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$322+ Cheap flights from California to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — OPO
Jul 15 — Jul 221
Wed 7/15
Wed 7/22
1 adult, Economy
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Cheap flight deals from California to Porto

Cheapest flights from California to Porto
Explore the most affordable flight options available from California to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 15, 2026.

This Scandinavian Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:45 pm
SFO
-
OPO
1 stop34h 20m
Scandinavian Airlines
Thu 11/195:50 pm
OPO
-
SFO
1 stop29h 00m
Scandinavian Airlines
Deal found 6/10$698
This Justfly.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:45 pm
SFO
-
OPO
1 stop34h 20m
Scandinavian Airlines
Mon 11/1611:55 am
OPO
-
SFO
1 stop34h 55m
Scandinavian Airlines
Deal found 6/10$745
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/67:25 am
BUR
-
OPO
2 stops18h 05m
United Airlines
Thu 12/106:00 am
OPO
-
BUR
2 stops22h 28m
United Airlines
Deal found 6/10$746
This KLM deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/31:05 pm
SAN
-
OPO
1 stop36h 00m
KLM
Wed 11/1111:15 am
OPO
-
SAN
1 stop32h 55m
KLM
Deal found 6/10$746
This United Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/66:02 am
ONT
-
OPO
2 stops19h 28m
United Airlines
Thu 12/106:00 am
OPO
-
ONT
2 stops25h 06m
United Airlines
Deal found 6/13$746
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/273:05 pm
SAN
-
OPO
1 stop17h 20m
Delta
Tue 11/35:00 am
OPO
-
SAN
1 stop15h 10m
Delta
Deal found 6/11$747
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/73:45 pm
SMF
-
OPO
2 stops33h 45m
United Airlines
Thu 12/1012:35 pm
OPO
-
SMF
2 stops18h 53m
United Airlines
Deal found 6/10$750
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:10 am
SAN
-
OPO
1 stop18h 20m
United Airlines
Wed 11/116:00 am
OPO
-
SAN
2 stops23h 57m
United Airlines
Deal found 6/10$751
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/610:30 pm
SAN
-
OPO
2 stops27h 00m
United Airlines
Thu 12/106:00 am
OPO
-
SAN
2 stops23h 57m
United Airlines
Deal found 6/9$756
This United Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/65:25 am
SMF
-
OPO
2 stops20h 05m
United Airlines
Thu 12/1012:35 pm
OPO
-
SMF
1 stop16h 30m
United Airlines
Deal found 6/13$759
This Gotogate deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:35 pm
SFO
-
OPO
1 stop31h 50m
SWISS
Wed 10/2812:05 pm
OPO
-
SFO
1 stop36h 25m
SWISS
Deal found 6/11$793
This Lufthansa deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:50 am
SMF
-
OPO
2 stops20h 00m
Lufthansa
Sun 11/156:00 am
OPO
-
SMF
2 stops17h 22m
Lufthansa
Deal found 6/10$793

Find flight deals from California to Porto

Keep the following information in mind while searching for California to Porto flight deals. Data was last updated June 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$698
(Scandinavian Airlines)

One-way from

$322
(Expedia)

Popular in

June

Cheapest in

February

Average price

$1,164
Provider with most accurate pricing for Los Angeles-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Porto flights.
Search Deals
From California to Porto
Search Deals
One-way flight from California to Porto
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($201 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated June 15, 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

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

Tue 11/17

6:02 am-9:30 am

2 stops19h 28m

Porto

Fri 11/20

6:00 am-8:20 pm

2 stops22h 20m

$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

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Tue 11/3

6:02 am-9:30 am

2 stops19h 28m

Porto

Tue 11/17

12:35 pm-11:06 pm

2 stops18h 31m

$746

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

Sun 12/6

5:25 am-9:30 am

2 stops20h 05m

Porto

Thu 12/10

6:00 am-11:28 pm

2 stops25h 28m

$750

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Mon 12/7

3:45 pm-9:30 am

2 stops33h 45m

Porto

Thu 12/10

12:35 pm-11:28 pm

2 stops18h 53m

$750

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sun 12/6

10:30 pm-9:30 am

2 stops27h 00m

Porto

Thu 12/10

6:00 am-9:57 pm

2 stops23h 57m

$756

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Sun 11/1

8:50 am-12:50 pm

2 stops20h 00m

Porto

Sun 11/15

6:00 am-3:22 pm

2 stops17h 22m

$793

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Sun 11/1

2:00 pm-9:30 am

2 stops35h 30m

Porto

Sun 11/15

6:00 am-3:22 pm

2 stops17h 22m

$795

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from California to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from California with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from California to Porto

What is the cheapest month to book a flight from California to Porto?

Currently, January is the cheapest month in which you can book a flight from California to Porto (average of $251). Flying from California to Porto in June is currently the most expensive (average of $747). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from California to Porto?

How far ahead should I book a flight from California to Porto?

The price you pay for your flight from California to Porto may vary depending on when you book. For the best chance of a lower fare, look to book 80 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Related info for your journey

Find useful and relevant information for your journey from California to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from California?

    Located just 6.8 mi from the city center, Porto (OPO) is the airport most travelers will use when flying to Porto from California.

  • How long is the flight from California to Porto?

    Departing from California to Porto will take you 17h 20m. The distance from California to Porto is about 5596 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from California to Porto one-way?

    The cheapest airlines for a one-way flight from California to Porto are KLM ($245), United Airlines ($258), and American Airlines ($274).

  • What are the most popular routes from California to Porto?

    The most popular route from California to Porto is Los Angeles - Porto. You may also consider San Francisco - Porto or Ontario - Porto.

  • Can I find deals for flights from California to Porto that include hotel bookings?

    Yes. In addition to deals on California to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from California to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to Porto.

  • Can I find deals for business class flights from California to Porto?

    Yes. Cheapflights offers flight deals from California to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from California to Porto?

    Currently, January is the cheapest month in which you can book a flight from California to Porto (average of $251). Flying from California to Porto in June is currently the most expensive (average of $747). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from California to Porto

Discover the top 10 airlines that operate flights from California to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$366Average$991FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$431Average$764FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$480Average$612FlexibilityNo cancel feeOn-time77%
DeltaCheapest$495Average$1,057FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$545Average$965FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$550Average$1,108FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$562Average$1,006FlexibilityNo cancel feeOn-time69%
SWISSCheapest$623Average$897FlexibilityNo cancel feeOn-time79%
Turkish AirlinesCheapest$654Average$789FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$742Average$1,088FlexibilityNo cancel feeOn-time71%

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