm

1 stop37h 50m

$597

SacramentoPorto

SMF Sacramento Intl - OPO Porto

SMFOPO

Sacramento Intl

Sat 11/7

10:59 pm-11:45 am

2 stops28h 46m

Porto

Fri 11/20

8:20 am-12:22 am

2 stops24h 02m

$601

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 11/2

7:25 pm-11:15 am

1 stop31h 50m

Porto

Tue 11/17

12:05 pm-4:30 pm

1 stop36h 25m

$607

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 11/2

7:25 pm-11:15 am

1 stop31h 50m

Porto

Tue 11/17

12:05 pm-4:30 pm

1 stop36h 25m

$608

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 11/18

7:00 am-8:15 am

1 stop17h 15m

Porto

Tue 11/24

11:15 am-11:45 am

1 stop32h 30m

$609

Quickest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 11/18

7:00 am-8:15 am

1 stop17h 15m

Porto

Thu 11/26

5:00 am-11:45 am

1 stop14h 45m

$609

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 11/17

6:15 am-9:30 am

2 stops19h 15m

Porto

Wed 11/25

12:35 pm-11:09 pm

2 stops18h 34m

$609

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 11/17

7:00 am-9:30 am

1 stop18h 30m

Porto

Tue 11/24

12:35 pm-6:48 am

2 stops26h 13m

$609

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 $855 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 $781 on momondo.

Cheap California to Porto flight deals and tips

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

Best Price Found	$270
Fastest flight time	13h 05m
Direct flights	None

The best one-way flight to Porto from California in the past 72 hours is $270. The best round-trip flight deal from California to Porto found on momondo in the last 72 hours is $596.

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 September 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 2,383 reviews	Search TAP AIR PORTUGAL flights
Scandinavian Airlines	PriceFrom $460	Free Cancellation	Rating 7.4 1,984 reviews	Search Scandinavian Airlines flights
KLM	PriceFrom $476	Free Cancellation	Rating 7.8 1,578 reviews	Search KLM flights
Delta	PriceFrom $533	Free Cancellation	Rating 7.8 8,588 reviews	Search Delta flights
Lufthansa	PriceFrom $544	Free Cancellation	Rating 6.8 8,231 reviews	Search Lufthansa flights
United Airlines	PriceFrom $562	Free Cancellation	Rating 7.4 10,224 reviews	Search United Airlines flights
SWISS	PriceFrom $623	Free Cancellation	Rating 7.5 2,074 reviews	Search SWISS flights
Turkish Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 4,464 reviews	Search Turkish Airlines flights
Iberia	PriceFrom $681	Free Cancellation	Rating 7.0 3,249 reviews	Search Iberia flights
Air Canada	PriceFrom $830	Free Cancellation	Rating 7.1 11,649 reviews	Search Air Canada flights

Coimbra

Vila Nova de Gaia

Aveiro

Braga

Pinhao

Matosinhos

Esposende

Chaves

Viseu

Arcos de Valdevez

Espinho

Guimarães

Lamego

Ponte de Lima

Penafiel

Caminha

Baiao

Mira

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 $270

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 10/19. 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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KLM flights from California to Porto

Our best KLM deals on California to Porto flight tickets

Air France flights from California to Porto

Our best Air France 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?

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

Best Price Found

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.

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

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