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Cheap flights from California to Porto from $310

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 10/16. 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.
TAP AIR PORTUGAL Logo
5:15 pm - 3:00 pm
LAX
-
OPO
13h 45m
1 stop
TAP AIR PORTUGAL Logo
8:00 pm - 3:15 pm
OPO
-
LAX
27h 15m
1 stop
$649TAP AIR PORTUGAL
Tue, Nov 10 - Wed, Nov 18
TAP AIR PORTUGAL Logo
4:20 pm - 7:00 pm
SFO
-
OPO
18h 40m
1 stop
TAP AIR PORTUGAL Logo
6:00 pm - 2:35 pm
OPO
-
SFO
28h 35m
1 stop
$649TAP AIR PORTUGAL
Tue, Sep 22 - Tue, Sep 29
Multiple Airlines Logo
5:30 pm - 11:55 pm
LAX
-
OPO
22h 25m
1 stop
Multiple Airlines Logo
6:00 am - 10:34 am
OPO
-
LAX
36h 34m
2 stops
$724Multiple Airlines
Wed, Nov 18 - Wed, Dec 9
Delta Logo
7:00 am - 9:05 am
SAN
-
OPO
18h 05m
1 stop
Delta Logo
11:15 am - 12:10 pm
OPO
-
SAN
32h 55m
1 stop
$739Delta
Sun, Dec 6 - Wed, Jan 13
Delta Logo
6:15 am - 10:00 pm
SAN
-
OPO
31h 45m
2 stops
Delta Logo
11:15 am - 12:10 pm
OPO
-
SAN
32h 55m
1 stop
$742Delta
Mon, Dec 7 - Wed, Jan 13
KLM Logo
3:05 pm - 3:25 pm
SAN
-
OPO
17h 20m
1 stop
KLM Logo
5:00 am - 12:10 pm
OPO
-
SAN
15h 10m
1 stop
$747KLM
Tue, Oct 27 - Tue, Nov 3
United Airlines Logo
5:00 am - 9:30 am
SMF
-
OPO
20h 30m
2 stops
United Airlines Logo
6:00 am - 5:28 pm
OPO
-
SMF
19h 28m
2 stops
$749United Airlines
Mon, Nov 16 - Thu, Nov 19
Multiple Airlines Logo
9:55 pm - 9:30 am
SAN
-
OPO
27h 35m
2 stops
Multiple Airlines Logo
1:45 pm - 3:45 pm
OPO
-
SAN
34h 00m
1 stop
$749Multiple Airlines
Tue, Dec 8 - Tue, Jan 12
United Airlines Logo
5:00 am - 9:30 am
SMF
-
OPO
20h 30m
2 stops
United Airlines Logo
6:00 am - 10:19 pm
OPO
-
SMF
24h 19m
2 stops
$754United Airlines
Mon, Nov 16 - Thu, Nov 19
KLM Logo
7:00 am - 10:15 pm
LGB
-
OPO
31h 15m
2 stops
KLM Logo
7:10 pm - 9:38 pm
OPO
-
LGB
34h 28m
2 stops
$1,158KLM
Wed, Sep 2 - Wed, Sep 9

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TAP AIR PORTUGAL flights from California to Porto

Our best TAP AIR PORTUGAL deals on California to Porto flight tickets
TAP AIR PORTUGAL
Nov 10
LAX5:15 pmLos Angeles
13h 45m
1 stop
OPO3:00 pmPorto
Nov 18
OPO8:00 pmPorto
27h 15m
1 stop
LAX3:15 pmLos Angeles
$649
TAP AIR PORTUGAL
Oct 1
SFO4:30 pmSan Francisco
18h 25m
1 stop
OPO6:55 pmPorto
Oct 18
OPO10:30 pmPorto
23h 35m
1 stop
SFO2:05 pmSan Francisco
$651
TAP AIR PORTUGAL
Aug 6
SFO4:30 pmSan Francisco
14h 30m
1 stop
OPO3:00 pmPorto
Aug 21
OPO9:15 pmPorto
28h 20m
1 stop
SFO5:35 pmSan Francisco
$653

