What is the cheapest airline that flies from Porto to California?

British Airways, TAP AIR PORTUGAL, and KLM are the most popular carriers operating from Porto to California

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

Prices for flights from Porto Airport to California are refreshed on a daily basis.

How many operators does momondo search for flights from Porto Airport to California?

The number of operators available for flights from Porto Airport to California is 1 as of August 2026.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Porto Airport to California.

What documentation or ID do you need to fly to California?

The travel and health documents you'll need for your trip to California may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at California. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$367 Cheap Flights from Porto to California in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Porto to California

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:50 pm - 2:50 pmOPO Porto-SFO San Francisco

29h 00m1 stop Kastrup Copenhagen

4:45 pm - 4:55 pmSFO San Francisco-OPO Porto

16h 10m1 stop Kastrup Copenhagen

$562Scandinavian Airlines

Thu, Nov 12 - Thu, Nov 26

5:50 pm - 3:50 pmOPO Porto-SFO San Francisco

29h 00m1 stop Kastrup Copenhagen

4:45 pm - 11:10 amSFO San Francisco-OPO Porto

34h 25m1 stop Kastrup Copenhagen

$571Scandinavian Airlines

Thu, Oct 29 - Thu, Nov 5

11:55 am - 2:50 pmOPO Porto-SFO San Francisco

34h 55m1 stop Kastrup Copenhagen

4:45 pm - 8:40 amSFO San Francisco-OPO Porto

31h 55m1 stop Kastrup Copenhagen

$573Scandinavian Airlines

Wed, Nov 11 - Thu, Apr 29

5:50 pm - 2:50 pmOPO Porto-SFO San Francisco

29h 00m1 stop Kastrup Copenhagen

4:45 pm - 11:05 amSFO San Francisco-OPO Porto

34h 20m1 stop Kastrup Copenhagen

$585Scandinavian Airlines

Thu, Nov 5 - Mon, Nov 9

11:55 am - 2:50 pmOPO Porto-SFO San Francisco

34h 55m1 stop Kastrup Copenhagen

4:45 pm - 11:05 amSFO San Francisco-OPO Porto

34h 20m1 stop Kastrup Copenhagen

$596Scandinavian Airlines

Wed, Nov 4 - Mon, Nov 9

12:00 pm - 2:50 pmOPO Porto-SFO San Francisco

34h 50m1 stop Kastrup Copenhagen

4:45 pm - 8:40 amSFO San Francisco-OPO Porto

31h 55m1 stop Kastrup Copenhagen

$613Scandinavian Airlines

Sat, Nov 14 - Thu, Apr 29

5:45 pm - 5:00 pmOPO Porto-LAX Los Angeles

31h 15m1 stop Kastrup Copenhagen

9:45 pm - 4:55 pmLAX Los Angeles-OPO Porto

35h 10m2 stops San Francisco Kastrup Copenhagen

$652Scandinavian Airlines

Fri, Feb 5 - Wed, Feb 10

5:55 pm - 2:40 pmOPO Porto-SFO San Francisco

28h 45m1 stop Kastrup Copenhagen

4:45 pm - 11:00 amSFO San Francisco-OPO Porto

34h 15m1 stop Kastrup Copenhagen

$654Scandinavian Airlines

Fri, Oct 23 - Mon, Apr 19

7:00 am - 2:45 pmOPO Porto-LAX Los Angeles

15h 45m1 stop Lisbon Humberto Delgado

4:40 pm - 10:55 pmLAX Los Angeles-OPO Porto

22h 15m1 stop Lisbon Humberto Delgado

$779TAP AIR PORTUGAL

Tue, Oct 13 - Fri, Oct 23

9:15 pm - 2:45 pmOPO Porto-LAX Los Angeles

25h 30m1 stop Lisbon Humberto Delgado

4:55 pm - 7:00 pmLAX Los Angeles-OPO Porto

18h 05m1 stop Lisbon Humberto Delgado

$781TAP AIR PORTUGAL

Mon, Oct 12 - Sat, Oct 24

Cheap last minute flights

Enter your travel dates to find the best prices.

