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Cheap flights from San Diego to Porto from $343

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Diego to Porto departing on 8/19. 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
0 bags

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Find the cheapest flights from San Diego to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
12:35 pm - 7:00 am
SAN
-
OPO
34h 25m
2 stops
Air Canada Logo
6:00 am - 10:53 am
OPO
-
SAN
36h 53m
2 stops
$715Air Canada
Tue, Aug 18 - Tue, Jan 12
Multiple Airlines Logo
4:55 pm - 7:00 am
SAN
-
OPO
30h 05m
2 stops
Multiple Airlines Logo
1:45 pm - 3:45 pm
OPO
-
SAN
34h 00m
1 stop
$719Multiple Airlines
Tue, Aug 18 - Tue, Jan 12
Multiple Airlines Logo
10:40 pm - 7:00 am
SAN
-
OPO
24h 20m
2 stops
Multiple Airlines Logo
7:20 pm - 9:57 pm
OPO
-
SAN
34h 37m
2 stops
$725Multiple Airlines
Tue, Aug 18 - Tue, Feb 16
KLM Logo
7:00 am - 10:30 am
SAN
-
OPO
19h 30m
1 stop
KLM Logo
5:00 am - 12:05 pm
OPO
-
SAN
15h 05m
1 stop
$740KLM
Tue, Aug 18 - Tue, Jan 12
Lufthansa Logo
5:15 pm - 11:25 pm
SAN
-
OPO
22h 10m
1 stop
Lufthansa Logo
6:20 am - 3:25 pm
OPO
-
SAN
17h 05m
1 stop
$754Lufthansa
Tue, Apr 21 - Tue, Apr 28
Delta Logo
9:47 am - 3:25 pm
SAN
-
OPO
21h 38m
2 stops
Delta Logo
5:00 am - 11:50 am
OPO
-
SAN
14h 50m
1 stop
$757Delta
Tue, Apr 21 - Tue, Apr 28
Delta Logo
9:47 am - 3:25 pm
SAN
-
OPO
21h 38m
2 stops
Delta Logo
5:00 am - 6:05 pm
OPO
-
SAN
21h 05m
2 stops
$767Delta
Tue, Apr 21 - Tue, Apr 28
Lufthansa Logo
5:15 pm - 11:25 pm
SAN
-
OPO
22h 10m
1 stop
Lufthansa Logo
6:20 am - 3:25 pm
OPO
-
SAN
17h 05m
1 stop
$777Lufthansa
Tue, Apr 21 - Tue, Apr 28
Multiple Airlines Logo
5:15 pm - 11:25 pm
SAN
-
OPO
22h 10m
1 stop
Multiple Airlines Logo
12:15 pm - 10:59 pm
OPO
-
SAN
42h 44m
2 stops
$788Multiple Airlines
Tue, Apr 21 - Tue, Apr 28
United Airlines Logo
6:20 am - 11:10 am
SAN
-
OPO
20h 50m
2 stops
United Airlines Logo
6:00 am - 8:39 pm
OPO
-
SAN
46h 39m
3 stops
$792United Airlines
Tue, Apr 21 - Tue, Apr 28

British Airways flights from San Diego to Porto

Our best British Airways deals on San Diego to Porto flight tickets
British Airways
Apr 26
SAN7:20 pmSan Diego
40h 45m
2 stops
OPO8:05 pmPorto
May 11
OPO12:25 pmPorto
40h 18m
2 stops
SAN8:43 pmSan Diego
$825
British Airways
Apr 26
SAN4:45 pmSan Diego
19h 50m
1 stop
OPO8:35 pmPorto
May 11
OPO9:25 pmPorto
25h 30m
1 stop
SAN2:55 pmSan Diego
$829
British Airways
Sep 14
SAN4:45 pmSan Diego
19h 20m
1 stop
OPO8:05 pmPorto
Sep 30
OPO8:20 pmPorto
26h 35m
1 stop
SAN2:55 pmSan Diego
$859

