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

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.

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 14h 20m on average. Another popular route from California to Porto is flying from Los Angeles to Porto, which will take roughly 14h 55m. 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 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.

$264 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

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:10 pm - 11:15 am

LAX

OPO

32h 05m1 stop

11:55 am - 4:35 pm

OPO

LAX

36h 40m1 stop

$462SWISS

Sun, Jan 11 - Sat, Jan 24

7:10 pm - 6:35 pm

LAX

OPO

15h 25m1 stop

12:10 pm - 4:35 pm

OPO

LAX

36h 25m1 stop

$463SWISS

Sat, Jan 24 - Wed, Feb 4

7:10 pm - 11:15 am

LAX

OPO

32h 05m1 stop

6:00 am - 9:28 pm

OPO

LAX

23h 28m2 stops

$469Multiple Airlines

Sun, Jan 11 - Sat, Jan 24

8:30 am - 12:05 pm

LAX

OPO

19h 35m2 stops

1:45 pm - 3:15 pm

OPO

LAX

33h 30m1 stop

$476Multiple Airlines

Sun, Jan 25 - Sun, Feb 1

5:45 pm - 10:30 am

LAX

OPO

32h 45m1 stop

5:00 am - 11:45 am

OPO

LAX

14h 45m1 stop

$479Delta

Sat, Feb 7 - Thu, Feb 26

7:55 am - 10:30 am

LAX

OPO

18h 35m2 stops

11:15 am - 11:45 am

OPO

LAX

32h 30m1 stop

$482Delta

Mon, Feb 9 - Sun, Mar 1

3:00 pm - 10:30 am

SAN

OPO

36h 30m1 stop

11:15 am - 1:05 pm

OPO

SAN

32h 50m1 stop

$483KLM

Tue, Mar 10 - Fri, Mar 20

11:10 am - 2:45 pm

SMF

OPO

19h 35m2 stops

6:00 am - 7:39 pm

OPO

SMF

21h 39m2 stops

$490Lufthansa

Thu, Jan 22 - Mon, Jan 26

11:10 am - 12:50 pm

SAN

OPO

17h 40m2 stops

2:05 pm - 3:45 pm

OPO

SAN

33h 40m1 stop

$495Lufthansa

Thu, Feb 5 - Thu, Feb 19

11:45 am - 3:25 pm

SNA

OPO

19h 40m2 stops

4:10 pm - 8:04 pm

OPO

SNA

35h 54m2 stops

$1,137KLM

Tue, Dec 30 - Thu, Jan 8

United Airlines flights from California to Porto

Our best United Airlines deals on California to Porto flight tickets

United Airlines

Mar 3

ONT6:10 amOntario

19h 20m

2 stops

OPO9:30 amPorto

Mar 24

OPO6:00 amPorto

23h 25m

2 stops

ONT10:25 pmOntario

$490

Find similar

United Airlines

Jan 29

SMF11:10 amSacramento Intl

19h 35m

2 stops

OPO2:45 pmPorto

Feb 2

OPO6:00 amPorto

36h 24m

2 stops

SMF10:24 amSacramento Intl

$505

Find similar

United Airlines

Jan 29

SMF6:00 amSacramento Intl

24h 45m

2 stops

OPO2:45 pmPorto

Feb 2

OPO6:00 amPorto

23h 54m

2 stops

SMF9:54 pmSacramento Intl

$506

Find similar

Iberia flights from California to Porto

Our best Iberia deals on California to Porto flight tickets

Iberia

Jan 17

SAN6:20 amSan Diego

21h 25m

2 stops

OPO11:45 amPorto

Feb 1

OPO8:20 amPorto

22h 06m

2 stops

SAN10:26 pmSan Diego

$510

Find similar

Iberia

Jan 11

LAX7:55 pmLos Angeles

28h 15m

1 stop

OPO8:10 amPorto

Jan 24

OPO8:20 amPorto

20h 58m

2 stops

LAX9:18 pmLos Angeles

$512

Find similar

Iberia

Feb 7

ONT7:16 amOntario

16h 24m

2 stops

OPO7:40 amPorto

Feb 28

OPO8:40 pmPorto

25h 16m

2 stops

ONT1:56 pmOntario

$889

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 1/11

7:10 pm-11:15 am

1 stop32h 05m

Porto

Sat 1/24

11:55 am-4:35 pm

1 stop36h 40m

$462

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 1/24

7:10 pm-6:35 pm

1 stop15h 25m

Porto

Wed 2/4

12:10 pm-4:35 pm

1 stop36h 25m

$463

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 1/11

7:10 pm-11:15 am

1 stop32h 05m

Porto

Sat 1/24

6:00 am-9:28 pm

2 stops23h 28m

$469

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 1/25

8:30 am-12:05 pm

2 stops19h 35m

Porto

Sun 2/1

1:45 pm-3:15 pm

1 stop33h 30m

$476

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 2/7

5:45 pm-10:30 am

1 stop32h 45m

Porto

Thu 2/26

5:00 am-11:45 am

1 stop14h 45m

$479

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 2/9

7:55 am-10:30 am

2 stops18h 35m

Porto

Sun 3/1

11:15 am-11:45 am

1 stop32h 30m

$482

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 3/10

3:00 pm-10:30 am

1 stop36h 30m

Porto

Fri 3/20

11:15 am-1:05 pm

1 stop32h 50m

$483

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Thu 1/22

11:10 am-2:45 pm

2 stops19h 35m

Porto

Mon 1/26

6:00 am-7:39 pm

2 stops21h 39m

$490

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Thu 2/5

11:10 am-12:50 pm

2 stops17h 40m

Porto

Thu 2/19

2:05 pm-3:45 pm

1 stop33h 40m

$495

Santa AnaPorto

SNA - OPO

SNAOPO

Santa Ana J. Wayne/Orange Cnty

Tue 12/30

11:45 am-3:25 pm

2 stops19h 40m

Porto

Thu 1/8

4:10 pm-8:04 pm

2 stops35h 54m

$1,137

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 January is, on average, the cheapest month to fly to Porto from California, with most prices found around $649. If you aren’t able to travel during the month of January, then book flights to Porto from California during February instead. Flights to Porto in February, while not as cheap as those in January, still average around $666.

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 $890 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	14h 20m
Direct flights	None

The fastest flight from California to Porto takes 14h 20m

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 1,432 reviews	Search KLM flights
Scandinavian Airlines	PriceFrom $527	Free Cancellation	Rating 7.4 1,605 reviews	Search Scandinavian Airlines flights
British Airways	PriceFrom $533	Free Cancellation	Rating 6.7 7,571 reviews	Search British Airways flights
Iberia	PriceFrom $540	Free Cancellation	Rating 7.0 3,045 reviews	Search Iberia flights
SWISS	PriceFrom $567	Free Cancellation	Rating 7.5 1,810 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 7.1 2,089 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $611	Free Cancellation	Rating 6.8 7,626 reviews	Search Lufthansa flights
United Airlines	PriceFrom $615	Free Cancellation	Rating 7.4 9,094 reviews	Search United Airlines flights

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Esposende

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Pinhao

Curia

Penafiel

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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.