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$371+ Cheap flights from San Diego (SAN) to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — OPO
jul. 16 — jul. 231
mié. 7/16
mié. 7/23
1 adult, Economy
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Cheap flight deals from San Diego to Porto

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated julio 11, 2025.

Round-trip from

$597
(United Airlines)

One-way from

$371
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$1,199
From San Diego to Porto
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One-way flight from San Diego to Porto
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Highest demand for flights based on searches. 24% potential increase in price ($338 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($60 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from San Diego to Porto

Cheapest flights from San Diego to Porto
Explore the most affordable flight options available from San Diego to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 11, 2025.

This United Airlines deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/289:05 amSAN - OPO
2 stops17h 25mUnited Airlines
mar. 11/1112:35 pmOPO - SAN
2 stops28h 39mUnited Airlines
Deal found 7/10$597
This Iberia deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/287:15 amSAN - OPO
2 stops21h 30mIberia
mar. 11/118:40 pmOPO - SAN
2 stops31h 27mIberia
Deal found 7/9$619
This FlightHub deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/2810:23 amSAN - OPO
2 stops21h 22mLufthansa
mar. 11/111:45 pmOPO - SAN
1 stop34h 00mLufthansa
Deal found 7/9$626
This SWISS deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/34:04 pmSAN - OPO
2 stops18h 31mSWISS
dom. 12/712:05 pmOPO - SAN
2 stops40h 11mSWISS
Deal found 7/9$667
This Justfly.com deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/265:35 pmSAN - OPO
1 stop22h 10mMultiple Airlines
mar. 1/612:40 pmOPO - SAN
2 stops37h 57mMultiple Airlines
Deal found 7/10$767
This Orbitz deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/114:40 pmSAN - OPO
2 stops41h 35mAir Canada
mar. 10/216:15 amOPO - SAN
2 stops37h 16mAir Canada
Deal found 7/8$773
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/59:59 amSAN - OPO
2 stops21h 31mDelta
mié. 8/2011:25 amOPO - SAN
1 stop32h 35mDelta
Deal found 7/8$796
This Air France deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/71:45 pmSAN - OPO
2 stops17h 50mKLM
lun. 8/186:25 pmOPO - SAN
1 stop25h 35mKLM
Deal found 7/8$887

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated julio 11, 2025.
Use the filters below to find and compare flights from San Diego to Porto that are best for you.

Fly from

San Diego

Fly to

Porto

Route

Depart

Return

Price

San DiegoPorto

SAN - OPO

SANOPO

San Diego

mar. 10/28

9:05 am-9:30 am

2 stops17h 25m

Porto

mar. 11/11

12:35 pm-9:14 am

2 stops28h 39m

$597

San DiegoPorto

SAN - OPO

SANOPO

San Diego

mar. 10/28

7:15 am-11:45 am

2 stops21h 30m

Porto

mar. 11/11

8:40 pm-8:07 pm

2 stops31h 27m

$619

San DiegoPorto

SAN - OPO

SANOPO

San Diego

mar. 10/28

10:23 am-2:45 pm

2 stops21h 22m

Porto

mar. 11/11

1:45 pm-3:45 pm

1 stop34h 00m

$626

San DiegoPorto

SAN - OPO

SANOPO

San Diego

vie. 12/26

5:35 pm-11:45 pm

1 stop22h 10m

Porto

mar. 1/6

12:40 pm-6:37 pm

2 stops37h 57m

$767

San DiegoPorto

SAN - OPO

SANOPO

San Diego

sáb. 10/11

4:40 pm-6:15 pm

2 stops41h 35m

Porto

mar. 10/21

6:15 am-11:31 am

2 stops37h 16m

$773

San DiegoPorto

SAN - OPO

SANOPO

San Diego

mar. 8/5

9:59 am-3:30 pm

2 stops21h 31m

Porto

mié. 8/20

11:25 am-12:00 pm

1 stop32h 35m

$796

San DiegoPorto

SAN - OPO

SANOPO

San Diego

jue. 8/7

1:45 pm-3:35 pm

2 stops17h 50m

Porto

lun. 8/18

6:25 pm-12:00 pm

1 stop25h 35m

$887

San DiegoPorto

SAN - OPO

SANOPO

San Diego

mar. 8/26

6:15 am-9:50 pm

3 stops31h 35m

$371

San DiegoPorto

SAN - OPO

SANOPO

San Diego

lun. 9/22

7:00 am-11:00 am

2 stops44h 00m

$560

San DiegoPorto

SAN - OPO

SANOPO

San Diego

lun. 9/22

8:10 am-9:35 am

1 stop17h 25m

$578

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

Showing 1-10 of 11 results
1
2

Best time to book a flight from San Diego to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from San Diego with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Diego to Porto

What is the cheapest month to book a flight from San Diego to Porto?

Currently, January is the cheapest month in which you can book a flight from San Diego to Porto (average of $523). Flying from San Diego to Porto in June is currently the most expensive (average of $1,032). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SAN to OPO?

Find hourly flight availability from San Diego to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 11, 2025.

It’s optimal to fly from San Diego to Porto in the afternoon. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight in the morning.

How much does it cost to fly round-trip from San Diego to Porto?

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated julio 11, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and SWISS from San Diego to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,951 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,372 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,655 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,846 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Scandinavian Airlines
7.3
Good
1,419 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from San Diego to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from San Diego to Porto round-trip?

    Flying on United Airlines is currently your cheapest option to Porto, with prices starting at $597. Additional round-trip tickets that might be worth considering are offered by Iberia and Lufthansa, with the lowest prices starting at $619 and $626, respectively. You may be able to fly from San Diego to Porto for 43% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from San Diego to Porto one-way?

    The cheapest airline one-way is Scandinavian Airlines, with whom users have recently found tickets for as low as $560. However, be on the lookout for offers from United Airlines and Air Canada, as they are both options that can get you from San Diego to Porto for a low price.

  • Can I find deals for flights from San Diego to Porto that include hotel bookings?

    Yes. In addition to deals on San Diego to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Diego to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to Porto.

  • Can I find deals for business class flights from San Diego to Porto?

    Yes. Cheapflights offers flight deals from San Diego to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Diego to Porto?

    Currently, January is the cheapest month in which you can book a flight from San Diego to Porto (average of $523). Flying from San Diego to Porto in June is currently the most expensive (average of $1,032). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos

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Top 3 airlines flying from San Diego to Porto

Discover the top 3 airlines that operate flights from San Diego to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated julio 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$547Average$976FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$615Average$1,232FlexibilityNo cancel feeOn-time69%
KLMCheapest$648Average$860FlexibilityNo cancel feeOn-time75%

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