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

Iberia, American Airlines, and Brussels 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 San Francisco and flying into Porto (one of the most popular routes), then the duration is 14h 25m on average. Another popular route from California to Porto is flying from Los Angeles to Porto, which will take roughly 14h 45m. 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 42% 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.

$255 Cheap Flights from California to Porto in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

8:40 am - 12:05 pm

LAX

OPO

19h 25m2 stops

12:35 pm - 9:29 pm

OPO

LAX

15h 54m1 stop

$453Brussels Airlines

Wed, Mar 4 - Wed, Mar 11

7:10 pm - 11:10 am

LAX

OPO

32h 00m1 stop

12:25 pm - 4:35 pm

OPO

LAX

36h 10m1 stop

$457SWISS

Sat, Jan 17 - Fri, Jan 23

7:10 pm - 6:35 pm

LAX

OPO

15h 25m1 stop

12:30 pm - 9:10 pm

OPO

LAX

40h 40m2 stops

$459Multiple Airlines

Sat, Jan 17 - Fri, Jan 23

8:30 am - 12:05 pm

LAX

OPO

19h 35m2 stops

6:15 am - 3:15 pm

OPO

LAX

17h 00m1 stop

$460Multiple Airlines

Mon, Feb 2 - Mon, Feb 9

7:10 pm - 6:35 pm

LAX

OPO

15h 25m1 stop

12:25 pm - 4:35 pm

OPO

LAX

36h 10m1 stop

$462SWISS

Sat, Jan 17 - Fri, Jan 23

4:40 pm - 4:55 pm

SFO

OPO

16h 15m1 stop

5:35 pm - 3:35 pm

OPO

SFO

29h 00m1 stop

$470Scandinavian Airlines

Thu, Mar 5 - Mon, Mar 9

7:05 am - 10:30 am

SAN

OPO

19h 25m2 stops

11:25 am - 10:47 pm

OPO

SAN

19h 22m2 stops

$478Air France

Wed, Feb 4 - Wed, Feb 11

6:00 am - 10:30 am

SMF

OPO

20h 30m2 stops

5:00 am - 8:58 pm

OPO

SMF

23h 58m2 stops

$483Delta

Sun, Jan 18 - Sat, Jan 31

6:00 am - 10:30 am

SMF

OPO

20h 30m2 stops

5:00 am - 9:51 pm

OPO

SMF

24h 51m2 stops

$484Delta

Sun, Jan 18 - Sat, Jan 31

4:40 pm - 4:55 pm

SFO

OPO

16h 15m1 stop

5:35 pm - 10:59 pm

OPO

SFO

36h 24m2 stops

$617Scandinavian Airlines

Thu, Mar 5 - Mon, Mar 9

Brussels Airlines flights from California to Porto

Our best Brussels Airlines deals on California to Porto flight tickets

Brussels Airlines

Mar 4

LAX8:40 amLos Angeles

19h 25m

2 stops

OPO12:05 pmPorto

Mar 11

OPO12:35 pmPorto

15h 54m

1 stop

LAX9:29 pmLos Angeles

$453

Find similar

Brussels Airlines

Jan 17

LAX7:30 amLos Angeles

20h 35m

2 stops

OPO12:05 pmPorto

Jan 23

OPO12:55 pmPorto

32h 10m

2 stops

LAX1:05 pmLos Angeles

$533

Find similar

Brussels Airlines

Apr 14

LAX8:30 amLos Angeles

23h 30m

2 stops

OPO4:00 pmPorto

Apr 23

OPO12:35 pmPorto

16h 15m

1 stop

LAX8:50 pmLos Angeles

$608

Find similar

SWISS flights from California to Porto

Our best SWISS deals on California to Porto flight tickets

SWISS

Jan 17

LAX7:10 pmLos Angeles

32h 00m

1 stop

OPO11:10 amPorto

Jan 23

OPO12:25 pmPorto

36h 10m

1 stop

LAX4:35 pmLos Angeles

$457

Find similar

SWISS

Feb 11

LAX7:10 pmLos Angeles

32h 00m

1 stop

OPO11:10 amPorto

Feb 17

OPO7:25 pmPorto

29h 10m

1 stop

LAX4:35 pmLos Angeles

$463

Find similar

SWISS

Feb 2

LAX7:10 pmLos Angeles

32h 05m

1 stop

OPO11:15 amPorto

Feb 9

OPO12:05 pmPorto

36h 30m

1 stop

LAX4:35 pmLos Angeles

$469

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 3/4

8:40 am-12:05 pm

2 stops19h 25m

Porto

Wed 3/11

12:35 pm-9:29 pm

1 stop15h 54m

$453

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 1/17

7:10 pm-11:10 am

1 stop32h 00m

Porto

Fri 1/23

12:25 pm-4:35 pm

1 stop36h 10m

$457

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 1/17

7:10 pm-6:35 pm

1 stop15h 25m

Porto

Fri 1/23

12:30 pm-9:10 pm

2 stops40h 40m

$459

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 2/2

8:30 am-12:05 pm

2 stops19h 35m

Porto

Mon 2/9

6:15 am-3:15 pm

1 stop17h 00m

$460

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 1/17

7:10 pm-6:35 pm

1 stop15h 25m

Porto

Fri 1/23

12:25 pm-4:35 pm

1 stop36h 10m

$462

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

$470

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 2/4

7:05 am-10:30 am

2 stops19h 25m

Porto

Wed 2/11

11:25 am-10:47 pm

2 stops19h 22m

$478

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Sun 1/18

6:00 am-10:30 am

2 stops20h 30m

Porto

Sat 1/31

5:00 am-8:58 pm

2 stops23h 58m

$483

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Sun 1/18

6:00 am-10:30 am

2 stops20h 30m

Porto

Sat 1/31

5:00 am-9:51 pm

2 stops24h 51m

$484

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-10:59 pm

2 stops36h 24m

$617

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 $891 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 25m
Direct flights	None

The fastest flight from California to Porto takes 14h 25m

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 1,617 reviews	Search Scandinavian Airlines flights
British Airways	PriceFrom $533	Free Cancellation	Rating 6.7 7,602 reviews	Search British Airways flights
Iberia	PriceFrom $540	Free Cancellation	Rating 7.0 3,055 reviews	Search Iberia flights
SWISS	PriceFrom $567	Free Cancellation	Rating 7.5 1,817 reviews	Search SWISS flights
American Airlines	PriceFrom $574	Free Cancellation	Rating 7.2 11,053 reviews	Search American Airlines flights
TAP AIR PORTUGAL	PriceFrom $574	Free Cancellation	Rating 7.2 2,096 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $593	Free Cancellation	Rating 7.4 9,102 reviews	Search United Airlines flights
Lufthansa	PriceFrom $611	Free Cancellation	Rating 6.8 7,644 reviews	Search Lufthansa flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Guimarães

Esposende

Lamego

Chaves

Viseu

Espinho

Ponte de Lima

Arcos de Valdevez

Pinhao

Curia

Penafiel

Mesao Frio

Mira

Baiao

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.