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Cheap flights from California to Porto from $343

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 11/1. 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.
Scandinavian Airlines Logo
4:45 pm - 11:10 am
SFO
-
OPO
34h 25m
1 stop
Scandinavian Airlines Logo
11:55 am - 2:50 pm
OPO
-
SFO
34h 55m
1 stop
$646Scandinavian Airlines
Thu, Nov 12 - Wed, Feb 10
Scandinavian Airlines Logo
4:45 pm - 11:05 am
SFO
-
OPO
34h 20m
1 stop
Scandinavian Airlines Logo
11:55 am - 2:50 pm
OPO
-
SFO
34h 55m
1 stop
$669Scandinavian Airlines
Mon, Nov 9 - Wed, Feb 10
Multiple Airlines Logo
8:50 pm - 9:20 pm
LAX
-
OPO
16h 30m
1 stop
Multiple Airlines Logo
10:00 pm - 7:00 pm
OPO
-
LAX
29h 00m
1 stop
$675Multiple Airlines
Mon, Sep 21 - Fri, Oct 23
Iberia Logo
8:55 pm - 4:10 pm
LAX
-
OPO
35h 15m
1 stop
Iberia Logo
10:00 pm - 7:00 pm
OPO
-
LAX
29h 00m
1 stop
$718Iberia
Sat, Sep 19 - Fri, Oct 23
Multiple Airlines Logo
11:30 am - 6:30 pm
LAX
-
OPO
23h 00m
2 stops
Multiple Airlines Logo
7:20 pm - 4:35 pm
OPO
-
LAX
29h 15m
1 stop
$720Multiple Airlines
Sun, Nov 1 - Tue, Nov 10
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
$721SWISS
Sun, Nov 1 - Tue, Nov 10
Delta Logo
7:00 am - 9:05 am
LAX
-
OPO
18h 05m
1 stop
Delta Logo
5:00 am - 11:45 am
OPO
-
LAX
14h 45m
1 stop
$734Delta
Sun, Nov 1 - Thu, Nov 12
Delta Logo
11:45 pm - 9:05 am
LAX
-
OPO
26h 20m
2 stops
Delta Logo
11:15 am - 11:45 am
OPO
-
LAX
32h 30m
1 stop
$739Delta
Sat, Oct 31 - Mon, Nov 16
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
$740SWISS
Tue, Nov 3 - Thu, Nov 12
Iberia Logo
1:59 pm - 4:00 pm
SFO
-
OPO
18h 01m
2 stops
Iberia Logo
8:20 am - 10:58 pm
OPO
-
SFO
22h 38m
2 stops
$765Iberia
Tue, Oct 20 - Tue, Nov 3

Scandinavian Airlines flights from California to Porto

Our best Scandinavian Airlines deals on California to Porto flight tickets
Scandinavian Airlines
Nov 12
SFO4:45 pmSan Francisco
34h 25m
1 stop
OPO11:10 amPorto
Feb 10
OPO11:55 amPorto
34h 55m
1 stop
SFO2:50 pmSan Francisco
$646
Scandinavian Airlines
Nov 9
SFO4:45 pmSan Francisco
34h 20m
1 stop
OPO11:05 amPorto
Feb 10
OPO11:55 amPorto
34h 55m
1 stop
SFO2:50 pmSan Francisco
$669
Scandinavian Airlines
Nov 10
SFO4:15 pmSan Francisco
40h 45m
2 stops
OPO5:00 pmPorto
Feb 10
OPO11:55 amPorto
34h 55m
1 stop
SFO2:50 pmSan Francisco
$723

