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$579+ 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 6/22. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — OPO
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
1 adult, Economy
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Cheap 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 March 11, 2026.

This Delta deal was found by Cheapflights users on 3/6. 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 4/75:55 am
OAK
-
OPO
2 stops28h 25m
Delta
Tue 4/1411:30 am
OPO
-
OAK
2 stops44h 24m
Delta
Deal found 3/6$841
This Delta deal was found by Cheapflights users on 3/6. 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 4/75:55 am
OAK
-
OPO
2 stops28h 25m
Delta
Wed 4/155:55 am
OPO
-
OAK
2 stops25h 59m
Delta
Deal found 3/6$848
This Delta deal was found by Cheapflights users on 3/6. 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 4/65:55 am
OAK
-
OPO
2 stops45h 00m
Delta
Tue 4/1411:30 am
OPO
-
OAK
2 stops44h 24m
Delta
Deal found 3/6$946
This Delta deal was found by Cheapflights users on 3/6. 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 4/65:55 am
OAK
-
OPO
2 stops32h 20m
Delta
Wed 4/155:55 am
OPO
-
OAK
2 stops25h 59m
Delta
Deal found 3/6$953
This Delta deal was found by Cheapflights users on 3/6. 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 4/512:35 pm
OAK
-
OPO
2 stops38h 05m
Delta
Tue 4/1411:30 am
OPO
-
OAK
2 stops44h 24m
Delta
Deal found 3/6$1,011
This Delta deal was found by Cheapflights users on 3/6. 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 4/512:35 pm
OAK
-
OPO
2 stops38h 05m
Delta
Thu 4/165:55 am
OPO
-
OAK
2 stops18h 29m
Delta
Deal found 3/6$1,018
This Delta deal was found by Cheapflights users on 3/6. 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 4/75:55 am
OAK
-
OPO
2 stops28h 25m
Delta
Mon 4/1311:25 am
OPO
-
OAK
2 stops36h 59m
Delta
Deal found 3/6$1,021
This Delta deal was found by Cheapflights users on 3/6. 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 4/95:55 am
OAK
-
OPO
2 stops32h 05m
Delta
Tue 4/1411:30 am
OPO
-
OAK
2 stops44h 24m
Delta
Deal found 3/6$1,064
This Delta deal was found by Cheapflights users on 3/6. 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 4/95:55 am
OAK
-
OPO
2 stops32h 05m
Delta
Thu 4/165:55 am
OPO
-
OAK
2 stops18h 29m
Delta
Deal found 3/6$1,071
This Delta deal was found by Cheapflights users on 3/6. 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 4/65:55 am
OAK
-
OPO
2 stops32h 20m
Delta
Mon 4/1311:25 am
OPO
-
OAK
2 stops36h 59m
Delta
Deal found 3/6$1,126
This Delta deal was found by Cheapflights users on 3/6. 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 4/75:55 am
OAK
-
OPO
2 stops28h 25m
Delta
Sun 4/1211:45 am
OPO
-
OAK
2 stops44h 09m
Delta
Deal found 3/6$1,144
This Delta deal was found by Cheapflights users on 3/6. 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 4/54:49 pm
OAK
-
OPO
2 stops33h 51m
Delta
Mon 4/1311:25 am
OPO
-
OAK
2 stops36h 59m
Delta
Deal found 3/6$1,191

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 March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$841
(Delta)

One-way from

$579
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$737
Provider with most accurate pricing for San Francisco-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Porto flights.
Search Deals
From Oakland to Porto
Search Deals
One-way flight from Oakland to Porto
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($277 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 11, 2026.
Use the filters below to find and compare flights from Oakland to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Tue 4/7

5:55 am-6:20 pm

2 stops28h 25m

Porto

Tue 4/14

11:30 am-11:54 pm

2 stops44h 24m

$841
Quickest round-trip

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 4/5

12:35 pm-10:40 am

2 stops38h 05m

Porto

Thu 4/16

5:55 am-4:24 pm

2 stops18h 29m

$1,018

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 4/8

5:55 am-10:40 am

2 stops44h 45m

Porto

Mon 4/13

11:25 am-11:54 pm

2 stops44h 29m

$1,126

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Tue 4/7

5:55 am-6:20 pm

2 stops28h 25m

Porto

Sun 4/12

11:45 am-11:54 pm

2 stops44h 09m

$1,144

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 4/5

4:49 pm-10:40 am

2 stops33h 51m

Porto

Mon 4/13

11:25 am-4:24 pm

2 stops36h 59m

$1,191

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Thu 4/9

5:55 am-10:00 pm

2 stops32h 05m

Porto

Mon 4/13

11:25 am-11:54 pm

2 stops44h 29m

$1,244

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sat 5/9

2:09 pm-11:30 pm

2 stops25h 21m

Porto

Fri 5/22

10:40 am-11:59 pm

2 stops45h 19m

$1,265

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Fri 4/24

6:20 am-9:45 am

2 stops43h 25m

Porto

Fri 5/1

4:45 pm-10:32 pm

2 stops37h 47m

$1,284

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 5/18

6:00 am-10:15 pm

2 stops32h 15m

Porto

Thu 5/28

7:10 pm-4:25 pm

2 stops29h 15m

$1,536

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Thu 5/21

7:00 am-11:30 pm

2 stops32h 30m

Porto

Tue 5/26

4:50 pm-11:59 pm

2 stops39h 09m

$2,038

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/10

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

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, April is the cheapest month in which you can book a flight from Oakland, California to Porto (average of $431). Flying from Oakland, California to Porto in June is currently the most expensive (average of $901). 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 can get you from Oakland, California to Porto in just under 28h 25m. 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, April is the cheapest month in which you can book a flight from Oakland, California to Porto (average of $431). Flying from Oakland, California to Porto in June is currently the most expensive (average of $901). 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
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

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