KLM flights from San Diego to Porto

Our best KLM deals on San Diego to Porto flight tickets
KLM
Aug 18
SAN7:00 amSan Diego
19h 30m
1 stop
OPO10:30 amPorto
Jan 12
OPO5:00 amPorto
15h 05m
1 stop
SAN12:05 pmSan Diego
$740
KLM
Aug 18
SAN7:00 amSan Diego
19h 30m
1 stop
OPO10:30 amPorto
Jan 12
OPO5:00 amPorto
15h 05m
1 stop
SAN12:05 pmSan Diego
$790
KLM
May 7
SAN1:40 pmSan Diego
20h 35m
1 stop
OPO6:15 pmPorto
May 14
OPO5:55 amPorto
20h 08m
2 stops
SAN6:03 pmSan Diego
$811

momondo Fare Finder

 
Customize your flight search to find flights from San Diego 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 March 27, 2026.
Use the filters below to find and compare flights from San Diego to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 8/18

12:35 pm-7:00 am

2 stops34h 25m

Porto

Tue 1/12

6:00 am-10:53 am

2 stops36h 53m

$715

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 8/18

4:55 pm-7:00 am

2 stops30h 05m

Porto

Tue 1/12

1:45 pm-3:45 pm

1 stop34h 00m

$719

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 8/18

10:40 pm-7:00 am

2 stops24h 20m

Porto

Tue 2/16

7:20 pm-9:57 pm

2 stops34h 37m

$725
Quickest round-trip

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 8/18

7:00 am-10:30 am

1 stop19h 30m

Porto

Tue 1/12

5:00 am-12:05 pm

1 stop15h 05m

$740

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 4/21

5:15 pm-11:25 pm

1 stop22h 10m

Porto

Tue 4/28

6:20 am-3:25 pm

1 stop17h 05m

$754

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 4/21

9:47 am-3:25 pm

2 stops21h 38m

Porto

Tue 4/28

5:00 am-11:50 am

1 stop14h 50m

$757

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 4/21

9:47 am-3:25 pm

2 stops21h 38m

Porto

Tue 4/28

5:00 am-6:05 pm

2 stops21h 05m

$767

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 4/21

5:15 pm-11:25 pm

1 stop22h 10m

Porto

Tue 4/28

6:20 am-3:25 pm

1 stop17h 05m

$777

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 4/21

5:15 pm-11:25 pm

1 stop22h 10m

Porto

Tue 4/28

12:15 pm-10:59 pm

2 stops42h 44m

$788

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 4/21

6:20 am-11:10 am

2 stops20h 50m

Porto

Tue 4/28

6:00 am-8:39 pm

3 stops46h 39m

$792

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 Porto from

How to get the cheapest flight ticket from San Diego 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 typical price of a round-trip flight between San Diego and Porto?

What is the cheapest month to fly to Porto?

The month of February is, on average, the cheapest month to fly to Porto from San Diego, with most prices found around $648. If you aren’t able to travel during the month of February, then book flights to Porto from San Diego during December instead. Flights to Porto in December, while not as cheap as those in February, still average around $722.

Can stopping save me money on San Diego to Porto flights?

You could potentially save up to 22% on your flight if you consider stops on a San Diego to Porto flight.

When to book flights from San Diego to Porto

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

Cheap San Diego to Porto (SAN to OPO) flight deals and tips

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

Fastest flight time

16h 20m

Direct flights

None
The fastest flight from San Diego to Porto takes 16h 20m
There are no direct flights from San Diego to Porto. There are no popular flight routes from San Diego to Porto.
Search flight deals

  • How far is San Diego to Porto by plane?

    Porto is 5600.8 mi away from San Diego. By plane, this route typically takes 16h 20m.

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

    Prices for flights from San Diego Airport to Porto Airport refresh daily.

  • How many operators does momondo search for flights from San Diego Airport to Porto Airport?

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Diego Airport to Porto Airport.

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

    The required travel and health documents for your Porto Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Porto Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from San Diego to Porto?

Best airlines flying from San Diego to Porto

Compare and see reviews for airlines that fly from San Diego to Porto with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $585Free CancellationRating
7.8
1,477 reviews
Search KLM flights
LufthansaPriceFrom $611Free CancellationRating
6.8
7,871 reviews
Search Lufthansa flights
United AirlinesPriceFrom $615Free CancellationRating
7.4
9,500 reviews
Search United Airlines flights

Traveling to a place near Porto?

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

Why use momondo?

Why should I use momondo to find a flight deal from San Diego 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 San Diego to Porto for you.

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

momondo does allow users to show only those flights to Porto from San Diego which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Diego to Porto?

Once you have performed a search for San Diego to Porto 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 San Diego to Porto right now. Can momondo alert me if prices change?

Yes. momondo can track prices for San Diego 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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