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$538+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — OPO
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 July 2, 2025.

Round-trip from

$712
(Gotogate)

One-way from

$538
(Ovago)

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 July 2, 2025.

This United Airlines deal was found by Cheapflights users on 6/29. 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.
Mon 10/278:00 amSAN - OPO
2 stops18h 30mUnited Airlines
Tue 12/96:00 amOPO - SAN
2 stops37h 18mUnited Airlines
Deal found 6/29$591
This Iberia deal was found by Cheapflights users on 6/29. 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.
Sun 10/266:15 amSAN - OPO
2 stops30h 45mIberia
Tue 12/98:20 amOPO - SAN
2 stops19h 43mIberia
Deal found 6/29$608
This Lufthansa deal was found by Cheapflights users on 6/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2911:02 amSAN - OPO
2 stops29h 43mLufthansa
Tue 12/96:00 amOPO - SAN
2 stops22h 50mLufthansa
Deal found 6/29$612
This CheapOair deal was found by Cheapflights users on 7/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:50 amSAN - OPO
2 stops18h 00mMultiple Airlines
Tue 11/116:00 amOPO - SAN
2 stops22h 54mMultiple Airlines
Deal found 7/1$614
This SWISS deal was found by Cheapflights users on 6/29. 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.
Mon 10/275:15 pmSAN - OPO
2 stops18h 20mSWISS
Mon 12/812:05 pmOPO - SAN
2 stops42h 05mSWISS
Deal found 6/29$617
This KLM deal was found by Cheapflights users on 6/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:50 amSAN - OPO
2 stops19h 00mKLM
Mon 12/811:15 amOPO - SAN
1 stop32h 50mKLM
Deal found 6/29$631
This Gotogate deal was found by Cheapflights users on 6/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/188:10 amSAN - OPO
1 stop17h 25mAir Canada
Tue 9/212:50 pmOPO - SAN
1 stop14h 45mAir Canada
Deal found 6/30$712
This Delta deal was found by Cheapflights users on 6/30. 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.
Mon 8/46:30 amSAN - OPO
2 stops25h 00mDelta
Mon 8/1811:25 amOPO - SAN
2 stops36h 29mDelta
Deal found 6/30$806

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 July 2, 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

Mon 8/18

8:10 am-9:35 am

1 stop17h 25m

Porto

Tue 9/2

12:50 pm-7:35 pm

1 stop14h 45m

$712

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 8/13

8:10 am-9:20 am

1 stop17h 10m

Porto

Wed 8/20

11:10 am-3:25 pm

1 stop36h 15m

$726

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 8/13

8:10 am-9:20 am

1 stop17h 10m

Porto

Wed 8/20

6:00 am-9:41 pm

2 stops23h 41m

$745

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Tue 9/23

5:15 pm-11:20 pm

1 stop22h 05m

Porto

Wed 10/1

6:15 am-3:25 pm

1 stop17h 10m

$768

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Mon 8/4

6:30 am-3:30 pm

2 stops25h 00m

Porto

Mon 8/18

11:25 am-3:54 pm

2 stops36h 29m

$806

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Thu 8/14

1:08 pm-3:55 pm

2 stops18h 47m

Porto

Thu 8/21

12:20 pm-12:11 am

2 stops19h 51m

$829

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Thu 8/14

2:25 pm-3:55 pm

2 stops17h 30m

Porto

Thu 8/21

12:20 pm-10:52 pm

2 stops18h 32m

$830

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Mon 9/22

9:59 am-11:00 am

2 stops41h 01m

$538

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Mon 9/22

8:10 am-9:35 am

1 stop17h 25m

$578

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Mon 9/22

1:15 pm-3:30 pm

2 stops18h 15m

$602

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 14 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 $1,033). 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 July 2, 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.

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 July 2, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and Air France 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
7,983 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

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
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

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
1,366 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

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.
Air France
7.5
Good
1,472 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

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
8,861 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

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
1,415 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

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 Air Canada is currently your cheapest option to Porto, with prices starting at $712. Additional round-trip tickets that might be worth considering are offered by United Airlines and Lufthansa, with the lowest prices starting at $745 and $768, respectively. You may be able to fly from San Diego to Porto for 32% 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 $538. However, be on the lookout for offers from United Airlines and Air France, 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 $1,033). 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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$547Average$964FlexibilityNo cancel feeOn-time76%
KLMCheapest$648Average$860FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$739Average$1,232FlexibilityNo cancel feeOn-time69%

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