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Cheap flights from San Diego to Porto from $339

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 2/22. 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
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.
Multiple Airlines Logo
9:46 am - 10:30 am
SAN
-
OPO
17h 44m2 stops
Multiple Airlines Logo
11:15 am - 1:05 pm
OPO
-
SAN
32h 50m1 stop
$483Multiple Airlines
Tue, Mar 10 - Fri, Mar 20
KLM Logo
3:00 pm - 3:25 pm
SAN
-
OPO
17h 25m1 stop
KLM Logo
11:15 am - 1:05 pm
OPO
-
SAN
32h 50m1 stop
$484KLM
Tue, Mar 10 - Fri, Mar 20
KLM Logo
1:27 pm - 3:25 pm
SAN
-
OPO
18h 58m2 stops
KLM Logo
4:10 pm - 1:05 pm
OPO
-
SAN
27h 55m1 stop
$489KLM
Tue, Mar 10 - Fri, Mar 20
Multiple Airlines Logo
9:55 am - 12:50 pm
SAN
-
OPO
18h 55m2 stops
Multiple Airlines Logo
12:50 pm - 8:49 pm
OPO
-
SAN
39h 59m2 stops
$496Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
KLM Logo
6:15 am - 10:30 am
SAN
-
OPO
20h 15m2 stops
KLM Logo
5:00 am - 8:48 pm
OPO
-
SAN
23h 48m2 stops
$499KLM
Sat, Jan 31 - Sat, Feb 7
United Airlines Logo
10:52 am - 11:40 am
SAN
-
OPO
40h 48m2 stops
United Airlines Logo
12:30 pm - 8:49 pm
OPO
-
SAN
64h 19m3 stops
$542United Airlines
Sat, Jan 31 - Sat, Feb 7
United Airlines Logo
6:15 am - 9:30 am
SAN
-
OPO
20h 15m2 stops
United Airlines Logo
12:35 pm - 11:40 pm
OPO
-
SAN
18h 05m2 stops
$599United Airlines
Tue, Mar 10 - Fri, Mar 20
Lufthansa Logo
5:35 pm - 12:50 pm
SAN
-
OPO
35h 15m1 stop
Lufthansa Logo
4:15 pm - 9:56 pm
OPO
-
SAN
37h 41m2 stops
$627Lufthansa
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
11:10 am - 12:50 pm
SAN
-
OPO
17h 40m2 stops
Multiple Airlines Logo
6:00 am - 11:53 am
OPO
-
SAN
37h 53m2 stops
$690Multiple Airlines
Thu, Jan 8 - Sat, Jan 17
Multiple Airlines Logo
10:52 am - 12:05 pm
SAN
-
OPO
17h 13m2 stops
Multiple Airlines Logo
6:00 am - 11:53 am
OPO
-
SAN
37h 53m2 stops
$691Multiple Airlines
Sun, Jan 11 - Tue, Jan 20

KLM flights from San Diego to Porto

Our best KLM deals on San Diego to Porto flight tickets
KLM
Mar 10
SAN3:00 pmSan Diego
36h 30m
1 stop
OPO10:30 amPorto
Mar 20
OPO4:10 pmPorto
27h 55m
1 stop
SAN1:05 pmSan Diego
$484
Find similar
KLM
Mar 10
SAN1:27 pmSan Diego
18h 58m
2 stops
OPO3:25 pmPorto
Mar 20
OPO4:10 pmPorto
27h 55m
1 stop
SAN1:05 pmSan Diego
$489
Find similar
KLM
Jan 31
SAN6:15 amSan Diego
20h 15m
2 stops
OPO10:30 amPorto
Feb 7
OPO5:00 amPorto
23h 48m
2 stops
SAN8:48 pmSan Diego
$499
Find similar

Lufthansa flights from San Diego to Porto

Our best Lufthansa deals on San Diego to Porto flight tickets
Lufthansa
Jan 30
SAN5:35 pmSan Diego
35h 15m
1 stop
OPO12:50 pmPorto
Feb 6
OPO4:15 pmPorto
37h 41m
2 stops
SAN9:56 pmSan Diego
$627
Find similar
Lufthansa
Jan 8
SAN11:10 amSan Diego
17h 40m
2 stops
OPO12:50 pmPorto
Jan 17
OPO1:45 pmPorto
34h 00m
1 stop
SAN3:45 pmSan Diego
$696
Find similar
Lufthansa
Jan 7
SAN5:35 pmSan Diego
20h 50m
2 stops
OPO10:25 pmPorto
Jan 17
OPO1:45 pmPorto
34h 00m
1 stop
SAN3:45 pmSan Diego
$868
Find similar

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 December 18, 2025.
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

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 3/10

9:46 am-10:30 am

2 stops17h 44m

Porto

Fri 3/20

11:15 am-1:05 pm

1 stop32h 50m

$483

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 3/10

3:00 pm-3:25 pm

1 stop17h 25m

Porto

Fri 3/20

11:15 am-1:05 pm

1 stop32h 50m

$484

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 3/10

1:27 pm-3:25 pm

2 stops18h 58m

Porto

Fri 3/20

4:10 pm-1:05 pm

1 stop27h 55m

$489

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Fri 1/30

9:55 am-12:50 pm

2 stops18h 55m

Porto

Fri 2/6

12:50 pm-8:49 pm

2 stops39h 59m

$496

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 1/31

6:15 am-10:30 am

2 stops20h 15m

Porto

Sat 2/7

5:00 am-8:48 pm

2 stops23h 48m

$499

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 1/31

10:52 am-11:40 am

2 stops40h 48m

Porto

Sat 2/7

12:30 pm-8:49 pm

3 stops64h 19m

$542

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 3/10

6:15 am-9:30 am

2 stops20h 15m

Porto

Fri 3/20

12:35 pm-11:40 pm

2 stops18h 05m

$599

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Fri 1/30

5:35 pm-12:50 pm

1 stop35h 15m

Porto

Fri 2/6

4:15 pm-9:56 pm

2 stops37h 41m

$627

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Thu 1/8

11:10 am-12:50 pm

2 stops17h 40m

Porto

Sat 1/17

6:00 am-11:53 am

2 stops37h 53m

$690

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sun 1/11

10:52 am-12:05 pm

2 stops17h 13m

Porto

Tue 1/20

6:00 am-11:53 am

2 stops37h 53m

$691

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 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 $708.

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 Tuesday when prices can be found for as low as $994. 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 Thursday because tickets tend to average around $1,291. 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 San Diego to Porto when you can find flight prices for as low as $1,004. 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 $1,147 on average. Flights to Porto from San Diego in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

17h 13m

Direct flights

None
The fastest flight from San Diego to Porto takes 17h 13m
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 17h 13m.

  • 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
United AirlinesPriceFrom $615Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
LufthansaPriceFrom $650Free CancellationRating
6.8
7,635 reviews
Search Lufthansa 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
Guimarães
Esposende
Lamego
Chaves
Viseu
Espinho
Ponte de Lima
Arcos de Valdevez
Pinhao
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.

An easier way to manage your Porto trip

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