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Cheap flights from California to Porto from $322

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 10/19. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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 - 11:05 am
SFO
-
OPO
34h 20m
1 stop
Scandinavian Airlines Logo
5:50 pm - 2:50 pm
OPO
-
SFO
29h 00m
1 stop
$698Scandinavian Airlines
Mon, Nov 16 - Thu, Nov 19
Scandinavian Airlines Logo
5:45 pm - 11:05 am
SFO
-
OPO
34h 20m
1 stop
Scandinavian Airlines Logo
5:35 pm - 2:50 pm
OPO
-
SFO
29h 15m
1 stop
$732Scandinavian Airlines
Sat, Oct 31 - Sun, Nov 15
United Airlines Logo
7:25 am - 9:30 am
BUR
-
OPO
18h 05m
2 stops
United Airlines Logo
6:00 am - 8:28 pm
OPO
-
BUR
22h 28m
2 stops
$746United Airlines
Sun, Dec 6 - Thu, Dec 10
United Airlines Logo
6:02 am - 9:30 am
ONT
-
OPO
19h 28m
2 stops
United Airlines Logo
6:00 am - 11:06 pm
OPO
-
ONT
25h 06m
2 stops
$746United Airlines
Sun, Dec 6 - Thu, Dec 10
Delta Logo
3:05 pm - 3:25 pm
SAN
-
OPO
17h 20m
1 stop
Delta Logo
5:00 am - 12:10 pm
OPO
-
SAN
15h 10m
1 stop
$747Delta
Tue, Oct 27 - Tue, Nov 3
Delta Logo
6:20 am - 10:30 am
SAN
-
OPO
21h 10m
2 stops
Delta Logo
5:00 am - 6:27 pm
OPO
-
SAN
21h 27m
2 stops
$757Delta
Tue, Oct 27 - Tue, Nov 3
Air Canada Logo
4:55 pm - 7:00 am
SAN
-
OPO
30h 05m
2 stops
Air Canada Logo
11:15 am - 6:35 pm
OPO
-
SAN
39h 20m
2 stops
$773Air Canada
Tue, Oct 6 - Tue, Oct 20
Lufthansa Logo
5:15 pm - 11:25 pm
SAN
-
OPO
22h 10m
1 stop
Lufthansa Logo
6:20 am - 3:25 pm
OPO
-
SAN
17h 05m
1 stop
$775Lufthansa
Tue, Oct 6 - Tue, Oct 20
Lufthansa Logo
2:40 pm - 10:50 pm
SFO
-
OPO
24h 10m
1 stop
Lufthansa Logo
6:20 am - 7:00 pm
OPO
-
SFO
20h 40m
1 stop
$808Lufthansa
Tue, Sep 22 - Tue, Sep 29
Air Canada Logo
1:15 pm - 7:00 am
SNA
-
OPO
33h 45m
2 stops
Air Canada Logo
11:50 am - 7:11 pm
OPO
-
SNA
39h 21m
2 stops
$849Air Canada
Mon, Aug 17 - Thu, Sep 10

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Delta flights from California to Porto

Our best Delta deals on California to Porto flight tickets
Delta
Oct 27
SAN3:05 pmSan Diego
17h 20m
1 stop
OPO3:25 pmPorto
Nov 3
OPO5:00 amPorto
15h 10m
1 stop
SAN12:10 pmSan Diego
$747
Delta
Oct 27
SAN6:20 amSan Diego
21h 10m
2 stops
OPO10:30 amPorto
Nov 3
OPO5:00 amPorto
21h 27m
2 stops
SAN6:27 pmSan Diego
$757
Delta
Oct 18
SMF6:00 amSacramento Intl
25h 30m
2 stops
OPO3:30 pmPorto
Oct 27
OPO5:00 amPorto
18h 02m
2 stops
SMF4:02 pmSacramento Intl
$798

