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

United Airlines, Delta, 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 San Francisco and flying into Porto (one of the most popular routes), then the duration is 13h 50m on average. Another popular route from California to Porto is flying from Los Angeles to Porto, which will take roughly 14h 15m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Porto?

United Airlines, TAP AIR PORTUGAL and Lufthansa 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 41% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 14 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 December 2025, there are 14 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.

$260 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

Enter your travel dates to find the best prices.

3:00 pm - 2:55 pm

LAX

OPO

15h 55m1 stop

6:00 am - 9:10 pm

OPO

LAX

23h 10m2 stops

$436Lufthansa

Mon, Jan 12 - Mon, Jan 26

3:00 pm - 2:55 pm

LAX

OPO

15h 55m1 stop

1:45 pm - 3:15 pm

OPO

LAX

33h 30m1 stop

$458Lufthansa

Mon, Jan 12 - Mon, Jan 26

7:10 pm - 11:10 am

LAX

OPO

32h 00m1 stop

11:55 am - 4:35 pm

OPO

LAX

36h 40m1 stop

$461SWISS

Thu, Jan 15 - Sat, Jan 24

7:10 pm - 11:15 am

LAX

OPO

32h 05m1 stop

12:05 pm - 4:35 pm

OPO

LAX

36h 30m1 stop

$463SWISS

Mon, Jan 12 - Mon, Jan 26

7:35 am - 1:15 pm

LAX

OPO

21h 40m2 stops

11:25 am - 4:35 pm

OPO

LAX

37h 10m1 stop

$465Multiple Airlines

Wed, Feb 11 - Mon, Feb 16

10:52 am - 12:05 pm

SAN

OPO

17h 13m2 stops

6:00 am - 8:47 pm

OPO

SAN

22h 47m2 stops

$467Multiple Airlines

Sat, Jan 17 - Sun, Feb 1

9:05 pm - 10:30 am

LAX

OPO

29h 25m1 stop

5:00 am - 11:45 am

OPO

LAX

14h 45m1 stop

$480KLM

Mon, Jan 26 - Mon, Feb 2

8:45 am - 10:30 am

LAX

OPO

17h 45m2 stops

5:00 am - 11:45 am

OPO

LAX

14h 45m1 stop

$483Delta

Wed, Feb 11 - Wed, Feb 18

3:00 pm - 3:25 pm

SAN

OPO

17h 25m1 stop

11:15 am - 1:05 pm

OPO

SAN

32h 50m1 stop

$484KLM

Tue, Mar 10 - Fri, Mar 20

1:35 pm - 10:30 am

SAN

OPO

36h 55m2 stops

5:00 am - 12:05 am

OPO

SAN

27h 05m2 stops

$485Delta

Sat, Jan 17 - Sun, Feb 1

SWISS flights from California to Porto

Our best SWISS deals on California to Porto flight tickets

SWISS

Jan 15

LAX7:10 pmLos Angeles

32h 00m

1 stop

OPO11:10 amPorto

Jan 24

OPO11:55 amPorto

36h 40m

1 stop

LAX4:35 pmLos Angeles

$461

Find similar

SWISS

Jan 12

LAX7:10 pmLos Angeles

32h 05m

1 stop

OPO11:15 amPorto

Jan 26

OPO12:05 pmPorto

36h 30m

1 stop

LAX4:35 pmLos Angeles

$463

Find similar

SWISS

Mar 19

LAX1:25 pmLos Angeles

13h 05m

1 stop

OPO9:30 amPorto

Mar 24

OPO12:05 pmPorto

36h 30m

1 stop

LAX5:35 pmLos Angeles

$502

Find similar

KLM flights from California to Porto

Our best KLM deals on California to Porto flight tickets

KLM

Jan 26

LAX9:05 pmLos Angeles

29h 25m

1 stop

OPO10:30 amPorto

Feb 2

OPO5:00 amPorto

14h 45m

1 stop

LAX11:45 amLos Angeles

$480

Find similar

KLM

Mar 5

LAX1:45 pmLos Angeles

24h 40m

1 stop

OPO10:25 pmPorto

Mar 15

OPO11:15 amPorto

32h 30m

1 stop

LAX12:45 pmLos Angeles

$484

Find similar

KLM

Jan 28

ONT7:30 amOntario

27h 50m

2 stops

OPO7:20 pmPorto

Feb 4

OPO5:00 amPorto

24h 05m

2 stops

ONT9:05 pmOntario

$498

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 1/12

3:00 pm-2:55 pm

1 stop15h 55m

Porto

Mon 1/26

6:00 am-9:10 pm

2 stops23h 10m

$436

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 1/12

3:00 pm-2:55 pm

1 stop15h 55m

Porto

Mon 1/26

1:45 pm-3:15 pm

1 stop33h 30m

$458

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Thu 1/15

7:10 pm-11:10 am

1 stop32h 00m

Porto

Sat 1/24

11:55 am-4:35 pm

1 stop36h 40m

$461

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 1/12

7:10 pm-11:15 am

1 stop32h 05m

Porto

Mon 1/26

12:05 pm-4:35 pm

1 stop36h 30m

$463

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 2/11

7:35 am-1:15 pm

2 stops21h 40m

Porto

Mon 2/16

11:25 am-4:35 pm

1 stop37h 10m

$465

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 1/17

10:52 am-12:05 pm

2 stops17h 13m

Porto

Sun 2/1

6:00 am-8:47 pm

2 stops22h 47m

$467

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 1/26

9:05 pm-10:30 am

1 stop29h 25m

Porto

Mon 2/2

5:00 am-11:45 am

1 stop14h 45m

$480

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 2/11

8:45 am-10:30 am

2 stops17h 45m

Porto

Wed 2/18

5:00 am-11:45 am

1 stop14h 45m

$483

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 3/10

3:00 pm-3:25 pm

1 stop17h 25m

Porto

Fri 3/20

11:15 am-1:05 pm

1 stop32h 50m

$484

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 1/17

1:35 pm-10:30 am

2 stops36h 55m

Porto

Sun 2/1

5:00 am-12:05 am

2 stops27h 05m

$485

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 $666. 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 $671.

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 $892 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 $765 on momondo.

Can stopping save me money on California to Porto flights?

You could potentially save up to 17% 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 50m
Direct flights	None

The fastest flight from California to Porto takes 13h 50m

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 December 2025, there are 14 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 $388	Free Cancellation	Rating 0.0	Search LEVEL flights
KLM	PriceFrom $476	Free Cancellation	Rating 7.7 1,430 reviews	Search KLM flights
Scandinavian Airlines	PriceFrom $527	Free Cancellation	Rating 7.4 1,606 reviews	Search Scandinavian Airlines flights
British Airways	PriceFrom $533	Free Cancellation	Rating 6.7 7,583 reviews	Search British Airways flights
Iberia	PriceFrom $540	Free Cancellation	Rating 7.0 3,051 reviews	Search Iberia flights
SWISS	PriceFrom $567	Free Cancellation	Rating 7.5 1,814 reviews	Search SWISS flights
American Airlines	PriceFrom $574	Free Cancellation	Rating 7.2 11,049 reviews	Search American Airlines flights
TAP AIR PORTUGAL	PriceFrom $574	Free Cancellation	Rating 7.2 2,091 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $593	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights
Lufthansa	PriceFrom $611	Free Cancellation	Rating 6.8 7,632 reviews	Search Lufthansa flights

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Esposende

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Espinho

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Pinhao

Curia

Penafiel

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Mira

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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.