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Cheap flights from Portugal to San Francisco from $626

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to San Francisco departing on 9/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Portugal to San Francisco

Recent round-trip flight deals from Portugal to San Francisco

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:10 am - 11:50 pm
OPO
-
OAK
24h 40m
3 stops
Multiple Airlines Logo
12:30 pm - 11:50 pm
OAK
-
OPO
27h 20m
3 stops
$1,010Multiple Airlines
Wed, Jul 15 - Sun, Jul 19
Delta Logo
11:25 am - 11:52 am
OPO
-
OAK
56h 27m
2 stops
Delta Logo
6:00 am - 9:50 pm
OAK
-
OPO
31h 50m
2 stops
$1,079Delta
Thu, Aug 6 - Thu, Aug 13
British Airways Logo
4:25 pm - 10:55 pm
LIS
-
OAK
38h 30m
2 stops
British Airways Logo
12:05 pm - 9:50 am
OAK
-
LIS
38h 45m
2 stops
$1,084British Airways
Wed, Oct 21 - Sun, Oct 25
British Airways Logo
4:25 pm - 10:55 pm
LIS
-
OAK
38h 30m
2 stops
British Airways Logo
12:05 pm - 9:50 am
OAK
-
LIS
38h 45m
2 stops
$1,086British Airways
Wed, Oct 21 - Sun, Oct 25
Delta Logo
11:25 am - 11:52 am
OPO
-
OAK
56h 27m
2 stops
Delta Logo
5:00 pm - 3:30 pm
OAK
-
OPO
38h 30m
2 stops
$1,090Delta
Thu, Aug 6 - Sat, Aug 15
Delta Logo
11:25 am - 11:52 am
OPO
-
OAK
56h 27m
2 stops
Delta Logo
5:00 pm - 8:30 am
OAK
-
OPO
55h 30m
2 stops
$1,092Delta
Thu, Aug 6 - Fri, Aug 14
KLM Logo
5:00 am - 11:50 pm
OPO
-
OAK
26h 50m
2 stops
KLM Logo
12:30 pm - 10:15 pm
OAK
-
OPO
25h 45m
2 stops
$1,144KLM
Wed, Jul 15 - Sun, Jul 19
Delta Logo
5:00 am - 4:21 pm
OPO
-
OAK
19h 21m
2 stops
Delta Logo
6:00 am - 3:25 pm
OAK
-
OPO
25h 25m
2 stops
$1,162Delta
Fri, Jul 31 - Thu, Aug 13
Delta Logo
5:55 am - 11:56 pm
OPO
-
OAK
26h 01m
2 stops
Delta Logo
5:00 pm - 10:15 pm
OAK
-
OPO
21h 15m
2 stops
$1,164Delta
Fri, Aug 14 - Fri, Aug 21
Air France Logo
5:35 am - 4:14 pm
LIS
-
OAK
18h 39m
2 stops
Air France Logo
6:00 am - 5:50 pm
OAK
-
LIS
27h 50m
2 stops
$1,198Air France
Sat, Aug 15 - Sat, Aug 22

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Delta flights from Portugal to Oakland, California

Our best Delta deals on Portugal to Oakland, California flight tickets
Delta
Aug 6
OPO11:25 amPorto
56h 27m
2 stops
OAK11:52 amOakland
Aug 13
OAK6:00 amOakland
31h 50m
2 stops
OPO9:50 pmPorto
$1,079
Delta
Aug 6
OPO11:25 amPorto
56h 27m
2 stops
OAK11:52 amOakland
Aug 15
OAK5:00 pmOakland
38h 30m
2 stops
OPO3:30 pmPorto
$1,090
Delta
Aug 6
OPO11:25 amPorto
56h 27m
2 stops
OAK11:52 amOakland
Aug 14
OAK5:00 pmOakland
55h 30m
2 stops
OPO8:30 amPorto
$1,092

