HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$556+ 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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — OPO
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Oakland to Porto with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 11, 2025.

Round-trip from

$641
(Delta)

One-way from

$556
(British Airways)

Popular in

July

Cheapest in

January

Average price

$927
From Oakland to Porto
Search Deals
One-way flight from Oakland to Porto
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($225 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 11, 2025.

This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:45 amOAK - OPO
2 stops20h 45mDelta
Sun 12/76:30 amOPO - OAK
2 stops41h 44mDelta
Deal found 9/10$641
This KLM deal was found by Cheapflights users on 9/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:45 amOAK - OPO
2 stops20h 45mKLM
Sun 12/76:30 amOPO - OAK
2 stops41h 44mKLM
Deal found 9/9$693
This Air France deal was found by Cheapflights users on 9/11. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/265:55 amOAK - OPO
2 stops21h 35mMultiple Airlines
Sun 11/211:15 amOPO - OAK
2 stops36h 56mMultiple Airlines
Deal found 9/11$731

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 September 11, 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

5:45 am-10:30 am

2 stops20h 45m

Porto

Sun 12/7

6:30 am-4:14 pm

2 stops41h 44m

$641

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 12/3

5:45 am-10:30 am

2 stops20h 45m

Porto

Sun 12/7

6:30 am-4:14 pm

2 stops41h 44m

$693

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 10/26

5:55 am-10:30 am

2 stops21h 35m

Porto

Sun 11/2

11:15 am-4:11 pm

2 stops36h 56m

$731

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 10/13

6:40 am-7:50 pm

2 stops29h 10m

$556

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

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 $523). Flying from Oakland, 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.

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 45m. 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 $523). Flying from Oakland, 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Oakland to Porto

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Lisbon flights
Los Angeles to Lisbon flights
San Diego to Lisbon flights
Santa Ana to Lisbon flights
San Francisco to Porto flights
Ontario to Lisbon flights
Los Angeles to Porto flights
San Jose to Lisbon flights
Sacramento to Lisbon flights
San Francisco to Faro flights
Oakland to Lisbon flights
Reno to Lisbon flights
Las Vegas to Lisbon flights
Ontario to Porto flights
Los Angeles to Funchal flights
Long Beach to Lisbon flights
Santa Rosa to Lisbon flights
San Francisco to Funchal flights
Burbank to Lisbon flights
San Francisco to Ponta Delgada flights
San Jose to Faro flights
Los Angeles to Ponta Delgada flights
Los Angeles to Faro flights
San Francisco to Lajes flights
Sacramento to Porto flights
Santa Ana to Porto flights
San Jose to Porto flights
Ontario to Faro flights
Fresno to Lisbon flights
San Jose to Funchal flights
San Diego to Porto flights
San Diego to Faro flights
Monterey to Lisbon flights
Las Vegas to Funchal flights
Palm Springs to Lisbon flights
San Francisco to Velas flights
Los Angeles to Lajes flights
Burbank to Porto flights
San Francisco to Horta flights
Las Vegas to Faro flights
Santa Ana to Faro flights
Long Beach to Faro flights
Santa Barbara to Lisbon flights
Oakland to Faro flights
San Francisco to Porto Santo flights
Yuma to Lisbon flights
Oakland to Funchal flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.