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Cheap flights from California to Porto from $317

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 7/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from California to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
4:45 pm - 5:00 pm
LAX
-
OPO
16h 15m
1 stop
TAP AIR PORTUGAL Logo
6:55 am - 3:00 pm
OPO
-
LAX
16h 05m
1 stop
$431TAP AIR PORTUGAL
Sat, Feb 21 - Sat, Mar 7
TAP AIR PORTUGAL Logo
7:35 pm - 7:00 pm
SFO
-
OPO
15h 25m
1 stop
TAP AIR PORTUGAL Logo
7:00 am - 2:35 pm
OPO
-
SFO
15h 35m
1 stop
$431TAP AIR PORTUGAL
Sat, Apr 4 - Tue, Apr 14
SWISS Logo
7:10 pm - 11:15 am
LAX
-
OPO
32h 05m
1 stop
SWISS Logo
7:20 pm - 4:35 pm
OPO
-
LAX
29h 15m
1 stop
$438SWISS
Sun, Feb 15 - Wed, Mar 4
SWISS Logo
7:10 pm - 6:30 pm
LAX
-
OPO
15h 20m
1 stop
SWISS Logo
7:20 pm - 4:35 pm
OPO
-
LAX
29h 15m
1 stop
$443SWISS
Tue, Feb 24 - Wed, Mar 4
Lufthansa Logo
5:35 pm - 11:40 pm
SAN
-
OPO
22h 05m
1 stop
Lufthansa Logo
6:15 am - 3:45 pm
OPO
-
SAN
17h 30m
1 stop
$482Lufthansa
Wed, Mar 4 - Sun, Mar 8
KLM Logo
1:40 pm - 6:20 pm
SAN
-
OPO
20h 40m
1 stop
KLM Logo
4:20 pm - 11:50 am
OPO
-
SAN
27h 30m
1 stop
$483KLM
Tue, Apr 14 - Mon, Apr 20
Delta Logo
10:00 pm - 10:30 am
SAN
-
OPO
28h 30m
2 stops
Delta Logo
11:15 am - 12:05 pm
OPO
-
SAN
32h 50m
1 stop
$484Delta
Mon, Feb 23 - Wed, Mar 4
Delta Logo
2:00 pm - 10:30 am
SAN
-
OPO
36h 30m
1 stop
Delta Logo
11:15 am - 1:05 pm
OPO
-
SAN
32h 50m
1 stop
$485Delta
Tue, Mar 3 - Wed, Mar 18
Lufthansa Logo
11:57 am - 11:40 pm
SAN
-
OPO
27h 43m
2 stops
Lufthansa Logo
6:15 am - 3:45 pm
OPO
-
SAN
17h 30m
1 stop
$486Lufthansa
Wed, Mar 4 - Sun, Mar 8
KLM Logo
11:58 am - 3:30 pm
SAN
-
OPO
19h 32m
2 stops
KLM Logo
11:25 am - 11:50 am
OPO
-
SAN
32h 25m
1 stop
$488KLM
Tue, Apr 14 - Mon, Apr 20

TAP AIR PORTUGAL flights from California to Porto

Our best TAP AIR PORTUGAL deals on California to Porto flight tickets
TAP AIR PORTUGAL
Feb 21
LAX4:45 pmLos Angeles
16h 15m
1 stop
OPO5:00 pmPorto
Mar 7
OPO6:55 amPorto
16h 05m
1 stop
LAX3:00 pmLos Angeles
$431
TAP AIR PORTUGAL
Mar 6
SFO7:10 pmSan Francisco
21h 20m
1 stop
OPO12:30 amPorto
Mar 14
OPO6:55 amPorto
15h 50m
1 stop
SFO3:45 pmSan Francisco
$443
TAP AIR PORTUGAL
Feb 21
LAX4:45 pmLos Angeles
33h 50m
1 stop
OPO10:35 amPorto
Feb 28
OPO6:55 amPorto
16h 05m
1 stop
LAX3:00 pmLos Angeles
$447