British Airways flights from Portugal to Oakland, California

Our best British Airways deals on Portugal to Oakland, California flight tickets
British Airways
Oct 21
LIS4:25 pmLisbon Humberto Delgado
38h 30m
2 stops
OAK10:55 pmOakland
Oct 25
OAK12:05 pmOakland
38h 45m
2 stops
LIS9:50 amLisbon Humberto Delgado
$1,084
British Airways
Oct 21
LIS4:25 pmLisbon Humberto Delgado
38h 30m
2 stops
OAK10:55 pmOakland
Oct 25
OAK12:05 pmOakland
38h 45m
2 stops
LIS9:50 amLisbon Humberto Delgado
$1,086
British Airways
Aug 1
OPO7:55 pmPorto
33h 46m
2 stops
OAK9:41 pmOakland
Aug 15
OAK2:55 pmOakland
45h 40m
2 stops
OPO8:35 pmPorto
$1,411

momondo Fare Finder

 
Customize your flight search to find flights from Portugal to Oakland, California 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 July 1, 2026.
Use the filters below to find and compare flights from Portugal to Oakland, California that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoOakland

OPO - OAK

OPOOAK

Porto

Wed 7/15

7:10 am-11:50 pm

3 stops24h 40m

Oakland

Sun 7/19

12:30 pm-11:50 pm

3 stops27h 20m

$1,010

PortoOakland

OPO - OAK

OPOOAK

Porto

Thu 8/6

11:25 am-11:52 am

2 stops56h 27m

Oakland

Thu 8/13

6:00 am-9:50 pm

2 stops31h 50m

$1,079

LisbonOakland

LIS - OAK

LISOAK

Lisbon Humberto Delgado

Wed 10/21

4:25 pm-10:55 pm

2 stops38h 30m

Oakland

Sun 10/25

12:05 pm-9:50 am

2 stops38h 45m

$1,084

LisbonOakland

LIS - OAK

LISOAK

Lisbon Humberto Delgado

Wed 10/21

4:25 pm-10:55 pm

2 stops38h 30m

Oakland

Sun 10/25

12:05 pm-9:50 am

2 stops38h 45m

$1,086

PortoOakland

OPO - OAK

OPOOAK

Porto

Thu 8/6

11:25 am-11:52 am

2 stops56h 27m

Oakland

Sat 8/15

5:00 pm-3:30 pm

2 stops38h 30m

$1,090

PortoOakland

OPO - OAK

OPOOAK

Porto

Thu 8/6

11:25 am-11:52 am

2 stops56h 27m

Oakland

Fri 8/14

5:00 pm-8:30 am

2 stops55h 30m

$1,092

PortoOakland

OPO - OAK

OPOOAK

Porto

Wed 7/15

5:00 am-11:50 pm

2 stops26h 50m

Oakland

Sun 7/19

12:30 pm-10:15 pm

2 stops25h 45m

$1,144
Quickest round-trip

PortoOakland

OPO - OAK

OPOOAK

Porto

Fri 7/31

5:00 am-4:21 pm

2 stops19h 21m

Oakland

Thu 8/13

6:00 am-3:25 pm

2 stops25h 25m

$1,162

PortoOakland

OPO - OAK

OPOOAK

Porto

Fri 8/14

5:55 am-11:56 pm

2 stops26h 01m

Oakland

Fri 8/21

5:00 pm-10:15 pm

2 stops21h 15m

$1,164

LisbonOakland

LIS - OAK

LISOAK

Lisbon Humberto Delgado

Sat 8/15

5:35 am-4:14 pm

2 stops18h 39m

Oakland

Sat 8/22

6:00 am-5:50 pm

2 stops27h 50m

$1,198

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

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

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 airline that flies from Portugal to Oakland?

British Airways and KLM are the most popular carriers operating from Portugal to Oakland

What airlines fly to Oakland, California?

TAP AIR PORTUGAL, United Airlines and Delta are the top three most popular airlines that fly to Oakland, California from Portugal according to our data. TAP AIR PORTUGAL is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Oakland, California. Keep in mind that there are 7 different airlines that fly to Oakland, California on a routine basis, so you have a few additional options to choose from.

Cheap Portugal to Oakland, California flight deals and tips

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

Fastest flight time

24h 40m

Direct flights

None
The fastest flight from Portugal to Oakland, California takes 24h 40m
There are no direct flights from Portugal to Oakland, California. There are no popular flight routes from Portugal to Oakland, California.
Search flight deals

Frequently asked questions about flying from Portugal to Oakland, California

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

    Prices for flights from Portugal to Oakland Airport are updated daily.

  • How old do you have to be to fly from Portugal to Oakland 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 Portugal to Oakland Airport.

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

    The necessary travel and health documents for your Oakland Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portugal to Oakland. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Portugal to Oakland flights to just show those with flexible booking policies.

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

Once you have performed a search for Portugal to Oakland flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Oakland from Portugal. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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