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

United Airlines, Delta, and Lufthansa 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 Los Angeles and flying into Porto (one of the most popular routes), then the duration is 13h 15m on average. Another popular route from California to Porto is flying from San Francisco to Porto, which will take roughly 14h 30m. 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 34% 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.

$266 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.

4:45 pm - 5:00 pmSFO San Francisco-OPO Porto

16h 15m1 stop Kastrup Copenhagen

11:55 am - 2:50 pmOPO Porto-SFO San Francisco

34h 55m1 stop Kastrup Copenhagen

$653Scandinavian Airlines

Wed, Nov 18 - Mon, Nov 30

4:30 pm - 8:00 amSFO San Francisco-OPO Porto

31h 30m3 stops Frankfurt am Main Milan Malpensa Barcelona-El Prat

8:20 pm - 2:30 pmOPO Porto-SFO San Francisco

26h 10m2 stops Milan Malpensa Frankfurt am Main

$711Multiple Airlines

Thu, Oct 15 - Thu, Oct 22

9:40 pm - 11:55 pmSFO San Francisco-OPO Porto

18h 15m1 stop Munich Franz Josef Strauss

6:00 am - 8:32 pmOPO Porto-SFO San Francisco

22h 32m2 stops Frankfurt am Main Vancouver Intl

$722Multiple Airlines

Wed, Feb 10 - Wed, Feb 17

4:45 pm - 11:00 amSFO San Francisco-OPO Porto

34h 15m1 stop Kastrup Copenhagen

5:50 pm - 3:50 pmOPO Porto-SFO San Francisco

29h 00m1 stop Kastrup Copenhagen

$728Scandinavian Airlines

Mon, Oct 12 - Thu, Oct 29

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

$735Lufthansa

Wed, Nov 18 - Fri, Nov 27

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

$740SWISS

Tue, Dec 1 - Thu, Dec 10

10:55 pm - 9:30 amSFO San Francisco-OPO Porto

26h 35m2 stops Washington, D.C. Dulles Intl Newark

6:00 am - 4:05 pmOPO Porto-SFO San Francisco

18h 05m1 stop Frankfurt am Main

$745United Airlines

Mon, Dec 7 - Fri, Dec 11

10:55 pm - 9:30 amSFO San Francisco-OPO Porto

26h 35m2 stops Washington, D.C. Dulles Intl Newark

6:00 am - 4:05 pmOPO Porto-SFO San Francisco

18h 05m1 stop Frankfurt am Main

$746United Airlines

Mon, Dec 7 - Fri, Dec 11

11:30 am - 11:15 amLAX Los Angeles-OPO Porto

39h 45m2 stops Newark Zurich

4:10 pm - 4:35 pmOPO Porto-LAX Los Angeles

56h 25m2 stops Geneva Geneve-Cointrin Zurich

$788SWISS

Tue, Feb 9 - Sun, Feb 14

9:40 pm - 11:55 pmSFO San Francisco-OPO Porto

18h 15m1 stop Munich Franz Josef Strauss

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

21h 20m1 stop Munich Franz Josef Strauss

$789Lufthansa

Sat, Feb 13 - Fri, Feb 19

Cheap last minute flights

Enter your travel dates to find the best prices.

