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Portugal

$520+ Cheap flights from Oakland, CA (OAK) to Portugal

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — LIS
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Oakland to Portugal

Keep the following information in mind while searching for Oakland to Portugal flight deals. Data was last updated September 11, 2025.

Round-trip from

$565
(Delta)

One-way from

$520
(Cheapflightsfares)

Popular in

December

Cheapest in

January

Average price

$855
From Oakland to Portugal
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One-way flight from Oakland to Portugal
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High demand for flights, 0% potential price rise
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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 September 2025
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Find flight deals from Oakland to Portugal

Cheapest flights from Oakland to Portugal
Explore the most affordable flight options available from Oakland to Portugal. 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 9/11. 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.
Tue 11/45:55 amOAK - LIS
2 stops25h 15mDelta
Thu 11/135:30 amLIS - OAK
2 stops26h 33mDelta
Deal found 9/11$540
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:55 amOAK - LIS
2 stops27h 35mDelta
Tue 11/1112:20 pmLIS - OAK
2 stops43h 43mDelta
Deal found 9/11$553
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:55 amOAK - LIS
2 stops25h 15mDelta
Mon 11/1011:25 amLIS - OAK
2 stops44h 38mDelta
Deal found 9/11$555
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.
Thu 11/275:45 amOAK - LIS
2 stops18h 15mDelta
Fri 12/510:55 amLIS - OAK
2 stops21h 13mDelta
Deal found 9/10$565
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.
Mon 12/14:51 pmOAK - LIS
2 stops55h 09mDelta
Sun 12/711:15 amLIS - OAK
2 stops20h 53mDelta
Deal found 9/10$575
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 11/264:51 pmOAK - LIS
2 stops31h 09mDelta
Fri 12/510:55 amLIS - OAK
2 stops21h 13mDelta
Deal found 9/10$577
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 11/264:51 pmOAK - LIS
2 stops31h 09mDelta
Tue 12/210:00 amLIS - OAK
2 stops46h 08mDelta
Deal found 9/10$587
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.
Thu 11/275:45 amOAK - LIS
2 stops18h 15mDelta
Tue 12/211:25 amLIS - OAK
2 stops36h 49mDelta
Deal found 9/10$590
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/226:00 amOAK - LIS
2 stops24h 50mDelta
Thu 10/25:40 amLIS - OAK
2 stops26h 10mDelta
Deal found 9/11$610
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.
Thu 11/275:45 amOAK - LIS
2 stops18h 15mDelta
Sun 12/711:15 amLIS - OAK
2 stops20h 53mDelta
Deal found 9/10$615
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/215:05 pmOAK - LIS
2 stops40h 45mDelta
Thu 10/25:40 amLIS - OAK
2 stops26h 10mDelta
Deal found 9/11$616
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

Cheapflights Fare Finder

 
Customize your flight search to find flights from Oakland to Portugal 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 Portugal that are best for you.

Fly from

Oakland

Fly to

Portugal

Route

Depart

Return

Price

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Fri 11/28

5:45 am-8:00 am

2 stops18h 15m

Lisbon Humberto Delgado

Tue 12/2

10:00 am-4:14 pm

2 stops38h 14m

$575

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Thu 11/27

5:45 am-8:00 am

2 stops18h 15m

Lisbon Humberto Delgado

Tue 12/2

10:00 am-4:14 pm

2 stops38h 14m

$575

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Mon 12/1

4:51 pm-8:00 am

2 stops55h 09m

Lisbon Humberto Delgado

Sun 12/7

11:15 am-12:08 am

2 stops20h 53m

$575

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Fri 11/28

5:45 am-8:00 am

2 stops18h 15m

Lisbon Humberto Delgado

Sun 12/7

11:15 am-12:08 am

2 stops20h 53m

$615

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Mon 9/22

6:00 am-2:50 pm

2 stops24h 50m

Lisbon Humberto Delgado

Wed 10/1

9:50 am-4:24 pm

2 stops38h 34m

$623

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Wed 11/26

4:51 pm-8:00 am

2 stops31h 09m

Lisbon Humberto Delgado

Sun 12/7

11:15 am-12:08 am

2 stops20h 53m

$627

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Wed 11/19

12:28 pm-8:00 am

2 stops35h 32m

Lisbon Humberto Delgado

Thu 11/27

10:40 am-10:53 pm

2 stops44h 13m

$633

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Thu 1/1

5:53 am-11:20 am

2 stops21h 27m

Lisbon Humberto Delgado

Sat 1/31

5:30 am-10:53 pm

2 stops25h 23m

$640

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

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Sun 11/30

5:45 am-11:20 am

2 stops21h 35m

Lisbon Humberto Delgado

Sun 12/7

11:15 am-12:08 am

2 stops20h 53m

$690

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 25 results
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Best time to book a flight from Oakland to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal 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 Portugal

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

Currently, January is the cheapest month in which you can book a flight from Oakland, California to Portugal (average of $612). Flying from Oakland, California to Portugal in June is currently the most expensive (average of $1,127). 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 OAK to PT?

Find hourly flight availability from Oakland to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Oakland, California to Portugal as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Oakland to Portugal. 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 from for flights from Oakland to Portugal?

    If you book a flight to Portugal from Oakland, you will be flying from Oakland, which is the city’s only airport. Oakland (OAK) is located 7.0 mi from the center of Oakland.

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

    For as low as $575, Delta can have you in Portugal from Oakland, California in 18h 15m. Oakland, California and Portugal are separated by a distance of 5653 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Oakland, California to Portugal?

    The most popular flight routes from Oakland, California to Portugal are Oakland - Lisbon Humberto Delgado, Oakland - Porto and Oakland - Faro.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Oakland to Portugal 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 Portugal?

    Currently, January is the cheapest month in which you can book a flight from Oakland, California to Portugal (average of $612). Flying from Oakland, California to Portugal in June is currently the most expensive (average of $1,127). 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

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