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Cheap flights from San Diego to Porto from $439

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 9/9. 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.
Delta Logo
1:05 pm - 10:00 pm
SAN
-
OPO
24h 55m
2 stops
Delta Logo
5:00 am - 11:50 am
OPO
-
SAN
14h 50m
1 stop
$783Delta
Sat, Sep 19 - Tue, Sep 22
Delta Logo
1:05 pm - 10:00 pm
SAN
-
OPO
24h 55m
2 stops
Delta Logo
5:00 am - 7:58 pm
OPO
-
SAN
22h 58m
2 stops
$792Delta
Sat, Sep 19 - Thu, Sep 24
United Airlines Logo
9:05 pm - 6:55 am
SAN
-
OPO
25h 50m
1 stop
United Airlines Logo
11:50 am - 8:36 pm
OPO
-
SAN
16h 46m
1 stop
$800United Airlines
Sat, Sep 19 - Thu, Sep 24
United Airlines Logo
1:53 pm - 9:45 am
SAN
-
OPO
35h 52m
1 stop
United Airlines Logo
8:55 am - 7:53 pm
OPO
-
SAN
18h 58m
1 stop
$801United Airlines
Sat, Sep 19 - Wed, Sep 23
Multiple Airlines Logo
4:55 pm - 7:00 am
SAN
-
OPO
54h 05m
2 stops
Multiple Airlines Logo
6:20 am - 3:25 pm
OPO
-
SAN
17h 05m
1 stop
$810Multiple Airlines
Thu, Oct 15 - Thu, Oct 22
KLM Logo
7:00 am - 10:30 am
SAN
-
OPO
19h 30m
1 stop
KLM Logo
5:00 am - 11:50 am
OPO
-
SAN
14h 50m
1 stop
$811KLM
Thu, Oct 15 - Thu, Oct 22
United Airlines Logo
5:00 pm - 7:10 am
SAN
-
OPO
30h 10m
2 stops
United Airlines Logo
11:50 am - 7:43 pm
OPO
-
SAN
39h 53m
2 stops
$817United Airlines
Thu, Oct 15 - Thu, Oct 22
Air Canada Logo
12:30 pm - 7:10 am
SAN
-
OPO
34h 40m
2 stops
Air Canada Logo
12:45 pm - 5:00 pm
OPO
-
SAN
36h 15m
2 stops
$838Air Canada
Thu, Sep 17 - Wed, Sep 23
United Airlines Logo
9:45 pm - 9:45 am
SAN
-
OPO
28h 00m
2 stops
United Airlines Logo
11:20 am - 7:55 pm
OPO
-
SAN
40h 35m
2 stops
$840United Airlines
Sat, Oct 3 - Sat, Oct 17
United Airlines Logo
10:20 pm - 9:45 am
SAN
-
OPO
27h 25m
1 stop
United Airlines Logo
11:20 am - 7:55 pm
OPO
-
SAN
40h 35m
2 stops
$841United Airlines
Sat, Oct 3 - Sat, Oct 17

Delta flights from San Diego to Porto

Our best Delta deals on San Diego to Porto flight tickets
Delta
Sep 27
SAN7:00 amSan Diego
19h 25m
1 stop
OPO10:25 amPorto
Oct 14
OPO11:45 amPorto
32h 05m
1 stop
SAN11:50 amSan Diego
$778
Delta
Sep 27
SAN6:15 amSan Diego
25h 15m
2 stops
OPO3:30 pmPorto
Oct 14
OPO11:45 amPorto
32h 05m
1 stop
SAN11:50 amSan Diego
$782
Delta
Sep 27
SAN7:00 amSan Diego
19h 25m
1 stop
OPO10:25 amPorto
Oct 13
OPO6:15 amPorto
22h 34m
2 stops
SAN8:49 pmSan Diego
$795

United Airlines flights from San Diego to Porto

Our best United Airlines deals on San Diego to Porto flight tickets
United Airlines
Sep 26
SAN10:40 pmSan Diego
27h 05m
2 stops
OPO9:45 amPorto
Oct 13
OPO12:15 pmPorto
37h 11m
2 stops
SAN5:26 pmSan Diego
$779
United Airlines
Sep 26
SAN1:30 pmSan Diego
36h 15m
1 stop
OPO9:45 amPorto
Oct 13
OPO12:15 pmPorto
37h 11m
2 stops
SAN5:26 pmSan Diego
$780
United Airlines
Oct 15
SAN5:00 pmSan Diego
30h 10m
2 stops
OPO7:10 amPorto
Oct 22
OPO11:50 amPorto
39h 53m
2 stops
SAN7:43 pmSan Diego
$817

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 May 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

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 9/19

1:05 pm-10:00 pm

2 stops24h 55m

Porto

Tue 9/22

5:00 am-11:50 am

1 stop14h 50m

$783

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 9/19

1:05 pm-10:00 pm

2 stops24h 55m

Porto

Thu 9/24

5:00 am-7:58 pm

2 stops22h 58m

$792

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 9/19

9:05 pm-6:55 am

1 stop25h 50m

Porto

Thu 9/24

11:50 am-8:36 pm

1 stop16h 46m

$800

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 9/19

1:53 pm-9:45 am

1 stop35h 52m

Porto

Wed 9/23

8:55 am-7:53 pm

1 stop18h 58m

$801

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Thu 10/15

4:55 pm-7:00 am

2 stops54h 05m

Porto

Thu 10/22

6:20 am-3:25 pm

1 stop17h 05m

$810
Quickest round-trip

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Thu 10/15

7:00 am-10:30 am

1 stop19h 30m

Porto

Thu 10/22

5:00 am-11:50 am

1 stop14h 50m

$811

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Thu 10/15

5:00 pm-7:10 am

2 stops30h 10m

Porto

Thu 10/22

11:50 am-7:43 pm

2 stops39h 53m

$817

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Thu 9/17

12:30 pm-7:10 am

2 stops34h 40m

Porto

Wed 9/23

12:45 pm-5:00 pm

2 stops36h 15m

$838

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 10/3

9:45 pm-9:45 am

2 stops28h 00m

Porto

Sat 10/17

11:20 am-7:55 pm

2 stops40h 35m

$840

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 10/3

10:20 pm-9:45 am

1 stop27h 25m

Porto

Sat 10/17

11:20 am-7:55 pm

2 stops40h 35m

$841

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 10% 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 $489Free CancellationRating
7.9
8,457 reviews
Search Delta flights
KLMPriceFrom $585Free CancellationRating
7.8
1,517 reviews
Search KLM flights
United AirlinesPriceFrom $615Free CancellationRating
7.4
9,730 reviews
Search United Airlines flights
LufthansaPriceFrom $708Free CancellationRating
6.8
8,004 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
Lamego
Esposende
Chaves
Pinhao
Espinho
Guimarães
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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