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

LEVEL, TAP AIR PORTUGAL, and Scandinavian Airlines 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 30m on average. Another popular route from California to Porto is flying from San Francisco to Porto, which will take roughly 13h 45m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Porto?

United Airlines, TAP AIR PORTUGAL and SWISS 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 43% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 15 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 September 2025, there are 15 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.

$232 Cheap Flights from California to Porto in 2025/26

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Find the cheapest flights from California to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

4:40 pm - 4:55 pmSFO-OPO

16h 15m1 stop

5:35 pm - 3:35 pmOPO-SFO

29h 00m1 stop

$468Scandinavian Airlines

Find Deal

Thu, Mar 5 - Mon, Mar 9

6:57 pm - 4:55 pmLAX-OPO

37h 58m2 stops

5:35 pm - 5:00 pmOPO-LAX

31h 25m1 stop

$470Scandinavian Airlines

Find Deal

Wed, Nov 12 - Mon, Nov 24

8:30 am - 3:00 pmSFO-OPO

22h 30m2 stops

10:50 pm - 7:51 pmOPO-SFO

29h 01m2 stops

$489Multiple Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

8:30 am - 3:00 pmSFO-OPO

22h 30m2 stops

10:50 pm - 7:51 pmOPO-SFO

29h 01m2 stops

$490Multiple Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

4:40 pm - 5:00 pmLAX-OPO

16h 20m1 stop

6:55 am - 4:00 pmOPO-LAX

16h 05m1 stop

$525TAP AIR PORTUGAL

Find Deal

Sat, Oct 18 - Sat, Nov 1

5:45 pm - 6:00 pmLAX-OPO

17h 15m1 stop

6:00 pm - 2:40 pmOPO-LAX

28h 40m1 stop

$526TAP AIR PORTUGAL

Find Deal

Tue, Oct 28 - Wed, Nov 5

1:00 pm - 9:30 amSFO-OPO

13h 30m1 stop

12:30 pm - 9:00 pmOPO-SFO

15h 30m1 stop

$526United Airlines

Find Deal

Wed, Mar 11 - Wed, Mar 18

5:30 am - 9:30 amSFO-OPO

21h 00m2 stops

6:00 am - 9:00 pmOPO-SFO

22h 00m1 stop

$529United Airlines

Find Deal

Wed, Mar 11 - Wed, Mar 18

7:25 pm - 6:30 pmSFO-OPO

15h 05m1 stop

12:05 pm - 4:30 pmOPO-SFO

36h 25m1 stop

$551SWISS

Find Deal

Sun, Dec 7 - Tue, Dec 16

7:25 pm - 6:35 pmSFO-OPO

15h 10m1 stop

12:05 pm - 4:30 pmOPO-SFO

36h 25m1 stop

$558SWISS

Find Deal

Wed, Dec 10 - Tue, Jan 13

United Airlines flights from California to Porto

Our best United Airlines deals on California to Porto flight tickets

United Airlines

Mar 11

SFO1:00 pmSan Francisco

13h 30m

1 stop

OPO9:30 amPorto

Mar 18

OPO12:30 pmPorto

15h 30m

1 stop

SFO9:00 pmSan Francisco

$526

Find similar

United Airlines

Mar 11

SFO5:30 amSan Francisco

21h 00m

2 stops

OPO9:30 amPorto

Mar 18

OPO6:00 amPorto

22h 00m

1 stop

SFO9:00 pmSan Francisco

$529

Find similar

United Airlines

Mar 3

SFO10:35 amSan Francisco

14h 55m

1 stop

OPO9:30 amPorto

Mar 18

OPO12:30 pmPorto

15h 30m

1 stop

SFO9:00 pmSan Francisco

$530

Find similar

KLM flights from California to Porto

Our best KLM deals on California to Porto flight tickets

KLM

Sep 22

SJC1:31 pmSan Jose

17h 59m

2 stops

OPO3:30 pmPorto

Oct 3

OPO9:20 amPorto

21h 30m

2 stops

SJC10:50 pmSan Jose

$678

Find similar

KLM

Feb 15

ONT6:00 amOntario

20h 30m

2 stops

OPO10:30 amPorto

Mar 15

OPO11:25 amPorto

35h 54m

2 stops

ONT4:19 pmOntario

$715

Find similar

KLM

Sep 30

SAN1:55 pmSan Diego

24h 20m

1 stop

OPO10:15 pmPorto

Oct 18

OPO4:20 pmPorto

27h 40m

1 stop

SAN12:00 pmSan Diego

$783

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 3/5

4:40 pm-4:55 pm

1 stop16h 15m

Porto

Mon 3/9

5:35 pm-3:35 pm

1 stop29h 00m

$468

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 11/12

6:57 pm-4:55 pm

2 stops37h 58m

Porto

Mon 11/24

5:35 pm-5:00 pm

1 stop31h 25m

$470

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 10/14

8:30 am-3:00 pm

2 stops22h 30m

Porto

Tue 10/21

10:50 pm-7:51 pm

2 stops29h 01m

$489

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 10/14

8:30 am-3:00 pm

2 stops22h 30m

Porto

Tue 10/21

10:50 pm-7:51 pm

2 stops29h 01m

$490

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 10/18

4:40 pm-5:00 pm

1 stop16h 20m

Porto

Sat 11/1

6:55 am-4:00 pm

1 stop16h 05m

$525

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 10/28

5:45 pm-6:00 pm

1 stop17h 15m

Porto

Wed 11/5

6:00 pm-2:40 pm

1 stop28h 40m

$526

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 3/11

1:00 pm-9:30 am

1 stop13h 30m

Porto

Wed 3/18

12:30 pm-9:00 pm

1 stop15h 30m

$526

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 3/11

5:30 am-9:30 am

2 stops21h 00m

Porto

Wed 3/18

6:00 am-9:00 pm

1 stop22h 00m

$529

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 12/7

7:25 pm-6:30 pm

1 stop15h 05m

Porto

Tue 12/16

12:05 pm-4:30 pm

1 stop36h 25m