5:00 am - 11:45 amOPO Porto-SFO San Francisco

14h 45m1 stop Amsterdam Schiphol

8:10 pm - 10:00 pmSFO San Francisco-OPO Porto

17h 50m1 stop Paris Charles de Gaulle

$737Delta

Sat, Sep 5 - Sun, Sep 20

12:15 pm - 8:20 amOPO Porto-LAX Los Angeles

28h 05m1 stop Casablanca Mohamed V

10:20 am - 11:15 amLAX Los Angeles-OPO Porto

16h 55m1 stop Casablanca Mohamed V

$739Royal Air Maroc

Sat, Sep 5 - Fri, Sep 18

5:00 am - 11:45 amOPO Porto-SFO San Francisco

14h 45m1 stop Amsterdam Schiphol

8:10 pm - 10:00 pmSFO San Francisco-OPO Porto

17h 50m1 stop Paris Charles de Gaulle

$739Delta

Fri, Sep 4 - Sun, Sep 20

12:15 pm - 8:20 amOPO Porto-LAX Los Angeles

28h 05m1 stop Casablanca Mohamed V

10:20 am - 11:15 amLAX Los Angeles-OPO Porto

16h 55m1 stop Casablanca Mohamed V

$740Royal Air Maroc

Sat, Sep 5 - Fri, Sep 18

5:00 am - 5:15 pmOPO Porto-SFO San Francisco

20h 15m2 stops Amsterdam Schiphol Minneapolis St Paul

8:10 pm - 10:00 pmSFO San Francisco-OPO Porto

17h 50m1 stop Paris Charles de Gaulle

$742Delta

Sat, Sep 5 - Sun, Sep 20

5:00 am - 4:56 pmOPO Porto-SFO San Francisco

19h 56m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

11:58 am - 3:30 pmSFO San Francisco-OPO Porto

19h 32m2 stops Los Angeles Paris Charles de Gaulle

$744Delta

Fri, Sep 4 - Sun, Sep 20

5:00 am - 5:15 pmOPO Porto-SFO San Francisco

20h 15m2 stops Amsterdam Schiphol Minneapolis St Paul

1:20 pm - 7:05 pmSFO San Francisco-OPO Porto

21h 45m2 stops Salt Lake City Amsterdam Schiphol

$748Delta

Sat, Sep 5 - Sun, Sep 20

6:10 am - 7:43 pmOPO Porto-SFO San Francisco

21h 33m2 stops Paris Charles de Gaulle Los Angeles

6:35 am - 3:30 pmSFO San Francisco-OPO Porto

24h 55m2 stops Minneapolis St Paul Paris Charles de Gaulle

$749Air France

Sat, Sep 5 - Sun, Sep 20

12:15 pm - 8:20 amOPO Porto-LAX Los Angeles

28h 05m1 stop Casablanca Mohamed V

10:20 am - 11:15 amLAX Los Angeles-OPO Porto

16h 55m1 stop Casablanca Mohamed V

$781Royal Air Maroc

Sat, Sep 5 - Fri, Sep 18

8:20 am - 7:48 pmOPO Porto-SFO San Francisco

19h 28m2 stops Madrid Barajas Chicago O'Hare Intl

6:00 am - 7:40 amSFO San Francisco-OPO Porto

17h 40m2 stops Philadelphia Madrid Barajas

$838American Airlines

Sat, Sep 5 - Sun, Sep 20

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Scandinavian Airlines flights from Porto to California

