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$399+ 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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
OAK — OPO
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
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 July 25, 2026.

This Delta deal was found by Cheapflights users on 7/20. 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 8/176:00 am
OAK
-
OPO
2 stops32h 30m
Delta
Tue 8/2511:35 am
OPO
-
OAK
2 stops44h 21m
Delta
Deal found 7/20$850
This Delta deal was found by Cheapflights users on 7/20. 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 8/186:00 am
OAK
-
OPO
2 stops20h 30m
Delta
Tue 8/2511:35 am
OPO
-
OAK
2 stops44h 21m
Delta
Deal found 7/20$851
This Air France deal was found by Cheapflights users on 7/20. 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.
Tue 8/186:00 am
OAK
-
OPO
2 stops20h 30m
Multiple Airlines
Mon 8/2411:25 am
OPO
-
OAK
2 stops36h 49m
Multiple Airlines
Deal found 7/20$976
This Delta deal was found by Cheapflights users on 7/20. 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 8/166:00 am
OAK
-
OPO
2 stops25h 30m
Delta
Tue 8/256:15 am
OPO
-
OAK
2 stops17h 59m
Delta
Deal found 7/20$1,030
This Delta deal was found by Cheapflights users on 7/20. 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 8/176:00 am
OAK
-
OPO
2 stops25h 25m
Delta
Mon 8/246:30 am
OPO
-
OAK
2 stops25h 26m
Delta
Deal found 7/20$1,112
This Delta deal was found by Cheapflights users on 7/20. 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 8/186:00 am
OAK
-
OPO
2 stops20h 30m
Delta
Mon 8/246:30 am
OPO
-
OAK
2 stops25h 26m
Delta
Deal found 7/20$1,113
This KAYAK deal was found by Cheapflights users on 7/22. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am
OAK
-
OPO
2 stops21h 50m
Multiple Airlines
Sat 11/144:10 pm
OPO
-
OAK
2 stops52h 42m
Multiple Airlines
Deal found 7/22$1,135
This Delta deal was found by Cheapflights users on 7/20. 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 8/166:00 am
OAK
-
OPO
2 stops25h 30m
Delta
Mon 8/246:30 am
OPO
-
OAK
2 stops25h 26m
Delta
Deal found 7/20$1,160
This Delta deal was found by Cheapflights users on 7/22. 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 9/65:00 pm
OAK
-
OPO
2 stops21h 15m
Delta
Sat 9/196:10 am
OPO
-
OAK
2 stops23h 51m
Delta
Deal found 7/22$1,187
This KLM deal was found by Cheapflights users on 7/20. 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 9/212:33 pm
OAK
-
OPO
2 stops25h 42m
KLM
Tue 9/86:50 pm
OPO
-
OAK
2 stops37h 09m
KLM
Deal found 7/20$1,225
This Delta deal was found by Cheapflights users on 7/21. 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.
Fri 9/412:33 pm
OAK
-
OPO
2 stops25h 42m
Delta
Fri 9/115:55 am
OPO
-
OAK
2 stops26h 04m
Delta
Deal found 7/21$1,307
This Delta deal was found by Cheapflights users on 7/20. 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 8/176:00 am
OAK
-
OPO
2 stops20h 30m
Delta
Sun 8/2311:45 am
OPO
-
OAK
2 stops20h 11m
Delta
Deal found 7/20$1,413

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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$761
(Air France)

One-way from

$399
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$1,141
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. 18% potential increase in price ($211 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 25, 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 8/18

6:00 am-10:30 am

2 stops20h 30m

Porto

Tue 8/25

11:35 am-11:56 pm

2 stops44h 21m

$851

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 8/17

6:00 am-3:25 pm

2 stops25h 25m

Porto

Mon 8/24

6:30 am-11:56 pm

2 stops25h 26m

$1,112

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Tue 8/18

6:00 am-10:30 am

2 stops20h 30m

Porto

Mon 8/24

6:30 am-11:56 pm

2 stops25h 26m

$1,113

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 11/1

7:00 am-12:50 pm

2 stops21h 50m

Porto

Sat 11/14

4:10 pm-12:52 pm

2 stops52h 42m

$1,135

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 8/16

6:00 am-3:30 pm

2 stops25h 30m

Porto

Mon 8/24

6:30 am-11:56 pm

2 stops25h 26m

$1,160
Quickest round-trip

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 9/6

5:00 pm-10:15 pm

2 stops21h 15m

Porto

Sat 9/19

6:10 am-10:01 pm

2 stops23h 51m

$1,187

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 9/2

12:33 pm-10:15 pm

2 stops25h 42m

Porto

Tue 9/8

6:50 pm-11:59 pm

2 stops37h 09m

$1,225

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Fri 9/4

12:33 pm-10:15 pm

2 stops25h 42m

Porto

Fri 9/11

5:55 am-11:59 pm

2 stops26h 04m

$1,307

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 9/6

6:04 am-11:25 pm

2 stops33h 21m

Porto

Sun 9/13

6:20 am-1:15 pm

2 stops38h 55m

$1,451

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 8/16

6:00 am-3:30 pm

2 stops25h 30m

Porto

Sun 8/23

11:45 am-11:56 pm

2 stops20h 11m

$1,461

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/21

Showing 1-10 of 21 resultsSorted by cheapest first
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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.

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 20h 30m. 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.

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
Arcos de Valdevez
Coimbra
Aveiro

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