$551

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Wed 12/10

7:25 pm-6:35 pm

1 stop15h 10m

Porto

Tue 1/13

12:05 pm-4:30 pm

1 stop36h 25m

$558

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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 $666. If you aren’t able to travel during the month of February, then book flights to Porto from California during November instead. Flights to Porto in November, while not as cheap as those in February, still average around $722.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Wednesday when prices can be found for as low as $942. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,197. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the evening is the cheapest time of day to fly from California to Porto when you can find flight prices for as low as $954. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,172 on average. Flights to Porto from California in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight 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 $927 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 $770 on momondo.

Can stopping save me money on California to Porto flights?

You could potentially save up to 16% 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

Direct flights	None

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

Search flight deals

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 2025, there are 15 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
LEVEL	PriceFrom $402	Free Cancellation	Rating 4.0 4 reviews	Search LEVEL flights
Iberia	PriceFrom $540	Free Cancellation	Rating 7.0 2,925 reviews	Search Iberia flights
TAP AIR PORTUGAL	PriceFrom $572	Free Cancellation	Rating 7.1 1,977 reviews	Search TAP AIR PORTUGAL flights
American Airlines	PriceFrom $574	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
SWISS	PriceFrom $610	Free Cancellation	Rating 7.6 1,737 reviews	Search SWISS flights
United Airlines	PriceFrom $615	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Scandinavian Airlines	PriceFrom $624	Free Cancellation	Rating 7.4 1,486 reviews	Search Scandinavian Airlines flights
Vueling	PriceFrom $625	Free Cancellation	Rating 7.1 1,185 reviews	Search Vueling flights
British Airways	PriceFrom $628	Free Cancellation	Rating 6.7 7,367 reviews	Search British Airways flights
KLM	PriceFrom $648	Free Cancellation	Rating 7.8 1,386 reviews	Search KLM flights

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Aveiro

Coimbra

Braga

Matosinhos

Caminha

Guimarães

Esposende

Lamego

Chaves

Espinho

Arcos de Valdevez

Viseu

Ponte de Lima

Pinhao

Santa Maria da Feira

Curia

Penafiel

Mesao Frio

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 $232

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 10/12. 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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Big names and deals

Filter for what you want

Filter for what you want

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Trusted and free

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Find the cheapest flights from California to Porto

Cheap round-trip flights

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United Airlines flights from California to Porto

Our best United Airlines deals on California to Porto flight tickets

KLM flights from California to Porto

Our best KLM 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.

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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

What is the cheapest month to fly to Porto?

What is the cheapest day to depart on your flight to Porto?

What is the cheapest time of day to depart on your flight to Porto?

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

Can stopping save me money on California to Porto flights?

You could potentially save up to 16% on your flight if you consider stops on a California to Porto flight.

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

LEVEL, TAP AIR PORTUGAL, and Scandinavian Airlines are the most popular carriers operating 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

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

Direct flights

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

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

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

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

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?

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

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

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

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

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