4:30 pm - 6:55 pmSFO San Francisco-OPO Porto

18h 25m1 stop Lisbon Humberto Delgado

5:05 am - 2:35 pmOPO Porto-SFO San Francisco

17h 30m1 stop Lisbon Humberto Delgado

$883TAP AIR PORTUGAL

Thu, Aug 20 - Wed, Sep 2

4:30 pm - 8:25 pmSFO San Francisco-OPO Porto

19h 55m1 stop Lisbon Humberto Delgado

7:00 am - 2:35 pmOPO Porto-SFO San Francisco

15h 35m1 stop Lisbon Humberto Delgado

$883TAP AIR PORTUGAL

Thu, Aug 20 - Wed, Sep 2

11:39 pm - 7:00 amSFO San Francisco-OPO Porto

23h 21m1 stop Montreal Pierre Elliott Trudeau Intl

11:20 am - 1:11 pmOPO Porto-SFO San Francisco

33h 51m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$989Air Canada

Thu, Aug 20 - Wed, Sep 2

6:00 am - 9:45 amSFO San Francisco-OPO Porto

19h 45m1 stop Newark

11:20 am - 1:11 pmOPO Porto-SFO San Francisco

33h 51m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$990United Airlines

Thu, Aug 20 - Wed, Sep 2

7:00 am - 8:30 amSFO San Francisco-OPO Porto

17h 30m2 stops Boston Logan Intl Paris Charles de Gaulle

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

14h 45m1 stop Amsterdam Schiphol

$997Delta

Thu, Aug 20 - Wed, Sep 2

2:36 pm - 6:15 pmSFO San Francisco-OPO Porto

19h 39m2 stops Los Angeles Paris Charles de Gaulle

5:00 am - 3:50 pmOPO Porto-SFO San Francisco

18h 50m2 stops Amsterdam Schiphol Los Angeles

$1,007Delta

Thu, Aug 20 - Wed, Sep 2

10:35 pm - 6:55 amSFO San Francisco-OPO Porto

24h 20m1 stop Newark

12:50 pm - 4:15 pmOPO Porto-SFO San Francisco

35h 25m1 stop Zurich

$1,044Multiple Airlines

Sat, Aug 22 - Mon, Aug 31

9:13 pm - 6:55 amSFO San Francisco-OPO Porto

25h 42m2 stops Denver Intl Newark

12:50 pm - 4:15 pmOPO Porto-SFO San Francisco

35h 25m1 stop Zurich

$1,054Multiple Airlines

Sat, Aug 22 - Mon, Aug 31

11:59 pm - 6:55 amSFO San Francisco-OPO Porto

22h 56m1 stop Newark

8:55 am - 8:19 pmOPO Porto-SFO San Francisco

19h 24m1 stop Newark

$1,061United Airlines

Sat, Aug 22 - Wed, Sep 9

2:35 pm - 7:00 amLAX Los Angeles-OPO Porto

32h 25m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

12:15 pm - 1:17 pmOPO Porto-LAX Los Angeles

33h 02m2 stops Montreal Pierre Elliott Trudeau Intl Denver Intl

$1,068Air Canada

Mon, Aug 24 - Tue, Sep 1

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Lufthansa flights from California to Porto

