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$239+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — OPO
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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 December 12, 2025.

This Mytrip deal was found by Cheapflights users on 12/8. 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 12/308:25 amSFO - OPO
2 stops28h 50mMultiple Airlines
Fri 1/96:30 pmOPO - SFO
3 stops34h 52mMultiple Airlines
Deal found 12/8$1,044
This Mytrip deal was found by Cheapflights users on 12/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/148:20 amLAX - OPO
3 stops26h 40mMultiple Airlines
Tue 12/238:10 pmOPO - LAX
3 stops31h 17mMultiple Airlines
Deal found 12/10$1,106
This KLM deal was found by Cheapflights users on 12/10. 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 12/3011:45 amSNA - OPO
2 stops19h 40mKLM
Thu 1/84:10 pmOPO - SNA
2 stops35h 54mKLM
Deal found 12/10$1,137
This United Airlines deal was found by Cheapflights users on 12/8. 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 12/306:45 amSFO - OPO
2 stops20h 55mUnited Airlines
Fri 1/96:00 amOPO - SFO
2 stops23h 30mUnited Airlines
Deal found 12/8$1,156
This Mytrip deal was found by Cheapflights users on 12/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:59 pmLAX - OPO
2 stops29h 06mMultiple Airlines
Wed 1/78:55 pmOPO - LAX
2 stops30h 32mMultiple Airlines
Deal found 12/10$1,180
This oojo deal was found by Cheapflights users on 12/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/301:05 pmLAX - OPO
1 stop36h 50mTurkish Airlines
Thu 1/810:55 amOPO - LAX
1 stop32h 15mTurkish Airlines
Deal found 12/9$1,207
This SWISS deal was found by Cheapflights users on 12/11. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:10 pmLAX - OPO
1 stop15h 20mSWISS
Wed 1/712:00 pmOPO - LAX
2 stops38h 45mSWISS
Deal found 12/11$1,215
This KAYAK deal was found by Cheapflights users on 12/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:30 pmLAX - OPO
1 stop22h 10mLufthansa
Mon 12/296:15 amOPO - LAX
1 stop17h 00mLufthansa
Deal found 12/11$1,226
This Mytrip deal was found by Cheapflights users on 12/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:30 pmLAX - OPO
3 stops30h 40mMultiple Airlines
Fri 12/195:35 pmOPO - LAX
2 stops29h 40mMultiple Airlines
Deal found 12/11$1,234
This oojo deal was found by Cheapflights users on 12/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:45 pmLAX - OPO
1 stop18h 10mTAP AIR PORTUGAL
Thu 1/86:00 pmOPO - LAX
2 stops37h 59mTAP AIR PORTUGAL
Deal found 12/9$1,237
This Orbitz deal was found by Cheapflights users on 12/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:00 amSFO - OPO
2 stops30h 15mMultiple Airlines
Fri 12/196:00 pmOPO - SFO
1 stop28h 45mMultiple Airlines
Deal found 12/11$1,246
This Expedia deal was found by Cheapflights users on 12/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:00 amSFO - OPO
2 stops30h 15mMultiple Airlines
Wed 12/176:55 amOPO - SFO
1 stop15h 35mMultiple Airlines
Deal found 12/10$1,247

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$462
(Kiwi.com)

One-way from

$239
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$1,160
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
High demand for flights, 5% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 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

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 2/10

5:45 pm-10:30 am

1 stop32h 45m

Porto

Wed 2/25

5:00 am-11:45 am

1 stop14h 45m

$479

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 2/7

9:55 am-10:30 am

2 stops16h 35m

Porto

Fri 2/20

11:15 am-12:05 pm

1 stop32h 50m

$482

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 2/10

6:25 am-10:30 am

2 stops20h 05m

Porto

Mon 3/2

11:15 am-11:45 am

1 stop32h 30m

$482

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Mon 2/9

9:35 pm-10:30 am

2 stops28h 55m

Porto

Wed 2/25

11:15 am-11:45 am

1 stop32h 30m

$482

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 2/11

8:45 am-10:30 am

2 stops17h 45m

Porto

Wed 2/18

5:00 am-11:45 am

1 stop14h 45m

$482

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 2/10

7:45 am-10:30 am

2 stops18h 45m

Porto

Thu 2/26

11:15 am-11:45 am

1 stop32h 30m

$482

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 2/7

9:50 am-10:30 am

2 stops16h 40m

Porto

Tue 3/3

5:00 am-11:45 am

1 stop14h 45m

$482

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 2/11

1:45 pm-3:25 pm

1 stop17h 40m

Porto

Wed 2/18

4:10 pm-11:45 am

1 stop27h 35m

$483

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Fri 1/30

1:45 pm-10:20 pm

1 stop24h 35m

Porto

Tue 2/10

11:15 am-11:45 am

1 stop32h 30m

$483

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 3/10

3:00 pm-10:30 am

1 stop36h 30m

Porto

Fri 3/20

11:15 am-1:05 pm

1 stop32h 50m

$483

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

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, May is the cheapest month in which you can book a flight from California to Porto (average of $403). Flying from California to Porto in July is currently the most expensive (average of $805). 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 December 12, 2025.

It’s optimal to fly from California to Porto in the afternoon. By choosing this option you can save up to 8% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from California to Porto?

Use this chart to determine the cheapest time to fly round-trip from California to Porto. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their California to Porto flight should consider departing on Monday afternoons when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 35m. 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 LEVEL ($300), Iberia ($317), and TAP AIR PORTUGAL ($345).

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

    The most popular route from California to Porto is San Francisco - Porto. You may also consider Los Angeles - Porto or San Diego - 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, May is the cheapest month in which you can book a flight from California to Porto (average of $403). Flying from California to Porto in July is currently the most expensive (average of $805). 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
Vila Nova de Gaia

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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$388Average$688FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$476Average$877FlexibilityNo cancel feeOn-time75%
Scandinavian AirlinesCheapest$527Average$781FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$533Average$806FlexibilityNo cancel feeOn-time70%
IberiaCheapest$540Average$1,016FlexibilityNo cancel feeOn-time77%
SWISSCheapest$567Average$927FlexibilityNo cancel feeOn-time79%
American AirlinesCheapest$574Average$1,171FlexibilityNo cancel feeOn-time71%
TAP AIR PORTUGALCheapest$574Average$896FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$611Average$988FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$615Average$1,100FlexibilityNo cancel feeOn-time69%

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