Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from California to Porto from $289

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 8/29. 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
11:55 am - 2:50 pm
OPO
-
SFO
34h 55m
1 stop
$705Scandinavian Airlines
Sat, Nov 7 - Mon, Nov 16
Air Canada Logo
6:46 pm - 6:50 am
SMF
-
OPO
28h 04m
2 stops
Air Canada Logo
6:00 am - 3:22 pm
OPO
-
SMF
17h 22m
2 stops
$739Air Canada
Sun, Oct 18 - Thu, Nov 5
Multiple Airlines Logo
6:45 am - 9:30 am
SMF
-
OPO
18h 45m
2 stops
Multiple Airlines Logo
6:00 am - 3:22 pm
OPO
-
SMF
17h 22m
2 stops
$740Multiple Airlines
Tue, Nov 3 - Wed, Nov 11
Lufthansa Logo
10:17 am - 3:20 pm
SMF
-
OPO
21h 03m
2 stops
Lufthansa Logo
6:00 am - 3:22 pm
OPO
-
SMF
17h 22m
2 stops
$743Lufthansa
Wed, Nov 4 - Wed, Nov 11
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
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
Multiple Airlines Logo
6:00 pm - 7:00 am
SMF
-
OPO
29h 00m
2 stops
Multiple Airlines Logo
7:20 pm - 10:35 pm
OPO
-
SMF
35h 15m
2 stops
$747Multiple Airlines
Mon, Oct 19 - Mon, Nov 2
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
$748Delta
Tue, Oct 27 - Tue, Nov 3
United Airlines Logo
7:00 am - 9:30 am
SMF
-
OPO
18h 30m
2 stops
United Airlines Logo
6:00 am - 10:19 pm
OPO
-
SMF
24h 19m
2 stops
$750United Airlines
Mon, Nov 9 - Wed, Nov 18
Lufthansa Logo
2:09 pm - 3:20 pm
SMF
-
OPO
41h 11m
2 stops
Lufthansa Logo
6:00 am - 9:10 pm
OPO
-
SMF
23h 10m
2 stops
$758Lufthansa
Sat, Nov 7 - Tue, Nov 17

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Lufthansa flights from California to Porto

Our best Lufthansa deals on California to Porto flight tickets
Lufthansa
Nov 4
SMF10:17 amSacramento Intl
21h 03m
2 stops
OPO3:20 pmPorto
Nov 11
OPO6:00 amPorto
17h 22m
2 stops
SMF3:22 pmSacramento Intl
$743
Lufthansa
Nov 7
SMF2:09 pmSacramento Intl
41h 11m
2 stops
OPO3:20 pmPorto
Nov 17
OPO6:00 amPorto
23h 10m
2 stops
SMF9:10 pmSacramento Intl
$758
Lufthansa
Nov 1
SMF11:00 amSacramento Intl
17h 50m
2 stops
OPO12:50 pmPorto
Nov 15
OPO6:15 amPorto
22h 07m
2 stops
SMF8:22 pmSacramento Intl
$792

SWISS flights from California to Porto

Our best SWISS deals on California to Porto flight tickets
SWISS
Nov 3
SMF8:00 amSacramento Intl
43h 15m
2 stops
OPO11:15 amPorto
Nov 9
OPO7:20 pmPorto
35h 21m
2 stops
SMF10:41 pmSacramento Intl
$762
SWISS
Oct 7
SFO7:35 pmSan Francisco
31h 50m
1 stop
OPO11:25 amPorto
Oct 21
OPO6:45 pmPorto
29h 30m
1 stop
SFO4:15 pmSan Francisco
$797
SWISS
Aug 9
SFO7:35 pmSan Francisco
14h 40m
1 stop
OPO6:15 pmPorto
Aug 19
OPO6:45 pmPorto
29h 30m
1 stop
SFO4:15 pmSan Francisco
$831

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 21, 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 11/7

4:45 pm-11:05 am

1 stop34h 20m

Porto

Mon 11/16

11:55 am-2:50 pm

1 stop34h 55m

$705

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Sun 10/18

6:46 pm-6:50 am

2 stops28h 04m

Porto

Thu 11/5

6:00 am-3:22 pm

2 stops17h 22m

$739

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Tue 11/3

6:45 am-9:30 am

2 stops18h 45m

Porto

Wed 11/11

6:00 am-3:22 pm

2 stops17h 22m

$740

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Wed 11/4

10:17 am-3:20 pm

2 stops21h 03m

Porto

Wed 11/11

6:00 am-3:22 pm

2 stops17h 22m

$743

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

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

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Mon 10/19

6:00 pm-7:00 am

2 stops29h 00m

Porto

Mon 11/2

7:20 pm-10:35 pm

2 stops35h 15m

$747
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

$748

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Mon 11/9

7:00 am-9:30 am

2 stops18h 30m

Porto

Wed 11/18

6:00 am-10:19 pm

2 stops24h 19m

$750

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Sat 11/7

2:09 pm-3:20 pm

2 stops41h 11m

Porto

Tue 11/17

6:00 am-9:10 pm

2 stops23h 10m

$758

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 14% 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
1,530 reviews
Search KLM flights
TAP AIR PORTUGALPriceFrom $431Free CancellationRating
7.2
2,291 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom $480Free CancellationRating
7.4
1,846 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $533Free CancellationRating
7.8
8,421 reviews
Search Delta flights
LufthansaPriceFrom $544Free CancellationRating
6.8
8,086 reviews
Search Lufthansa flights
IberiaPriceFrom $545Free CancellationRating
7.0
3,245 reviews
Search Iberia flights
United AirlinesPriceFrom $562Free CancellationRating
7.4
9,874 reviews
Search United Airlines flights
SWISSPriceFrom $623Free CancellationRating
7.5
1,972 reviews
Search SWISS flights
Turkish AirlinesPriceFrom $654Free CancellationRating
7.4
4,408 reviews
Search Turkish Airlines flights
American AirlinesPriceFrom $742Free CancellationRating
7.1
11,737 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.

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 7/21
Tue 7/28
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal