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$444+ 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — OPO
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This Lufthansa deal was found by Cheapflights users on 10/29. 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 12/35:35 pmSAN - OPO
1 stop22h 05mLufthansa
Sun 12/76:15 amOPO - SAN
1 stop17h 30mLufthansa
Deal found 10/29$477
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:10 amSAN - OPO
2 stops19h 20mDelta
Sun 12/75:00 amOPO - SAN
2 stops25h 54mDelta
Deal found 10/29$492
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:05 pmSAN - OPO
2 stops21h 30mSWISS
Sun 12/712:05 pmOPO - SAN
2 stops40h 43mSWISS
Deal found 10/28$525
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:35 pmSAN - OPO
1 stop22h 05mLufthansa
Wed 12/106:00 amOPO - SAN
2 stops24h 30mLufthansa
Deal found 10/28$531
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Wed 12/312:08 pmSAN - OPO
3 stops39h 32mUnited Airlines
Sun 12/712:30 pmOPO - SAN
2 stops43h 12mUnited Airlines
Deal found 10/29$533

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$477
(Lufthansa)

One-way from

$444
(Thrive Travel)

Popular in

December

Cheapest in

February

Average price

$784
Provider with most accurate pricing for San Diego-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Diego-Porto flights.
Search Deals
From San Diego to Porto
Search Deals
One-way flight from San Diego to Porto
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($93 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 30, 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

Wed 12/3

5:35 pm-11:40 pm

1 stop22h 05m

Porto

Sun 12/7

6:15 am-3:45 pm

1 stop17h 30m

$477

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 12/3

7:10 am-10:30 am

2 stops19h 20m

Porto

Sun 12/7

5:00 am-10:54 pm

2 stops25h 54m

$492

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 12/3

1:05 pm-6:35 pm

2 stops21h 30m

Porto

Sun 12/7

12:05 pm-8:48 pm

2 stops40h 43m

$525

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 12/3

12:08 pm-11:40 am

3 stops39h 32m

Porto

Sun 12/7

12:30 pm-11:42 pm

2 stops43h 12m

$533

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 12/3

8:45 am-3:25 pm

2 stops22h 40m

Porto

Wed 12/10

6:00 am-8:48 pm

3 stops22h 48m

$627

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Fri 11/7

5:35 pm-11:40 pm

1 stop22h 05m

Porto

Thu 11/13

6:00 am-10:20 pm

2 stops24h 20m

$785

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Fri 12/12

9:55 pm-3:05 pm

2 stops33h 10m

Porto

Fri 12/19

12:30 pm-11:37 pm

2 stops43h 07m

$1,086

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 2/11

5:35 pm-11:40 pm

1 stop22h 05m

$444

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Sat 4/25

9:59 pm-7:20 am

2 stops49h 21m

$451

San DiegoPorto

SAN - OPO

SANOPO

San Diego

Wed 2/11

6:15 am-3:25 pm

3 stops25h 10m

$463

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 13 results
1
2

Compare providers for flights from San Diego to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Diego to Porto in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Diego-Porto flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Diego-Porto flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Diego-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Diego-Porto flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, October is the cheapest month in which you can book a flight from San Diego to Porto (average of $604). Flying from San Diego to Porto in June is currently the most expensive (average of $1,225). 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 October 30, 2025.

It’s optimal to fly from San Diego to Porto in the afternoon. By choosing this option you can save up to 32% on the cost of your flight, compared to a flight in the evening.

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 October 30, 2025.
Peruse reviews from past customers who have flown with United Airlines and Lufthansa 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.
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,541 reviews
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • How long is the flight from San Diego to Porto?

    For as low as $492, Lufthansa can have you in Porto from San Diego in 19h 20m. The distance between San Diego and Porto is about 5596 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $615. Another option worth looking into is Lufthansa, starting at $650 round trip. You may be able to fly from San Diego to Porto for 42% 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 Lufthansa, with whom users have recently found tickets for as low as $444. However, be on the lookout for offers from United Airlines and TAP AIR PORTUGAL, 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, October is the cheapest month in which you can book a flight from San Diego to Porto (average of $604). Flying from San Diego to Porto in June is currently the most expensive (average of $1,225). 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 Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra

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Top 2 airlines flying from San Diego to Porto

Discover the top 2 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$615Average$1,235FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$650Average$976FlexibilityNo cancel feeOn-time76%

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