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$320+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — LIS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap 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 January 29, 2026.

This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/165:55 am
OAK
-
LIS
2 stops24h 40m
Delta
Tue 3/311:25 am
LIS
-
OAK
2 stops36h 47m
Delta
Deal found 1/26$512
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/174:59 pm
OAK
-
LIS
2 stops37h 36m
Delta
Thu 3/511:25 am
LIS
-
OAK
2 stops44h 26m
Delta
Deal found 1/26$517
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/165:55 am
OAK
-
LIS
2 stops44h 40m
Delta
Fri 2/275:30 am
LIS
-
OAK
2 stops26h 21m
Delta
Deal found 1/26$518
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/174:59 pm
OAK
-
LIS
2 stops57h 36m
Delta
Fri 2/275:30 am
LIS
-
OAK
2 stops18h 42m
Delta
Deal found 1/26$523
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/165:55 am
OAK
-
LIS
2 stops24h 40m
Delta
Fri 3/610:55 am
LIS
-
OAK
2 stops20h 56m
Delta
Deal found 1/26$526
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/174:59 pm
OAK
-
LIS
2 stops57h 36m
Delta
Fri 3/610:55 am
LIS
-
OAK
2 stops20h 56m
Delta
Deal found 1/26$531
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/195:55 am
OAK
-
LIS
2 stops27h 35m
Delta
Tue 3/311:25 am
LIS
-
OAK
2 stops44h 26m
Delta
Deal found 1/26$556
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/165:55 am
OAK
-
LIS
2 stops24h 40m
Delta
Sun 3/111:25 am
LIS
-
OAK
2 stops44h 26m
Delta
Deal found 1/26$562
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/174:59 pm
OAK
-
LIS
2 stops37h 36m
Delta
Sun 3/111:25 am
LIS
-
OAK
2 stops44h 26m
Delta
Deal found 1/26$567
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/195:55 am
OAK
-
LIS
2 stops21h 25m
Delta
Fri 3/610:55 am
LIS
-
OAK
2 stops20h 56m
Delta
Deal found 1/26$570
This Delta deal was found by Cheapflights users on 1/27. 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.
Sun 3/294:49 pm
OAK
-
LIS
2 stops56h 01m
Delta
Wed 4/811:55 am
LIS
-
OAK
2 stops43h 51m
Delta
Deal found 1/27$582
This Delta deal was found by Cheapflights users on 1/27. 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.
Sun 3/294:49 pm
OAK
-
LIS
2 stops56h 01m
Delta
Thu 4/95:35 am
LIS
-
OAK
2 stops26h 11m
Delta
Deal found 1/27$589

Find flight deals from Oakland to Portugal

Keep the following information in mind while searching for Oakland to Portugal flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$512
(Delta)

One-way from

$320
(oojo)

Popular in

June

Cheapest in

January

Average price

$643
Provider with most accurate pricing for San Francisco-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Lisbon Humberto Delgado flights.
Search Deals
From Oakland to Portugal
Search Deals
One-way flight from Oakland to Portugal
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($156 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 2026.
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

Wed 2/18

5:55 am-2:35 pm

2 stops24h 40m

Lisbon Humberto Delgado

Thu 3/5

11:25 am-4:12 pm

2 stops36h 47m

$512

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Mon 2/16

5:55 am-10:35 am

2 stops44h 40m

Lisbon Humberto Delgado

Thu 3/5

11:25 am-11:51 pm

2 stops44h 26m

$512

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Mon 2/16

5:55 am-2:35 pm

2 stops24h 40m

Lisbon Humberto Delgado

Fri 3/6

10:55 am-11:51 pm

2 stops20h 56m

$526

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Fri 2/20

5:55 am-11:20 am

2 stops21h 25m

Lisbon Humberto Delgado

Wed 3/4

11:25 am-11:51 pm

2 stops44h 26m

$556

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Thu 2/19

5:55 am-5:30 pm

2 stops27h 35m

Lisbon Humberto Delgado

Tue 3/3

11:25 am-11:51 pm

2 stops44h 26m

$556

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Thu 2/19

5:55 am-11:20 am

2 stops21h 25m

Lisbon Humberto Delgado

Mon 3/2

11:25 am-11:51 pm

2 stops44h 26m

$556

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Mon 2/16

5:55 am-2:35 pm

2 stops24h 40m

Lisbon Humberto Delgado

Sun 3/1

11:25 am-11:51 pm

2 stops44h 26m

$562

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Thu 2/19

5:55 am-5:30 pm

2 stops27h 35m

Lisbon Humberto Delgado

Fri 2/27

5:30 am-11:51 pm

2 stops26h 21m

$562

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Tue 2/17

4:59 pm-2:35 pm

2 stops37h 36m

Lisbon Humberto Delgado

Sun 3/1

11:25 am-11:51 pm

2 stops44h 26m

$567

OaklandLisbon

OAK - LIS

OAKLIS

Oakland

Wed 2/18

5:55 am-2:35 pm

2 stops24h 40m

Lisbon Humberto Delgado

Sat 2/28

11:25 am-4:12 pm

2 stops36h 47m

$635

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 45 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, March is the cheapest month in which you can book a flight from Oakland, California to Portugal (average of $468). Flying from Oakland, California to Portugal in June is currently the most expensive (average of $761). 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 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 $1,150, Delta can have you in Portugal from Oakland, California in 24h 32m. Oakland, California and Portugal are separated by a distance of 5555 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 - Ponta Delgada Nordela.

  • 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, March is the cheapest month in which you can book a flight from Oakland, California to Portugal (average of $468). Flying from Oakland, California to Portugal in June is currently the most expensive (average of $761). 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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