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$546+ Cheap flights from Oakland, CA (OAK) to Porto (OPO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — OPO
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap flight deals from Oakland to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Oakland (OAK) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$546
(Delta)

Popular in

July

Cheapest in

January

Average price

$720
Provider with most accurate pricing for San Francisco-Porto flight deals.
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Provider most trusted by Cheapflights users for San Francisco-Porto flights.
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From Oakland to Porto
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Highest demand for flights based on searches. 18% potential increase in price ($212 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Oakland to Porto

Cheapest flights from Oakland to Porto
Explore the most affordable flight options available from Oakland to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This Delta deal was found by Cheapflights users on 10/27. 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 12/35:55 amOAK - OPO
2 stops44h 35mDelta
Sun 12/711:15 amOPO - OAK
2 stops44h 53mDelta
Deal found 10/27$546
This KLM deal was found by Cheapflights users on 10/26. 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.
Sun 11/305:55 amOAK - OPO
2 stops20h 35mKLM
Mon 12/86:30 amOPO - OAK
2 stops41h 34mKLM
Deal found 10/26$641
This Orbitz deal was found by Cheapflights users on 10/26. 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.
Sun 12/216:10 amOAK - OPO
2 stops43h 40mMultiple Airlines
Wed 12/314:10 pmOPO - OAK
2 stops39h 49mMultiple Airlines
Deal found 10/26$2,762
This Orbitz deal was found by Cheapflights users on 10/26. 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.
Sun 12/216:10 amOAK - OPO
2 stops43h 40mMultiple Airlines
Sat 1/34:10 pmOPO - OAK
2 stops48h 56mMultiple Airlines
Deal found 10/26$2,796
This Mytrip deal was found by Cheapflights users on 10/26. 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 12/2111:30 pmOAK - OPO
3 stops35h 50mMultiple Airlines
Fri 1/28:10 pmOPO - OAK
3 stops33h 20mMultiple Airlines
Deal found 10/26$2,845
This Mytrip deal was found by Cheapflights users on 10/26. 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 12/1811:30 pmOAK - OPO
3 stops31h 45mMultiple Airlines
Wed 12/3110:55 amOPO - OAK
3 stops32h 50mMultiple Airlines
Deal found 10/26$2,852
This Trip.com deal was found by Cheapflights users on 10/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:01 pmOAK - OPO
3 stops25h 29mMultiple Airlines
Thu 1/17:10 amOPO - OAK
2 stops24h 49mMultiple Airlines
Deal found 10/26$2,951
This Expedia deal was found by Cheapflights users on 10/26. 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.
Thu 12/186:10 amOAK - OPO
2 stops49h 00mMultiple Airlines
Mon 1/510:55 amOPO - OAK
2 stops45h 04mMultiple Airlines
Deal found 10/26$2,972

Cheapflights Fare Finder

 
Customize your flight search to find flights from Oakland 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 October 28, 2025.
Use the filters below to find and compare flights from Oakland to Porto that are best for you.

Fly from

Oakland

Fly to

Porto

Route

Depart

Return

Price

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 12/3

12:30 pm-10:30 am

2 stops38h 00m

Porto

Sun 12/7

11:15 am-12:08 am

2 stops44h 53m

$546

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 2/25

5:55 am-10:30 am

2 stops20h 35m

Porto

Mon 3/2

11:15 am-4:34 pm

2 stops37h 19m

$566

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 2/25

5:55 am-10:30 am

2 stops20h 35m

Porto

Sun 3/1

11:25 am-4:34 pm

2 stops37h 09m

$634

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 11/30

5:55 am-10:30 am

2 stops20h 35m

Porto

Mon 12/8

6:30 am-4:04 pm

2 stops41h 34m

$641

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 11/30

5:55 am-10:30 am

2 stops20h 35m

Porto

Wed 12/10

4:10 pm-4:04 pm

2 stops31h 54m

$641

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 12/1

5:55 am-10:30 am

2 stops20h 35m

Porto

Tue 12/9

6:05 am-4:04 pm

2 stops41h 59m

$641

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 11/30

5:55 am-10:30 am

2 stops20h 35m

Porto

Tue 12/9

6:05 am-4:04 pm

2 stops41h 59m

$641

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 12/1

5:55 am-10:30 am

2 stops20h 35m

Porto

Wed 12/10

11:15 am-12:08 am

2 stops44h 53m

$641

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 12/1

5:55 am-10:30 am

2 stops20h 35m

Porto

Mon 12/8

6:30 am-4:04 pm

2 stops41h 34m

$641

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Thu 2/26

5:55 am-10:30 am

2 stops44h 35m

Porto

Sun 3/1

11:15 am-11:53 pm

2 stops44h 38m

$821

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 11 results
1
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Best time to book a flight from Oakland to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Oakland 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 Oakland to Porto

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

Currently, January is the cheapest month in which you can book a flight from Oakland, California to Porto (average of $535). Flying from Oakland, 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.

Related info for your journey

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

  • How long is the flight from Oakland, California to Porto?

    Delta and KLM can get you from Oakland, California to Porto in just under 20h 35m. Your travel time can differ by up to 17h 25m. Airlines will cover a distance of 5555 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Oakland 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 Oakland, California to Porto?

    Currently, January is the cheapest month in which you can book a flight from Oakland, California to Porto (average of $535). Flying from Oakland, 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

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