$367+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — OPO
Sep 26 — Oct 31
Round-trip
1 adult, Economy
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Find cheap flights from San Diego to Porto with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from San Diego to Porto
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Diego to PortoExplore 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 August 27, 2026.
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 August 27, 2026.
This United deal was found by Cheapflights users on 8/23. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/86:20 am -
3 stops19h 10m
Fri 12/116:15 am -
1 stop17h 30m
Deal found 8/23![Multiple Airlines logo]()
$748
This United Airlines deal was found by Cheapflights users on 8/23. 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.
Tue 12/86:20 am -
3 stops19h 10m
Fri 12/116:00 am -
3 stops22h 45m
Deal found 8/23![United Airlines logo]()
$756
This Gotogate deal was found by Cheapflights users on 8/24. 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.
Sun 10/184:50 pm -
2 stops30h 00m
Tue 11/31:45 pm -
1 stop34h 00m
Deal found 8/24![Multiple Airlines logo]()
$779
This KLM deal was found by Cheapflights users on 8/24. 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 10/187:20 am -
1 stop19h 05m
Tue 11/35:00 am -
1 stop15h 10m
Deal found 8/24![KLM logo]()
$799
This Delta deal was found by Cheapflights users on 8/24. 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.
Sun 10/187:20 am -
1 stop19h 05m
Mon 11/211:15 am -
1 stop32h 55m
Deal found 8/24![Delta logo]()
$801
This Delta deal was found by Cheapflights users on 8/27. 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.
Tue 10/272:10 pm -
2 stops24h 50m
Tue 11/35:00 am -
1 stop15h 10m
Deal found 8/27![Delta logo]()
$808
This Gotogate deal was found by Cheapflights users on 8/24. 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.
Tue 10/137:00 am -
1 stop16h 00m
Tue 10/2011:05 am -
1 stop36h 20m
Deal found 8/24![Multiple Airlines logo]()
$811
This Delta deal was found by Cheapflights users on 8/24. 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.
Tue 10/136:15 am -
2 stops20h 15m
Mon 10/1911:25 am -
1 stop32h 25m
Deal found 8/24![Delta logo]()
$816
This United Airlines deal was found by Cheapflights users on 8/24. 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.
Tue 10/1310:20 pm -
2 stops24h 40m
Tue 10/2011:15 am -
2 stops41h 14m
Deal found 8/24![United Airlines logo]()
$821
This Delta deal was found by Cheapflights users on 8/24. 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.
Tue 10/136:15 am -
2 stops20h 15m
Wed 10/2111:45 am -
2 stops20h 10m
Deal found 8/24![Delta logo]()
$822
Best flights from San Diego to PortoDiscover carefully curated flight deals from San Diego to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 27, 2026.
Discover carefully curated flight deals from San Diego to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 27, 2026.
This Delta deal was found by Cheapflights users on 8/27. 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.
Sat 1/2310:10 pm -
2 stops28h 25m
Tue 2/235:00 am -
1 stop15h 10m
Deal found 8/27![Delta logo]()
$753
This United Airlines deal was found by Cheapflights users on 8/25. 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.
Tue 12/86:20 am -
3 stops19h 10m
Fri 12/1112:35 pm -
2 stops17h 53m
Deal found 8/25![United Airlines logo]()
$765
This Delta deal was found by Cheapflights users on 8/23. 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.
Tue 10/278:00 am -
2 stops19h 35m
Tue 11/35:00 am -
1 stop15h 10m
Deal found 8/23![Delta logo]()
$808
This United Airlines deal was found by Cheapflights users on 8/25. 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.
Tue 10/66:15 am -
2 stops16h 45m
Wed 10/1411:20 am -
2 stops37h 45m
Deal found 8/25![United Airlines logo]()
$838
This Delta deal was found by Cheapflights users on 8/24. 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.
Tue 10/136:15 am -
2 stops20h 15m
Wed 10/2111:45 am -
1 stop32h 05m
Deal found 8/24![Delta logo]()
$816
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/283:56 pm -
3 stops31h 04m
Wed 10/76:00 am -
2 stops22h 08m
Deal found 8/27![United Airlines logo]()
$850
Last-minute flights from San Diego to PortoDiscover last-minute flight deals from San Diego to Porto. Data last updated August 27, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Porto. Data last updated August 27, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/23. 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.
Sun 9/2011:54 am -
2 stops19h 36m
Fri 10/29:25 am -
2 stops21h 08m
Deal found 8/23![Delta logo]()
$859
This United Airlines deal was found by Cheapflights users on 8/23. 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.
Tue 9/226:35 am -
1 stop15h 40m
Tue 9/2912:15 pm -
2 stops35h 34m
Deal found 8/23![United Airlines logo]()
$835
This Expedia deal was found by Cheapflights users on 8/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:41 pm -
2 stops51h 19m
Tue 10/66:20 am -
1 stop17h 05m
Deal found 8/25![Multiple Airlines logo]()
$852
This FlightHub deal was found by Cheapflights users on 8/23. 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.
Sun 9/275:15 pm -
1 stop22h 10m
Wed 10/78:40 am -
2 stops20h 05m
Deal found 8/23![Multiple Airlines logo]()
$843
This oojo deal was found by Cheapflights users on 8/23. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/275:15 pm -
1 stop22h 10m
Wed 10/711:05 am -
1 stop36h 20m
Deal found 8/23![Lufthansa logo]()
$848
This United Airlines deal was found by Cheapflights users on 8/24. 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.
