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$227+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — OPO
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from California to Porto

Keep the following information in mind while searching for California to Porto flight deals. Data was last updated September 15, 2025.

Round-trip from

$430
(FlightHub)

One-way from

$227
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$928
From California to Porto
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One-way flight from California to Porto
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High demand for flights, 2% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 15, 2025.

This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/148:30 amSFO - OPO
2 stops22h 30mMultiple Airlines
Tue 10/2110:50 pmOPO - SFO
2 stops29h 01mMultiple Airlines
Deal found 9/15$489
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 11/64:40 pmSFO - OPO
1 stop16h 15mScandinavian Airlines
Fri 11/215:35 pmOPO - SFO
1 stop29h 00mScandinavian Airlines
Deal found 9/15$499
This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/285:45 pmLAX - OPO
1 stop14h 15mTAP AIR PORTUGAL
Fri 11/78:05 pmOPO - LAX
1 stop26h 55mTAP AIR PORTUGAL
Deal found 9/14$526
This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/144:20 pmSFO - OPO
1 stop20h 05mTAP AIR PORTUGAL
Wed 10/227:00 amOPO - SFO
1 stop15h 35mTAP AIR PORTUGAL
Deal found 9/14$526
This FlightHub deal was found by Cheapflights users on 9/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:10 pmSFO - OPO
1 stop18h 50mTAP AIR PORTUGAL
Mon 11/176:55 amOPO - SFO
1 stop15h 40mTAP AIR PORTUGAL
Deal found 9/13$528
This FlightHub deal was found by Cheapflights users on 9/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/84:45 pmLAX - OPO
1 stop16h 15mTAP AIR PORTUGAL
Sat 11/156:55 amOPO - LAX
1 stop16h 05mTAP AIR PORTUGAL
Deal found 9/15$529
This FlightHub deal was found by Cheapflights users on 9/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/84:35 pmSFO - OPO
1 stop17h 30mTAP AIR PORTUGAL
Wed 11/196:55 amOPO - SFO
1 stop15h 35mTAP AIR PORTUGAL
Deal found 9/15$529
This Gotogate deal was found by Cheapflights users on 9/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:25 pmSFO - OPO
1 stop15h 05mMultiple Airlines
Tue 11/46:00 amOPO - SFO
2 stops23h 34mMultiple Airlines
Deal found 9/13$532
This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/44:40 pmLAX - OPO
1 stop18h 20mTAP AIR PORTUGAL
Fri 10/174:00 pmOPO - LAX
1 stop30h 40mTAP AIR PORTUGAL
Deal found 9/15$533
This United deal was found by Cheapflights users on 9/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/310:45 pmSFO - OPO
2 stops26h 45mMultiple Airlines
Tue 11/1812:30 pmOPO - SFO
1 stop15h 40mMultiple Airlines
Deal found 9/15$534
This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/148:05 amLAX - OPO
2 stops22h 55mMultiple Airlines
Mon 10/207:25 pmOPO - LAX
2 stops27h 50mMultiple Airlines
Deal found 9/15$537
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/911:44 pmSFO - OPO
2 stops25h 46mUnited Airlines
Fri 11/2112:30 pmOPO - SFO
1 stop15h 40mUnited Airlines
Deal found 9/15$540

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 September 15, 2025.
Use the filters below to find and compare flights from California to Porto that are best for you.

Fly from

California

Fly to

Porto

Route

Depart

Return

Price

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Thu 11/6

4:40 pm-4:55 pm

1 stop16h 15m

Porto

Fri 11/21

5:35 pm-2:35 pm

1 stop29h 00m

$499

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 11/18

4:45 pm-6:55 pm

1 stop18h 10m

Porto

Fri 11/28

3:55 pm-3:00 pm

1 stop31h 05m

$526

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 11/8

4:45 pm-3:00 pm

1 stop14h 15m

Porto

Sat 11/15

6:55 am-3:00 pm

1 stop16h 05m

$526

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 11/4

4:45 pm-6:55 pm

1 stop18h 10m

Porto

Tue 11/11

6:55 am-3:00 pm

1 stop16h 05m

$526

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 11/8

4:35 pm-6:05 pm

1 stop17h 30m

Porto

Mon 11/17

6:55 am-2:35 pm

1 stop15h 40m

$528

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Fri 11/7

7:10 pm-10:00 pm

1 stop18h 50m

Porto

Mon 11/17

6:55 am-2:35 pm

1 stop15h 40m

$528

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 10/14

8:05 am-3:00 pm

2 stops22h 55m

Porto

Mon 10/20

7:25 pm-3:15 pm

2 stops27h 50m

$537

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Tue 11/18

12:43 am-9:30 am

2 stops24h 47m

Porto

Wed 11/26

12:30 pm-8:10 pm

1 stop15h 40m

$540

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sun 11/9

11:44 pm-9:30 am

2 stops25h 46m

Porto

Thu 11/20

12:35 pm-12:12 am

2 stops19h 37m

$547

San FranciscoPorto

SFO - OPO

SFOOPO

San Francisco

Sat 11/1

11:10 pm-9:30 am

2 stops27h 20m

Porto

Fri 11/14

12:35 pm-7:35 am

2 stops27h 00m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 60 results
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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 $523). Flying from California to Porto in June is currently the most expensive (average of $1,027). 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.

What is the cheapest time of day to fly from CA to OPO?

Find hourly flight availability from California to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from California to Porto as you normally would.

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 16h 15m. The distance from California to Porto is about 5566 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 Scandinavian Airlines ($409), United Airlines ($453), and Lufthansa ($467).

  • 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 $523). Flying from California to Porto in June is currently the most expensive (average of $1,027). 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
Aveiro
Arcos de Valdevez
Coimbra

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for California to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$402Average$606FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$540Average$1,027FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$572Average$913FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$574Average$1,093FlexibilityNo cancel feeOn-time71%
SWISSCheapest$610Average$970FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$615Average$1,101FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$624Average$781FlexibilityNo cancel feeOn-time77%
VuelingCheapest$625Average$895FlexibilityNo cancel feeOn-time88%
British AirwaysCheapest$628Average$834FlexibilityNo cancel feeOn-time70%
KLMCheapest$648Average$892FlexibilityNo cancel feeOn-time75%

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