Our best Scandinavian Airlines deals on Porto to California flight tickets

Scandinavian Airlines

Nov 12

OPO5:50 pmPorto

29h 00m

1 stop

SFO2:50 pmSan Francisco

Nov 26

SFO4:45 pmSan Francisco

16h 10m

1 stop

OPO4:55 pmPorto

$562

Scandinavian Airlines

Oct 29

OPO5:50 pmPorto

29h 00m

1 stop

SFO3:50 pmSan Francisco

Nov 5

SFO4:45 pmSan Francisco

34h 25m

1 stop

OPO11:10 amPorto

$571

Scandinavian Airlines

Nov 11

OPO11:55 amPorto

34h 55m

1 stop

SFO2:50 pmSan Francisco

Apr 29

SFO4:45 pmSan Francisco

31h 55m

1 stop

OPO8:40 amPorto

$573

American Airlines flights from Porto to California

Our best American Airlines deals on Porto to California flight tickets

American Airlines

Oct 5

OPO8:20 amPorto

35h 42m

2 stops

SFO12:02 pmSan Francisco

Oct 14

SFO12:11 amSan Francisco

31h 49m

2 stops

OPO4:00 pmPorto

$752

American Airlines

Sep 24

OPO12:25 pmPorto

19h 03m

2 stops

SFO11:28 pmSan Francisco

Sep 28

SFO8:35 amSan Francisco

23h 25m

2 stops

OPO4:00 pmPorto

$756

American Airlines

Oct 8

OPO8:20 amPorto

32h 41m

2 stops

SFO9:01 amSan Francisco

Oct 12

SFO12:42 pmSan Francisco

19h 18m

2 stops

OPO4:00 pmPorto

$757

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoSan Francisco

OPO Porto - SFO San Francisco

OPOSFO

Porto

Thu 11/12

5:50 pm-2:50 pm

1 stop29h 00m

San Francisco

Thu 11/26

4:45 pm-4:55 pm

1 stop16h 10m

$562

PortoSan Francisco

OPO Porto - SFO San Francisco

OPOSFO

Porto

Thu 10/29

5:50 pm-3:50 pm

1 stop29h 00m

San Francisco

Thu 11/5

4:45 pm-11:10 am

1 stop34h 25m

$571

PortoSan Francisco

OPO Porto - SFO San Francisco

OPOSFO

Porto

Wed 11/11

11:55 am-2:50 pm

1 stop34h 55m

San Francisco

Thu 4/29

4:45 pm-8:40 am

1 stop31h 55m

$573

PortoSan Francisco

OPO Porto - SFO San Francisco

OPOSFO

Porto

Thu 11/5

5:50 pm-2:50 pm

1 stop29h 00m

San Francisco

Mon 11/9

4:45 pm-11:05 am

1 stop34h 20m

$585

PortoSan Francisco

OPO Porto - SFO San Francisco

OPOSFO

Porto

Wed 11/4

11:55 am-2:50 pm

1 stop34h 55m

San Francisco

Mon 11/9

4:45 pm-11:05 am

1 stop34h 20m

$596

PortoSan Francisco

OPO Porto - SFO San Francisco

OPOSFO

Porto

Sat 11/14

12:00 pm-2:50 pm

1 stop34h 50m

San Francisco

Thu 4/29

4:45 pm-8:40 am

1 stop31h 55m

$613

PortoLos Angeles

OPO Porto - LAX Los Angeles

OPOLAX

Porto

Fri 2/5

5:45 pm-5:00 pm

1 stop31h 15m

Los Angeles

Wed 2/10

9:45 pm-4:55 pm

2 stops35h 10m

$652

PortoSan Francisco

OPO Porto - SFO San Francisco

OPOSFO

Porto

Fri 10/23

5:55 pm-2:40 pm

1 stop28h 45m

San Francisco

Mon 4/19

4:45 pm-11:00 am

1 stop34h 15m

$654

Quickest round-trip

PortoLos Angeles

OPO Porto - LAX Los Angeles

OPOLAX

Porto

Tue 10/13

7:00 am-2:45 pm

1 stop15h 45m

Los Angeles

Fri 10/23

4:40 pm-10:55 pm

1 stop22h 15m

$779

PortoLos Angeles

OPO Porto - LAX Los Angeles

OPOLAX

Porto

Mon 10/12

9:15 pm-2:45 pm

1 stop25h 30m

Los Angeles

Sat 10/24

4:55 pm-7:00 pm

1 stop18h 05m

$781

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Porto to 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

Prices

Airlines

What is the cheapest month to fly to California?

The month of April is another great option to travel to California, with average flight prices from Porto averaging around $754.

Can stopping save me money on Porto to California flights?

You could potentially save up to 20% on your flight if you consider stops on a Porto to California flight.

Cheap Porto to California flight deals and tips

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

Best Price Found	$367
Fastest flight time	14h 45m
Direct flights	None

The best one-way flight to California from Porto in the past 72 hours is $367. The best round-trip flight deal from Porto to California found on momondo in the last 72 hours is $562.

The fastest flight from Porto to California takes 14h 45m

There are no direct flights from Porto to California. There are no popular flight routes from Porto to California.

Search flight deals

Frequently asked questions about flying from Porto to California

When did momondo last update prices for flights from Porto Airport to California?
Prices for flights from Porto Airport to California are refreshed on a daily basis.
How many operators does momondo search for flights from Porto Airport to California?
The number of operators available for flights from Porto Airport to California is 1 as of August 2026.
How old do you have to be to fly from Porto Airport to California?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Porto Airport to California.
What documentation or ID do you need to fly to California?
The travel and health documents you'll need for your trip to California may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at California. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Porto to California

Compare and see reviews for airlines that fly from Porto to California with momondo

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $634	Free Cancellation	Rating 7.2 2,376 reviews		Search TAP AIR PORTUGAL flights

Why use momondo?

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

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 Porto to California for you.

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

Flights from Porto to California with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to California from Porto.

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

If you are not ready to book a flight from Porto to California now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to California and let you know when they change.