United Airlines flights from California to Porto

Our best United Airlines deals on California to Porto flight tickets
United Airlines
Nov 9
ONT7:00 amOntario
18h 30m
2 stops
OPO9:30 amPorto
Nov 13
OPO6:00 amPorto
24h 26m
2 stops
ONT10:26 pmOntario
$746
United Airlines
Nov 7
LAX11:58 pmLos Angeles
25h 32m
2 stops
OPO9:30 amPorto
Nov 11
OPO6:00 amPorto
20h 09m
2 stops
LAX6:09 pmLos Angeles
$747
United Airlines
Nov 2
ONT6:02 amOntario
19h 28m
2 stops
OPO9:30 amPorto
Dec 4
OPO12:35 pmPorto
31h 58m
2 stops
ONT12:33 pmOntario
$755

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 May 17, 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

Cheapest round-trip

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 11/12

4:45 pm-11:10 am

1 stop34h 25m

Porto

Wed 2/10

11:55 am-2:50 pm

1 stop34h 55m

$646

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 11/9

4:45 pm-11:05 am

1 stop34h 20m

Porto

Wed 2/10

11:55 am-2:50 pm

1 stop34h 55m

$669

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 9/21

8:50 pm-9:20 pm

1 stop16h 30m

Porto

Fri 10/23

10:00 pm-7:00 pm

1 stop29h 00m

$675

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 9/19

8:55 pm-4:10 pm

1 stop35h 15m

Porto

Fri 10/23

10:00 pm-7:00 pm

1 stop29h 00m

$718

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 11/1

11:30 am-6:30 pm

2 stops23h 00m

Porto

Tue 11/10

7:20 pm-4:35 pm

1 stop29h 15m

$720

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 11/1

7:10 pm-6:30 pm

1 stop15h 20m

Porto

Tue 11/10

7:20 pm-4:35 pm

1 stop29h 15m

$721
Quickest round-trip

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 11/1

7:00 am-9:05 am

1 stop18h 05m

Porto

Thu 11/12

5:00 am-11:45 am

1 stop14h 45m

$734

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 10/31

11:45 pm-9:05 am

2 stops26h 20m

Porto

Mon 11/16

11:15 am-11:45 am

1 stop32h 30m

$739

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 11/3

7:10 pm-6:30 pm

1 stop15h 20m

Porto

Thu 11/12

7:20 pm-4:35 pm

1 stop29h 15m

$740

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 10/20

1:59 pm-4:00 pm

2 stops18h 01m

Porto

Tue 11/3

8:20 am-10:58 pm

2 stops22h 38m

$765

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 January is, on average, the cheapest month to fly to Porto from California, with most prices found around $251. 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 $366.

How far in advance should I book a flight from California 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 $853 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 $724 on momondo.

Can stopping save me money on California to Porto flights?

You could potentially save up to 1% 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 07m

Direct flights

None
The fastest flight from California to Porto takes 13h 07m
There are no direct flights from California to Porto. There are no popular flight routes from California to Porto.
Search flight deals

Frequently asked questions about flying from California to Porto

  • 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
KLMPriceFrom $366Free CancellationRating
7.8
1,517 reviews
Search KLM flights
TAP AIR PORTUGALPriceFrom $431Free CancellationRating
7.2
2,252 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.4
1,781 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $489Free CancellationRating
7.9
8,450 reviews
Search Delta flights
IberiaPriceFrom $545Free CancellationRating
7.0
3,220 reviews
Search Iberia flights
American AirlinesPriceFrom $546Free CancellationRating
7.1
11,653 reviews
Search American Airlines flights
LufthansaPriceFrom $550Free CancellationRating
6.8
8,009 reviews
Search Lufthansa flights
United AirlinesPriceFrom $593Free CancellationRating
7.4
9,738 reviews
Search United Airlines flights
SWISSPriceFrom $596Free CancellationRating
7.5
1,949 reviews
Search SWISS flights
Air CanadaPriceFrom $765Free CancellationRating
7.1
11,060 reviews
Search Air Canada 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
Lamego
Esposende
Chaves
Pinhao
Espinho
Guimarães
Arcos de Valdevez
Viseu
Ponte de Lima
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

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