SWISS flights from California to Porto

Our best SWISS deals on California to Porto flight tickets
SWISS
Feb 15
LAX7:10 pmLos Angeles
32h 05m
1 stop
OPO11:15 amPorto
Mar 4
OPO7:20 pmPorto
29h 15m
1 stop
LAX4:35 pmLos Angeles
$438
SWISS
Feb 24
LAX7:10 pmLos Angeles
15h 20m
1 stop
OPO6:30 pmPorto
Mar 4
OPO7:20 pmPorto
29h 15m
1 stop
LAX4:35 pmLos Angeles
$443
SWISS
Mar 9
LAX8:10 pmLos Angeles
32h 05m
1 stop
OPO11:15 amPorto
Mar 23
OPO7:20 pmPorto
29h 15m
1 stop
LAX5:35 pmLos Angeles
$466

momondo Fare Finder

 
Customize your flight search to find flights from California to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 26, 2026.
Use the filters below to find and compare flights from California to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 2/21

4:45 pm-5:00 pm

1 stop16h 15m

Porto

Sat 3/7

6:55 am-3:00 pm

1 stop16h 05m

$431

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 4/4

7:35 pm-7:00 pm

1 stop15h 25m

Porto

Tue 4/14

7:00 am-2:35 pm

1 stop15h 35m

$431

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 2/15

7:10 pm-11:15 am

1 stop32h 05m

Porto

Wed 3/4

7:20 pm-4:35 pm

1 stop29h 15m

$438

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 2/24

7:10 pm-6:30 pm

1 stop15h 20m

Porto

Wed 3/4

7:20 pm-4:35 pm

1 stop29h 15m

$443

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 3/4

5:35 pm-11:40 pm

1 stop22h 05m

Porto

Sun 3/8

6:15 am-3:45 pm

1 stop17h 30m

$482

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 4/14

1:40 pm-6:20 pm

1 stop20h 40m

Porto

Mon 4/20

4:20 pm-11:50 am

1 stop27h 30m

$483

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Mon 2/23

10:00 pm-10:30 am

2 stops28h 30m

Porto

Wed 3/4

11:15 am-12:05 pm

1 stop32h 50m

$484

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 3/3

2:00 pm-10:30 am

1 stop36h 30m

Porto

Wed 3/18

11:15 am-1:05 pm

1 stop32h 50m

$485

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 3/4

11:57 am-11:40 pm

2 stops27h 43m

Porto

Sun 3/8

6:15 am-3:45 pm

1 stop17h 30m

$486

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 4/14

11:58 am-3:30 pm

2 stops19h 32m

Porto

Mon 4/20

11:25 am-11:50 am

1 stop32h 25m

$488

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto from

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?

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 $649.

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 $875 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 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

Fastest flight time

14h 15m

Direct flights

None
The fastest flight from California to Porto takes 14h 15m
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?

  • 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
LEVELPriceFrom $263Free CancellationRating
0.0
Search LEVEL flights
KLMPriceFrom $366Free CancellationRating
7.7
1,443 reviews
Search KLM flights
IberiaPriceFrom $451Free CancellationRating
7.0
3,098 reviews
Search Iberia flights
Scandinavian AirlinesPriceFrom $460Free CancellationRating
7.3
1,669 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $484Free CancellationRating
7.9
8,115 reviews
Search Delta flights
TAP AIR PORTUGALPriceFrom $522Free CancellationRating
7.1
2,130 reviews
Search TAP AIR PORTUGAL flights
British AirwaysPriceFrom $533Free CancellationRating
6.7
7,701 reviews
Search British Airways flights
LufthansaPriceFrom $550Free CancellationRating
6.8
7,747 reviews
Search Lufthansa flights
American AirlinesPriceFrom $574Free CancellationRating
7.2
11,189 reviews
Search American Airlines flights
United AirlinesPriceFrom $593Free CancellationRating
7.4
9,202 reviews
Search United Airlines flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Aveiro
Matosinhos
Esposende
Lamego
Guimarães
Espinho
Chaves
Pinhao
Arcos de Valdevez
Ponte de Lima
Viseu
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.

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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