Scandinavian Airlines flights from California to Porto

Our best Scandinavian Airlines deals on California to Porto flight tickets
Scandinavian Airlines
Nov 16
SFO4:45 pmSan Francisco
34h 20m
1 stop
OPO11:05 amPorto
Nov 19
OPO5:50 pmPorto
29h 00m
1 stop
SFO2:50 pmSan Francisco
$698
Scandinavian Airlines
Oct 31
SFO5:45 pmSan Francisco
34h 20m
1 stop
OPO11:05 amPorto
Nov 15
OPO5:35 pmPorto
29h 15m
1 stop
SFO2:50 pmSan Francisco
$732
Scandinavian Airlines
Nov 7
SFO4:45 pmSan Francisco
34h 20m
1 stop
OPO11:05 amPorto
Nov 16
OPO11:55 amPorto
34h 55m
1 stop
SFO2:50 pmSan Francisco
$745

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 June 16, 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

Mon 11/16

4:45 pm-11:05 am

1 stop34h 20m

Porto

Thu 11/19

5:50 pm-2:50 pm

1 stop29h 00m

$698

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 10/31

5:45 pm-11:05 am

1 stop34h 20m

Porto

Sun 11/15

5:35 pm-2:50 pm

1 stop29h 15m

$732

BurbankPorto

BUR - OPO

BUROPO

Burbank Bob Hope

Sun 12/6

7:25 am-9:30 am

2 stops18h 05m

Porto

Thu 12/10

6:00 am-8:28 pm

2 stops22h 28m

$746

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sun 12/6

6:02 am-9:30 am

2 stops19h 28m

Porto

Thu 12/10

6:00 am-11:06 pm

2 stops25h 06m

$746
Quickest round-trip

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 10/27

3:05 pm-3:25 pm

1 stop17h 20m

Porto

Tue 11/3

5:00 am-12:10 pm

1 stop15h 10m

$747

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 10/27

6:20 am-10:30 am

2 stops21h 10m

Porto

Tue 11/3

5:00 am-6:27 pm

2 stops21h 27m

$757

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 10/6

4:55 pm-7:00 am

2 stops30h 05m

Porto

Tue 10/20

11:15 am-6:35 pm

2 stops39h 20m

$773

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 10/6

5:15 pm-11:25 pm

1 stop22h 10m

Porto

Tue 10/20

6:20 am-3:25 pm

1 stop17h 05m

$775

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 9/22

2:40 pm-10:50 pm

1 stop24h 10m

Porto

Tue 9/29

6:20 am-7:00 pm

1 stop20h 40m

$808

Santa AnaPorto

SNA - OPO

SNAOPO

Santa Ana J. Wayne/Orange Cnty

Mon 8/17

1:15 pm-7:00 am

2 stops33h 45m

Porto

Thu 9/10

11:50 am-7:11 pm

2 stops39h 21m

$849

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 $860 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 $775 on momondo.

Can stopping save me money on California to Porto flights?

You could potentially save up to 9% 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 10m

Direct flights

None
The fastest flight from California to Porto takes 13h 10m
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
1,529 reviews
Search KLM flights
TAP AIR PORTUGALPriceFrom $431Free CancellationRating
7.2
2,280 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.4
1,828 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $495Free CancellationRating
7.8
8,407 reviews
Search Delta flights
IberiaPriceFrom $545Free CancellationRating
7.0
3,237 reviews
Search Iberia flights
LufthansaPriceFrom $550Free CancellationRating
6.8
8,066 reviews
Search Lufthansa flights
United AirlinesPriceFrom $562Free CancellationRating
7.4
9,843 reviews
Search United Airlines flights
SWISSPriceFrom $623Free CancellationRating
7.5
1,971 reviews
Search SWISS flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,410 reviews
Search Turkish Airlines flights
American AirlinesPriceFrom $742Free CancellationRating
7.1
11,668 reviews
Search American 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
Lamego
Esposende
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Ponte de Lima
Viseu
Curia
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.

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