United Airlines flights from California to Porto

Our best United Airlines deals on California to Porto flight tickets
United Airlines
Nov 3
LAX12:15 pmLos Angeles
13h 15m
1 stop
OPO9:30 amPorto
Nov 11
OPO6:00 amPorto
21h 18m
2 stops
LAX7:18 pmLos Angeles
$741
United Airlines
Nov 16
SMF5:00 amSacramento Intl
20h 30m
2 stops
OPO9:30 amPorto
Nov 19
OPO6:00 amPorto
19h 28m
2 stops
SMF5:28 pmSacramento Intl
$749
United Airlines
Nov 16
SMF5:00 amSacramento Intl
20h 30m
2 stops
OPO9:30 amPorto
Nov 19
OPO6:00 amPorto
24h 19m
2 stops
SMF10:19 pmSacramento Intl
$754

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 22, 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

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 11/10

5:15 pm-3:00 pm

1 stop13h 45m

Porto

Wed 11/18

8:00 pm-3:15 pm

1 stop27h 15m

$649

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 9/22

4:20 pm-7:00 pm

1 stop18h 40m

Porto

Tue 9/29

6:00 pm-2:35 pm

1 stop28h 35m

$649

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 11/18

5:30 pm-11:55 pm

1 stop22h 25m

Porto

Wed 12/9

6:00 am-10:34 am

2 stops36h 34m

$724

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sun 12/6

7:00 am-9:05 am

1 stop18h 05m

Porto

Wed 1/13

11:15 am-12:10 pm

1 stop32h 55m

$739

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Mon 12/7

6:15 am-10:00 pm

2 stops31h 45m

Porto

Wed 1/13

11:15 am-12:10 pm

1 stop32h 55m

$742
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

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Mon 11/16

5:00 am-9:30 am

2 stops20h 30m

Porto

Thu 11/19

6:00 am-5:28 pm

2 stops19h 28m

$749

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 12/8

9:55 pm-9:30 am

2 stops27h 35m

Porto

Tue 1/12

1:45 pm-3:45 pm

1 stop34h 00m

$749

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Mon 11/16

5:00 am-9:30 am

2 stops20h 30m

Porto

Thu 11/19

6:00 am-10:19 pm

2 stops24h 19m

$754

Long BeachPorto

LGB - OPO

LGBOPO

Long Beach Municipal

Wed 9/2

7:00 am-10:15 pm

2 stops31h 15m

Porto

Wed 9/9

7:10 pm-9:38 pm

2 stops34h 28m

$1,158

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 April instead. Flights to Porto in April, while not as cheap as those in February, still average around $712.

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 $866 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 $821 on momondo.

Can stopping save me money on California to Porto flights?

You could potentially save up to 21% 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 45m

Direct flights

None
The fastest flight from California to Porto takes 13h 45m
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
1,544 reviews
Search KLM flights
TAP AIR PORTUGALPriceFrom $431Free CancellationRating
7.2
2,344 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.4
1,895 reviews
Search Scandinavian Airlines flights
British AirwaysPriceFrom $533Free CancellationRating
6.7
8,127 reviews
Search British Airways flights
DeltaPriceFrom $533Free CancellationRating
7.8
8,479 reviews
Search Delta flights
LufthansaPriceFrom $544Free CancellationRating
6.8
8,159 reviews
Search Lufthansa flights
IberiaPriceFrom $545Free CancellationRating
7.0
3,257 reviews
Search Iberia flights
United AirlinesPriceFrom $562Free CancellationRating
7.4
10,024 reviews
Search United Airlines flights
SWISSPriceFrom $623Free CancellationRating
7.5
2,016 reviews
Search SWISS flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,447 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
Pinhao
Chaves
Arcos de Valdevez
Guimarães
Viseu
Espinho
Ponte de Lima
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.

An easier way to manage your Porto trip

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