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Cheap flights from California to Porto from $311

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 10/13. 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 - 7:30 pm
SFO
-
OPO
18h 45m
1 stop
Scandinavian Airlines Logo
5:55 pm - 2:40 pm
OPO
-
SFO
28h 45m
1 stop
$616Scandinavian Airlines
Sat, Aug 15 - Fri, Aug 28
TAP AIR PORTUGAL Logo
4:30 pm - 3:00 pm
SFO
-
OPO
14h 30m
1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 1:35 pm
OPO
-
SFO
23h 05m
1 stop
$642TAP AIR PORTUGAL
Mon, Oct 5 - Mon, Oct 19
Multiple Airlines Logo
7:00 am - 9:05 am
SAN
-
OPO
18h 05m
1 stop
Multiple Airlines Logo
11:15 am - 12:10 pm
OPO
-
SAN
32h 55m
1 stop
$743Multiple Airlines
Wed, Nov 18 - Wed, Nov 25
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
$746Delta
Tue, Oct 27 - Tue, Nov 3
Lufthansa Logo
8:45 am - 12:50 pm
SJC
-
OPO
20h 05m
2 stops
Lufthansa Logo
6:00 am - 9:04 pm
OPO
-
SJC
23h 04m
2 stops
$746Lufthansa
Sun, Nov 1 - Tue, Nov 17
Delta Logo
8:00 am - 10:35 am
SAN
-
OPO
19h 35m
2 stops
Delta Logo
5:00 am - 12:10 pm
OPO
-
SAN
15h 10m
1 stop
$747Delta
Tue, Oct 27 - Tue, Nov 3
United Airlines Logo
8:54 am - 9:30 am
BUR
-
OPO
16h 36m
2 stops
United Airlines Logo
12:35 pm - 12:45 pm
OPO
-
BUR
32h 10m
2 stops
$755United Airlines
Mon, Nov 16 - Wed, Nov 18
United Airlines Logo
8:00 am - 9:30 am
SAN
-
OPO
17h 30m
2 stops
United Airlines Logo
6:00 am - 10:30 pm
OPO
-
SAN
24h 30m
2 stops
$755United Airlines
Wed, Nov 18 - Wed, Nov 25
Lufthansa Logo
1:01 pm - 12:50 pm
SJC
-
OPO
40h 49m
2 stops
Lufthansa Logo
1:45 pm - 9:04 pm
OPO
-
SJC
39h 19m
2 stops
$781Lufthansa
Sat, Oct 31 - Mon, Nov 16
Multiple Airlines Logo
11:00 am - 12:50 pm
SMF
-
OPO
17h 50m
2 stops
Multiple Airlines Logo
6:15 am - 3:21 pm
OPO
-
SMF
41h 06m
2 stops
$788Multiple Airlines
Sun, Nov 1 - Sun, Nov 15

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Lufthansa flights from California to Porto

Our best Lufthansa deals on California to Porto flight tickets
Lufthansa
Nov 1
SJC8:45 amSan Jose
20h 05m
2 stops
OPO12:50 pmPorto
Nov 17
OPO6:00 amPorto
23h 04m
2 stops
SJC9:04 pmSan Jose
$746
Lufthansa
Oct 31
SJC1:01 pmSan Jose
40h 49m
2 stops
OPO12:50 pmPorto
Nov 16
OPO1:45 pmPorto
39h 19m
2 stops
SJC9:04 pmSan Jose
$781
Lufthansa
Oct 31
SJC1:01 pmSan Jose
40h 49m
2 stops
OPO12:50 pmPorto
Nov 14
OPO6:00 amPorto
23h 04m
2 stops
SJC9:04 pmSan Jose
$818

SWISS flights from California to Porto

Our best SWISS deals on California to Porto flight tickets
SWISS
Nov 1
SFO7:25 pmSan Francisco
31h 50m
1 stop
OPO11:15 amPorto
Nov 17
OPO12:05 pmPorto
36h 25m
1 stop
SFO4:30 pmSan Francisco
$748
SWISS
Nov 1
SFO7:25 pmSan Francisco
15h 05m
1 stop
OPO6:30 pmPorto
Nov 18
OPO7:20 pmPorto
29h 10m
1 stop
SFO4:30 pmSan Francisco
$753
SWISS
Aug 20
LAX7:35 pmLos Angeles
14h 55m
1 stop
OPO6:30 pmPorto
Sep 4
OPO8:40 amPorto
15h 50m
1 stop
LAX4:30 pmLos Angeles
$917

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 July 9, 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

Sat 8/15

4:45 pm-7:30 pm

1 stop18h 45m

Porto

Fri 8/28

5:55 pm-2:40 pm

1 stop28h 45m

$616

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Mon 10/5

4:30 pm-3:00 pm

1 stop14h 30m

Porto

Mon 10/19

10:30 pm-1:35 pm

1 stop23h 05m

$642

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 11/18

7:00 am-9:05 am

1 stop18h 05m

Porto

Wed 11/25

11:15 am-12:10 pm

1 stop32h 55m

$743
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

$746

San JosePorto

SJC - OPO

SJCOPO

San Jose

Sun 11/1

8:45 am-12:50 pm

2 stops20h 05m

Porto

Tue 11/17

6:00 am-9:04 pm

2 stops23h 04m

$746

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 10/27

8:00 am-10:35 am

2 stops19h 35m

Porto

Tue 11/3

5:00 am-12:10 pm

1 stop15h 10m

$747

BurbankPorto

BUR - OPO

BUROPO

Burbank Bob Hope

Mon 11/16

8:54 am-9:30 am

2 stops16h 36m

Porto

Wed 11/18

12:35 pm-12:45 pm

2 stops32h 10m

$755

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 11/18

8:00 am-9:30 am

2 stops17h 30m

Porto

Wed 11/25

6:00 am-10:30 pm

2 stops24h 30m

$755

San JosePorto

SJC - OPO

SJCOPO

San Jose

Sat 10/31

1:01 pm-12:50 pm

2 stops40h 49m

Porto

Mon 11/16

1:45 pm-9:04 pm

2 stops39h 19m

$781

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Sun 11/1

11:00 am-12:50 pm

2 stops17h 50m

Porto

Sun 11/15

6:15 am-3:21 pm

2 stops41h 06m

$788

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 $854 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 $792 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 05m

Direct flights

None
The fastest flight from California to Porto takes 13h 05m
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
1,536 reviews
Search KLM flights
TAP AIR PORTUGALPriceFrom $431Free CancellationRating
7.2
2,331 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.4
1,873 reviews
Search Scandinavian Airlines flights
British AirwaysPriceFrom $533Free CancellationRating
6.7
8,106 reviews
Search British Airways flights
DeltaPriceFrom $533Free CancellationRating
7.8
8,456 reviews
Search Delta flights
LufthansaPriceFrom $544Free CancellationRating
6.8
8,129 reviews
Search Lufthansa flights
IberiaPriceFrom $545Free CancellationRating
7.0
3,252 reviews
Search Iberia flights
United AirlinesPriceFrom $562Free CancellationRating
7.4
9,966 reviews
Search United Airlines flights
SWISSPriceFrom $623Free CancellationRating
7.5
1,996 reviews
Search SWISS flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,441 reviews
Search Turkish 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
Chaves
Pinhao
Arcos de Valdevez
Guimarães
Espinho
Ponte de Lima
Viseu
Curia
Mesao Frio
Penafiel
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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