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$557+ Cheap flights from Oakland, CA (OAK) 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — OPO
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
1 adult, Economy
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Cheap flight deals from Oakland to Porto

Best flights from Oakland to Porto
Discover carefully curated flight deals from Oakland to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated diciembre 12, 2025.

This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 1/25:53 amOAK - OPO
2 stops44h 37mKLM
mar. 1/611:25 amOPO - OAK
2 stops36h 49mKLM
Deal found 12/11$2,786

Find 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 diciembre 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$2,786
(KLM)

One-way from

$557
(Delta)

Popular in

July

Cheapest in

January

Average price

$925
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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One-way flight from Oakland to Porto
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($238 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 diciembre 12, 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

vie. 1/2

5:53 am-10:30 am

2 stops44h 37m

Porto

mar. 1/6

11:25 am-4:14 pm

2 stops36h 49m

$2,786

OaklandPorto

OAK - OPO

OAKOPO

Oakland

mié. 2/25

5:55 am-10:30 am

2 stops20h 35m

$557

OaklandPorto

OAK - OPO

OAKOPO

Oakland

lun. 2/23

5:55 am-10:30 am

2 stops20h 35m

$557

OaklandPorto

OAK - OPO

OAKOPO

Oakland

dom. 2/22

5:55 am-10:30 am

2 stops20h 35m

$557

OaklandPorto

OAK - OPO

OAKOPO

Oakland

mar. 2/24

5:55 am-10:30 am

2 stops20h 35m

$557

OaklandPorto

OAK - OPO

OAKOPO

Oakland

sáb. 2/21

12:37 pm-10:30 am

2 stops37h 53m

$570

OaklandPorto

OAK - OPO

OAKOPO

Oakland

jue. 2/19

5:55 am-10:30 am

2 stops44h 35m

$613

OaklandPorto

OAK - OPO

OAKOPO

Oakland

vie. 2/20

5:55 am-10:30 am

2 stops44h 35m

$613

OaklandPorto

OAK - OPO

OAKOPO

Oakland

dom. 4/12

5:55 am-3:30 pm

2 stops25h 35m

$747

OaklandPorto

OAK - OPO

OAKOPO

Oakland

dom. 4/12

11:25 pm-7:20 pm

3 stops35h 55m

$872

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 11 results
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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 $541). Flying from Oakland, California to Porto in July is currently the most expensive (average of $806). 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?

    KLM can get you from Oakland, California to Porto in just under 44h 37m. Your travel time can differ by up to . Airlines will cover a distance of 5555 mi.

  • 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 $541). Flying from Oakland, California to Porto in July is currently the most expensive (average of $806). 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

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