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$265+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — OPO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$597
(Mytrip)

One-way from

$265
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,071
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 ($21 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:02 amSAN - OPO
2 stops28h 23mLufthansa
Tue 11/1112:30 pmOPO - SAN
2 stops39h 22mLufthansa
Deal found 6/11$597
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:00 amSAN - OPO
3 stops23h 45mUnited Airlines
Tue 11/116:00 amOPO - SAN
2 stops26h 12mUnited Airlines
Deal found 6/11$614
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:40 amSAN - OPO
2 stops20h 05mIberia
Tue 11/118:40 pmOPO - SAN
2 stops31h 27mIberia
Deal found 6/11$617
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/111:02 amSAN - OPO
2 stops19h 53mMultiple Airlines
Mon 12/2212:05 pmOPO - SAN
2 stops42h 32mMultiple Airlines
Deal found 6/11$621
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:19 amSMF - OPO
2 stops21h 26mAmerican Airlines
Sun 11/238:20 amOPO - SMF
2 stops21h 19mAmerican Airlines
Deal found 6/11$657
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:00 amONT - OPO
2 stops24h 25mUnited Airlines
Sat 12/136:00 amOPO - ONT
2 stops24h 26mUnited Airlines
Deal found 6/11$664
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/234:55 pmSAN - OPO
2 stops32h 25mAir Canada
Wed 10/16:00 amOPO - SAN
2 stops37h 52mAir Canada
Deal found 6/11$734
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/282:20 pmSMF - OPO
2 stops35h 15mUnited Airlines
Tue 10/76:00 amOPO - SMF
2 stops24h 58mUnited Airlines
Deal found 6/11$749
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/46:24 pmSJC - OPO
2 stops54h 56mMultiple Airlines
Wed 8/206:15 amOPO - SJC
2 stops23h 03mMultiple Airlines
Deal found 6/10$753
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/412:46 pmONT - OPO
2 stops19h 09mIberia
Wed 8/208:15 amOPO - ONT
2 stops22h 33mIberia
Deal found 6/11$768
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.
Wed 9/2410:00 amSAN - OPO
2 stops21h 30mDelta
Thu 10/24:20 pmOPO - SAN
2 stops27h 01mDelta
Deal found 6/11$785
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/25:25 amLAX - OPO
2 stops25h 40mMultiple Airlines
Sun 9/76:25 amOPO - LAX
1 stop19h 05mMultiple Airlines
Deal found 6/10$787

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 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

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Mon 8/4

8:10 am-10:25 pm

2 stops30h 15m

Porto

Wed 8/20

7:15 am-7:38 pm

2 stops20h 23m

$640

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Tue 11/18

6:19 am-11:45 am

2 stops21h 26m

Porto

Sun 11/23

8:20 am-9:39 pm

2 stops21h 19m

$657

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 12/3

7:00 am-3:25 pm

2 stops24h 25m

Porto

Sat 12/13

6:00 am-10:26 pm

2 stops24h 26m

$664

SacramentoPorto

SMF - OPO

SMFOPO

Sacramento Intl

Sun 9/28

2:20 pm-9:35 am

2 stops35h 15m

Porto

Tue 10/7

6:00 am-10:58 pm

2 stops24h 58m

$749

San JosePorto

SJC - OPO

SJCOPO

San Jose

Mon 8/4

6:24 pm-9:20 am

2 stops54h 56m

Porto

Wed 8/20

6:15 am-9:18 pm

2 stops23h 03m

$753

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Mon 8/4

12:46 pm-3:55 pm

2 stops19h 09m

Porto

Wed 8/20

8:15 am-10:48 pm

2 stops22h 33m

$768

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Tue 9/2

5:25 am-3:05 pm

2 stops25h 40m

Porto

Sun 9/7

6:25 am-5:30 pm

1 stop19h 05m

$787

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Mon 8/4

9:59 am-3:30 pm

2 stops21h 31m

Porto

Wed 8/20

11:25 am-12:00 pm

1 stop32h 35m

$792

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 8/16

12:05 pm-9:35 am

1 stop13h 30m

Porto

Wed 8/27

6:00 am-4:55 pm

1 stop18h 55m

$794

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sat 8/30

4:40 pm-8:25 pm

1 stop19h 45m

Porto

Mon 9/8

10:35 pm-2:40 pm

1 stop24h 05m

$796

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 $1,047). 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 June 12, 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.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated June 12, 2025.
To help decide which airline to fly from California to Porto, see what other customers have to say about Delta, Porter Airlines and KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Porter Airlines
8.0
Very good
288 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Transat
7.8
Good
396 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 Iberia ($288), TAP AIR PORTUGAL ($367), and United Airlines ($493).

  • 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, 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 $1,047). 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 California?

Book flights to California if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos
Arcos de Valdevez

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$375Average$919FlexibilityNo cancel feeOn-timeN/A
LEVELCheapest$421Average$666FlexibilityNo cancel feeOn-timeN/A
VuelingCheapest$502Average$875FlexibilityNo cancel feeOn-time88%
IberiaCheapest$540Average$1,047FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$547Average$1,097FlexibilityNo cancel feeOn-time76%
DeltaCheapest$553Average$979FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$610Average$957FlexibilityNo cancel feeOn-time79%
American AirlinesCheapest$617Average$1,041FlexibilityNo cancel feeOn-time71%
Scandinavian AirlinesCheapest$624Average$782FlexibilityNo cancel feeOn-time77%
KLMCheapest$648Average$1,001FlexibilityNo cancel feeOn-time75%

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