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Cheap flights from Oakland, California to Porto from $497

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Oakland, California to Porto departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Oakland, California to Porto

Cheap round-trip flights

KLM Logo
5:55 am - 3:30 pmOAK-OPO
25h 35m2 stops
KLM Logo
11:25 am - 4:11 pmOPO-OAK
36h 46m2 stops
$629KLM
Find Deal
Mon, Oct 20 - Mon, Nov 3
Delta Logo
5:55 am - 10:40 amOAK-OPO
44h 45m2 stops
Delta Logo
11:15 am - 4:11 pmOPO-OAK
36h 56m2 stops
$656Delta
Find Deal
Mon, Oct 20 - Mon, Nov 3
Delta Logo
5:55 am - 10:30 amOAK-OPO
44h 35m2 stops
Delta Logo
11:15 am - 11:53 pmOPO-OAK
44h 38m2 stops
$741Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
5:55 am - 10:30 amOAK-OPO
44h 35m2 stops
Delta Logo
11:15 am - 4:31 pmOPO-OAK
37h 16m2 stops
$742Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7
KLM Logo
5:55 am - 10:30 amOAK-OPO
20h 35m2 stops
KLM Logo
4:10 pm - 4:31 pmOPO-OAK
32h 21m2 stops
$753KLM
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
6:00 am - 3:30 pmOAK-OPO
25h 30m2 stops
Delta Logo
6:15 am - 11:53 pmOPO-OAK
25h 38m2 stops
$816Delta
Find Deal
Mon, Sep 22 - Wed, Oct 8
Delta Logo
6:00 am - 8:25 amOAK-OPO
42h 25m2 stops
Delta Logo
6:15 am - 11:53 pmOPO-OAK
25h 38m2 stops
$817Delta
Find Deal
Wed, Sep 24 - Wed, Oct 8
Delta Logo
6:00 am - 3:30 pmOAK-OPO
25h 30m2 stops
Delta Logo
4:20 pm - 11:53 pmOPO-OAK
39h 33m2 stops
$819Delta
Find Deal
Mon, Sep 22 - Tue, Oct 7
British Airways Logo
9:39 am - 7:50 pmOAK-OPO
26h 11m2 stops
British Airways Logo
9:55 am - 12:03 amOPO-OAK
46h 08m2 stops
$1,145British Airways
Find Deal
Mon, Sep 22 - Thu, Oct 9
British Airways Logo
9:39 am - 8:20 pmOAK-OPO
26h 41m2 stops
British Airways Logo
9:55 am - 12:03 amOPO-OAK
46h 08m2 stops
$1,220British Airways
Find Deal
Sun, Sep 21 - Thu, Oct 9

Delta flights from Oakland, California to Porto

Our best Delta deals on Oakland, California to Porto flight tickets
Delta
Oct 20
OAK5:55 amOakland
44h 45m
2 stops
OPO10:40 amPorto
Nov 3
OPO11:15 amPorto
36h 56m
2 stops
OAK4:11 pmOakland
$656
Find similar
Delta
Dec 3
OAK5:55 amOakland
44h 35m
2 stops
OPO10:30 amPorto
Dec 7
OPO11:15 amPorto
44h 38m
2 stops
OAK11:53 pmOakland
$741
Find similar
Delta
Dec 3
OAK5:55 amOakland
44h 35m
2 stops
OPO10:30 amPorto
Dec 7
OPO11:15 amPorto
37h 16m
2 stops
OAK4:31 pmOakland
$742
Find similar

KLM flights from Oakland, California to Porto

Our best KLM deals on Oakland, California to Porto flight tickets
KLM
Oct 20
OAK5:55 amOakland
25h 35m
2 stops
OPO3:30 pmPorto
Nov 3
OPO11:25 amPorto
36h 46m
2 stops
OAK4:11 pmOakland
$629
Find similar
KLM
Dec 3
OAK5:55 amOakland
20h 35m
2 stops
OPO10:30 amPorto
Dec 7
OPO4:10 pmPorto
32h 21m
2 stops
OAK4:31 pmOakland
$753
Find similar
KLM
Oct 11
OAK5:55 amOakland
28h 15m
2 stops
OPO6:10 pmPorto
Oct 18
OPO4:20 pmPorto
31h 51m
2 stops
OAK4:11 pmOakland
$890
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Oakland, California 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, momondo users made 832,500 searches. Data last updated August 28, 2025.
Use the filters below to find and compare flights from Oakland, California to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 10/20

5:55 am-3:30 pm

2 stops25h 35m

Porto

Mon 11/3

11:25 am-4:11 pm

2 stops36h 46m

$629

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 10/20

5:55 am-10:40 am

2 stops44h 45m

Porto

Mon 11/3

11:15 am-4:11 pm

2 stops36h 56m

$656

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 12/3

5:55 am-10:30 am

2 stops44h 35m

Porto

Sun 12/7

11:15 am-11:53 pm

2 stops44h 38m

$741

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 12/3

5:55 am-10:30 am

2 stops44h 35m

Porto

Sun 12/7

11:15 am-4:31 pm

2 stops37h 16m

$742

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 12/3

5:55 am-10:30 am

2 stops20h 35m

Porto

Sun 12/7

4:10 pm-4:31 pm

2 stops32h 21m

$753

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 9/22

6:00 am-3:30 pm

2 stops25h 30m

Porto

Wed 10/8

6:15 am-11:53 pm

2 stops25h 38m

$816

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Wed 9/24

6:00 am-8:25 am

2 stops42h 25m

Porto

Wed 10/8

6:15 am-11:53 pm

2 stops25h 38m

$817

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 9/22

6:00 am-3:30 pm

2 stops25h 30m

Porto

Tue 10/7

4:20 pm-11:53 pm

2 stops39h 33m

$819

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Mon 9/22

9:39 am-7:50 pm

2 stops26h 11m

Porto

Thu 10/9

9:55 am-12:03 am

2 stops46h 08m

$1,145

OaklandPorto

OAK - OPO

OAKOPO

Oakland

Sun 9/21

9:39 am-8:20 pm

2 stops26h 41m

Porto

Thu 10/9

9:55 am-12:03 am

2 stops46h 08m

$1,220

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Porto from

How to get the cheapest flight ticket from Oakland, California to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Thursday when prices can be found for as low as $981. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $1,148. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the afternoon is the cheapest time of day to fly from Oakland, California to Porto when you can find flight prices for as low as $896. Flying to Porto in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,138 on average. Flights to Porto from Oakland, California in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Oakland, California to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Oakland, California to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Oakland, California to Porto (OAK to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Oakland, California to Porto

Direct flights

None
There are no direct flights from Oakland, California to Porto. There are no popular flight routes from Oakland, California to Porto.
Search flight deals

  • How far is Oakland to Porto by plane?

    Oakland and Porto are 5558.9 mi apart from one another. A reasonable flight in good conditions will take 20h 35m.

  • When did momondo last update prices for flights from Oakland Airport to Porto Airport?

    Prices for flights from Oakland Airport to Porto Airport refresh daily.

  • How old do you have to be to fly from Oakland Airport to Porto Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Oakland Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Coimbra
Braga
Matosinhos
Caminha
Guimarães
Lamego
Esposende
Chaves
Arcos de Valdevez
Espinho
Viseu
Ponte de Lima
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Oakland to Porto?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Oakland to Porto for you.

Can I find flights from Oakland to Porto with flexible booking policies on momondo?

All flight searches from Oakland to Porto on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Oakland to Porto?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Oakland to Porto.

I’m not ready to book a flight from Oakland to Porto right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Oakland to Porto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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