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Cheap flights from San Diego to Porto from $316

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 8/22. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Diego to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
3:05 pm - 3:25 pm
SAN
-
OPO
17h 20m
1 stop
Delta Logo
5:00 am - 12:10 pm
OPO
-
SAN
15h 10m
1 stop
$746Delta
Tue, Oct 27 - Tue, Nov 3
Delta Logo
3:05 pm - 3:25 pm
SAN
-
OPO
17h 20m
1 stop
Delta Logo
5:00 am - 12:10 pm
OPO
-
SAN
15h 10m
1 stop
$747Delta
Tue, Oct 27 - Tue, Nov 3
Delta Logo
6:15 am - 10:35 am
SAN
-
OPO
21h 20m
2 stops
Delta Logo
5:00 am - 5:49 pm
OPO
-
SAN
20h 49m
2 stops
$756Delta
Tue, Oct 27 - Tue, Nov 3
United Airlines Logo
6:30 am - 9:30 am
SAN
-
OPO
19h 00m
2 stops
United Airlines Logo
12:35 pm - 9:22 pm
OPO
-
SAN
16h 47m
1 stop
$760United Airlines
Sun, Nov 8 - Thu, Nov 12
Multiple Airlines Logo
5:35 pm - 11:55 pm
SAN
-
OPO
22h 20m
1 stop
Multiple Airlines Logo
6:00 am - 5:59 pm
OPO
-
SAN
19h 59m
2 stops
$761Multiple Airlines
Wed, Nov 18 - Tue, Dec 1
United Airlines Logo
6:30 am - 9:30 am
SAN
-
OPO
19h 00m
2 stops
United Airlines Logo
12:35 pm - 10:30 pm
OPO
-
SAN
17h 55m
2 stops
$765United Airlines
Sun, Nov 8 - Thu, Nov 12
Multiple Airlines Logo
11:21 am - 12:50 pm
SAN
-
OPO
17h 29m
2 stops
Multiple Airlines Logo
6:00 am - 5:59 pm
OPO
-
SAN
19h 59m
2 stops
$766Multiple Airlines
Wed, Nov 18 - Tue, Dec 1
United Airlines Logo
6:30 am - 9:30 am
SAN
-
OPO
19h 00m
2 stops
United Airlines Logo
6:00 am - 12:29 am
OPO
-
SAN
26h 29m
3 stops
$769United Airlines
Wed, Nov 18 - Tue, Dec 1
Lufthansa Logo
5:15 pm - 11:25 pm
SAN
-
OPO
22h 10m
1 stop
Lufthansa Logo
6:15 am - 8:03 pm
OPO
-
SAN
20h 48m
2 stops
$794Lufthansa
Sun, Oct 11 - Fri, Oct 30
Lufthansa Logo
5:15 pm - 11:25 pm
SAN
-
OPO
22h 10m
1 stop
Lufthansa Logo
1:45 pm - 4:45 pm
OPO
-
SAN
34h 00m
1 stop
$795Lufthansa
Sun, Oct 11 - Tue, Oct 27

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United Airlines flights from San Diego to Porto

Our best United Airlines deals on San Diego to Porto flight tickets
United Airlines
Nov 8
SAN6:30 amSan Diego
19h 00m
2 stops
OPO9:30 amPorto
Nov 12
OPO12:35 pmPorto
16h 47m
1 stop
SAN9:22 pmSan Diego
$760
United Airlines
Nov 8
SAN6:30 amSan Diego
19h 00m
2 stops
OPO9:30 amPorto
Nov 12
OPO12:35 pmPorto
17h 55m
2 stops
SAN10:30 pmSan Diego
$765
United Airlines
Nov 18
SAN6:30 amSan Diego
19h 00m
2 stops
OPO9:30 amPorto
Dec 1
OPO6:00 amPorto
26h 29m
3 stops
SAN12:29 amSan Diego
$769

Delta flights from San Diego to Porto

Our best Delta deals on San Diego to Porto flight tickets
Delta
Oct 27
SAN3:05 pmSan Diego
17h 20m
1 stop
OPO3:25 pmPorto
Nov 3
OPO5:00 amPorto
15h 10m
1 stop
SAN12:10 pmSan Diego
$746
Delta
Oct 27
SAN3:05 pmSan Diego
17h 20m
1 stop
OPO3:25 pmPorto
Nov 3
OPO5:00 amPorto
15h 10m
1 stop
SAN12:10 pmSan Diego
$747
Delta
Oct 27
SAN6:15 amSan Diego
21h 20m
2 stops
OPO10:35 amPorto
Nov 3
OPO5:00 amPorto
20h 49m
2 stops
SAN5:49 pmSan Diego
$756

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 July 16, 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
Quickest round-trip

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 10/27

3:05 pm-3:25 pm

1 stop17h 20m

Porto

Tue 11/3

5:00 am-12:10 pm

1 stop15h 10m

$746

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 10/27

3:05 pm-3:25 pm

1 stop17h 20m

Porto

Tue 11/3

5:00 am-12:10 pm

1 stop15h 10m

$747

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 10/27

6:15 am-10:35 am

2 stops21h 20m

Porto

Tue 11/3

5:00 am-5:49 pm

2 stops20h 49m

$756

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sun 11/8

6:30 am-9:30 am

2 stops19h 00m

Porto

Thu 11/12

12:35 pm-9:22 pm

1 stop16h 47m

$760

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 11/18

5:35 pm-11:55 pm

1 stop22h 20m

Porto

Tue 12/1

6:00 am-5:59 pm

2 stops19h 59m

$761

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sun 11/8

6:30 am-9:30 am

2 stops19h 00m

Porto

Thu 11/12

12:35 pm-10:30 pm

2 stops17h 55m

$765

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 11/18

11:21 am-12:50 pm

2 stops17h 29m

Porto

Tue 12/1

6:00 am-5:59 pm

2 stops19h 59m

$766

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 11/18

6:30 am-9:30 am

2 stops19h 00m

Porto

Tue 12/1

6:00 am-12:29 am

3 stops26h 29m

$769

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sun 10/11

5:15 pm-11:25 pm

1 stop22h 10m

Porto

Fri 10/30

6:15 am-8:03 pm

2 stops20h 48m

$794

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sun 10/11

5:15 pm-11:25 pm

1 stop22h 10m

Porto

Tue 10/27

1:45 pm-4:45 pm

1 stop34h 00m

$795

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $585. If you aren’t able to travel during the month of February, then book flights to Porto from San Diego during October instead. Flights to Porto in October, while not as cheap as those in February, still average around $784.

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

You could potentially save up to 28% 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 00m

Direct flights

None
The fastest flight from San Diego to Porto takes 16h 00m
There are no direct flights from San Diego to Porto. There are no popular flight routes from San Diego to Porto.
Search flight deals

Frequently asked questions about flying from San Diego to Porto

  • 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 00m.

  • 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
DeltaPriceFrom $596Free CancellationRating
7.8
8,472 reviews
Search Delta flights
LufthansaPriceFrom $708Free CancellationRating
6.8
8,139 reviews
Search Lufthansa flights
United AirlinesPriceFrom $736Free CancellationRating
7.4
9,993 reviews
Search United Airlines flights
KLMPriceFrom $797Free CancellationRating
7.8
1,539 reviews
Search KLM 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
Braga
Aveiro
Matosinhos
Lamego
Esposende
Chaves
Pinhao
Arcos de Valdevez
Guimarães
Viseu
Espinho
Ponte de Lima
Mesao Frio
Penafiel
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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