Sun 9/279:20 pm -
2 stops25h 40m
Wed 10/76:00 am -
2 stops22h 08m
Deal found 8/24![United Airlines logo]()
$850
This Gotogate deal was found by Cheapflights users on 8/23. 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 9/287:00 am -
1 stop16h 00m
Wed 10/711:05 am -
1 stop36h 20m
Deal found 8/23![Multiple Airlines logo]()
$826
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/287:00 am -
1 stop16h 00m
Wed 10/711:20 am -
2 stops43h 07m
Deal found 8/23![United Airlines logo]()
$833
One-way flights from San Diego to PortoSearch for one-way flight options from San Diego to Porto. Find affordable one-way fares based on user searches. Data last updated August 27, 2026.
Search for one-way flight options from San Diego to Porto. Find affordable one-way fares based on user searches. Data last updated August 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:12 am -
2 stops31h 43m
Deal found 8/24![Multiple Airlines logo]()
$367
This Kiwi.com deal was found by Cheapflights users on 8/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/271:30 pm -
3 stops34h 15m
Deal found 8/26![Multiple Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Fri 11/2710:30 pm -
2 stops51h 00m
Deal found 8/26![United Airlines logo]()
$374
This Expedia deal was found by Cheapflights users on 8/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/275:35 pm -
1 stop22h 05m
Deal found 8/26![Lufthansa logo]()
$392
This Expedia deal was found by Cheapflights users on 8/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/276:00 pm -
2 stops18h 00m
Deal found 8/25![Iberia logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 8/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/119:27 pm -
3 stops40h 28m
Deal found 8/24![Multiple Airlines logo]()
$420
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:15 am -
3 stops48h 25m
Deal found 8/22![Multiple Airlines logo]()
$433
Find 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 August 27, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $748 (United) |
One-way from | $367 (Kiwi.com) |
Popular in | May |
Cheapest in | February |
Average price | $1,093 |
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 7,457,451 searches. Data last updated August 27, 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
Cheapest round-trip
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Sat 1/23
10:10 pm-10:35 am
2 stops28h 25m
Porto
Tue 2/23
5:00 am-12:10 pm
1 stop15h 10m
$753
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Tue 12/8
6:20 am-9:30 am
3 stops19h 10m
Porto
Fri 12/11
12:35 pm-10:28 pm
2 stops17h 53m
$765
Quickest round-trip
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Tue 10/27
8:00 am-10:35 am
2 stops19h 35m
Porto
Tue 11/3
5:00 am-12:10 pm
1 stop15h 10m
$808
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Tue 10/13
6:15 am-10:30 am
2 stops20h 15m
Porto
Wed 10/21
11:45 am-11:50 am
1 stop32h 05m
$816
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Tue 10/6
6:15 am-7:00 am
2 stops16h 45m
Porto
Wed 10/14
11:20 am-5:05 pm
2 stops37h 45m
$838
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Mon 9/28
3:56 pm-7:00 am
3 stops31h 04m
Porto
Wed 10/7
6:00 am-8:08 pm
2 stops22h 08m
$850
Cheapest one-way
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Fri 11/27
10:30 pm-9:30 am
2 stops51h 00m
$374
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Sun 9/6
8:12 am-11:45 am
2 stops43h 33m
$377
Quickest one-way
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Fri 11/27
6:00 pm-8:00 pm
2 stops18h 00m
$396
San DiegoPorto
SAN San Diego - OPO Porto
SANOPO
San Diego
Sun 10/11
9:27 pm-9:55 pm
3 stops40h 28m
$420
Showing 1-10 of 15 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Diego-Porto flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on San Diego-Porto flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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.
SAN-OPO
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, February is the cheapest month in which you can book a flight from San Diego to Porto (average of $585). Flying from San Diego to Porto in May is currently the most expensive (average of $1,342). 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.
How much does it cost to fly round-trip from San Diego to Porto?
Airfare is below average for this route at the moment.
San Diego to Porto flights typically cost between $842 and $1,347 in December.The cheapest round-trip price found within the last 5 days was $748 on Multiple Airlines (Dec 8-Dec 11).
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 August 27, 2026.
Peruse reviews from past customers who have flown with KLM,Delta, andUnited Airlines 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.
Food
7.3
Comfort
7.7
Overall
7.8
Boarding
7.8
Crew
8.4
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Food
7.3
Comfort
7.7
Overall
7.8
Boarding
7.8
Crew
8.4
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Food
7.3
Comfort
7.7
Overall
7.8
Boarding
7.8
Crew
8.4
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Food
7.3
Comfort
7.7
Overall
7.8
Boarding
7.8
Crew
8.4
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Food
7.3
Comfort
7.7
Overall
7.8
Boarding
7.8
Crew
8.4
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
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.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
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San Diego and Porto flights
Browse other San Diego and Porto flight options. Last updated on August 27, 2026.
Other flights from San Diego
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Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 27, 2026.
Top 4 airlines flying from San Diego to Porto
Discover the top 4 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 7,457,451 searches. Data last updated August 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$596 | Average$963 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$632 | Average$1,061 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$708 | Average$1,311 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$797 | Average$1,130 | FlexibilityNo cancel fee | On-time69% |