Our best Lufthansa deals on California to Porto flight tickets

Lufthansa

Nov 18

SFO2:45 pmSan Francisco

16h 35m

1 stop

OPO3:20 pmPorto

Nov 27

OPO6:15 amPorto

21h 20m

1 stop

SFO7:35 pmSan Francisco

$735

Lufthansa

Feb 13

SFO9:40 pmSan Francisco

18h 15m

1 stop

OPO11:55 pmPorto

Feb 19

OPO6:15 amPorto

21h 20m

1 stop

SFO7:35 pmSan Francisco

$789

Lufthansa

Nov 19

SFO9:40 pmSan Francisco

18h 15m

1 stop

OPO11:55 pmPorto

Nov 27

OPO6:15 amPorto

21h 20m

1 stop

SFO7:35 pmSan Francisco

$801

SWISS flights from California to Porto

Our best SWISS deals on California to Porto flight tickets

SWISS

Dec 1

SFO7:25 pmSan Francisco

31h 50m

1 stop

OPO11:15 amPorto

Dec 10

OPO12:05 pmPorto

36h 25m

1 stop

SFO4:30 pmSan Francisco

$740

SWISS

Feb 6

LAX7:10 pmLos Angeles

32h 05m

1 stop

OPO11:15 amPorto

Feb 16

OPO12:05 pmPorto

36h 30m

1 stop

LAX4:35 pmLos Angeles

$792

SWISS

Feb 10

LAX7:10 pmLos Angeles

32h 05m

1 stop

OPO11:15 amPorto

Feb 13

OPO3:55 pmPorto

32h 40m

2 stops

LAX4:35 pmLos Angeles

$826

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 11/18

4:45 pm-5:00 pm

1 stop16h 15m

Porto

Mon 11/30

11:55 am-2:50 pm

1 stop34h 55m

$653

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Thu 10/15

4:30 pm-8:00 am

3 stops31h 30m

Porto

Thu 10/22

8:20 pm-2:30 pm

2 stops26h 10m

$711

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 2/10

9:40 pm-11:55 pm

1 stop18h 15m

Porto

Wed 2/17

6:00 am-8:32 pm

2 stops22h 32m

$722

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 10/12

4:45 pm-11:00 am

1 stop34h 15m

Porto

Thu 10/29

5:50 pm-3:50 pm

1 stop29h 00m

$728

Quickest round-trip

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Wed 11/18

2:45 pm-3:20 pm

1 stop16h 35m

Porto

Fri 11/27

6:15 am-7:35 pm

1 stop21h 20m

$735

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Tue 12/1

7:25 pm-11:15 am

1 stop31h 50m

Porto

Thu 12/10

12:05 pm-4:30 pm

1 stop36h 25m

$740

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 12/7

10:55 pm-9:30 am

2 stops26h 35m

Porto

Fri 12/11

6:00 am-4:05 pm

1 stop18h 05m

$745

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Mon 12/7

10:55 pm-9:30 am

2 stops26h 35m

Porto

Fri 12/11

6:00 am-4:05 pm

1 stop18h 05m

$746

Los AngelesPorto

LAX Los Angeles - OPO Porto

LAXOPO

Los Angeles

Tue 2/9

11:30 am-11:15 am

2 stops39h 45m

Porto

Sun 2/14

4:10 pm-4:35 pm

2 stops56h 25m

$788

San FranciscoPorto

SFO San Francisco - OPO Porto

SFOOPO

San Francisco

Sat 2/13

9:40 pm-11:55 pm

1 stop18h 15m

Porto

Fri 2/19

6:15 am-7:35 pm

1 stop21h 20m

$789

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 $866 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 3% 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

Best Price Found	$266
Fastest flight time	13h 15m
Direct flights	None

The best one-way flight to Porto from California in the past 72 hours is $266. The best round-trip flight deal from California to Porto found on momondo in the last 72 hours is $653.

The fastest flight from California to Porto takes 13h 15m

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 2,371 reviews	Search TAP AIR PORTUGAL flights
KLM	PriceFrom $476	Free Cancellation	Rating 7.8 1,560 reviews	Search KLM flights
Scandinavian Airlines	PriceFrom $480	Free Cancellation	Rating 7.4 1,952 reviews	Search Scandinavian Airlines flights
Delta	PriceFrom $533	Free Cancellation	Rating 7.8 8,500 reviews	Search Delta flights
Lufthansa	PriceFrom $544	Free Cancellation	Rating 6.8 8,202 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 10,104 reviews	Search United Airlines flights
SWISS	PriceFrom $623	Free Cancellation	Rating 7.5 2,039 reviews	Search SWISS flights
Turkish Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 4,477 reviews	Search Turkish Airlines flights
Air Canada	PriceFrom $830	Free Cancellation	Rating 7.1 11,505 reviews	Search Air Canada flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Pinhao

Matosinhos

Esposende

Chaves

Arcos de Valdevez

Viseu

Espinho

Guimarães

Lamego

Ponte de Lima

Mesao Frio

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

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 $266

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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Lufthansa flights from California to Porto

Our best Lufthansa deals on California to Porto flight tickets

SWISS flights from California to Porto

Our best SWISS deals on California to Porto flight tickets

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Use the filters below to find and compare flights from California to Porto that are best for you.

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

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.

Popular cities in Portugal

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

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