$348+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — OPO
Jul 27 — Aug 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
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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 June 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 June 27, 2026.
This KLM deal was found by Cheapflights users on 6/22. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/273:05 pm
SAN
- OPO
1 stop17h 20m
KLM
Tue 11/35:00 am
OPO
- SAN
1 stop15h 10m
KLM
Deal found 6/22![KLM logo]()
$737
This oojo deal was found by Cheapflights users on 6/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/311:21 am
SAN
- OPO
2 stops17h 29m
Multiple Airlines
Thu 11/127:20 pm
OPO
- SAN
2 stops35h 08m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$741
This Air France deal was found by Cheapflights users on 6/24. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/191:05 pm
SAN
- OPO
1 stop13h 25m
Multiple Airlines
Mon 11/164:10 pm
OPO
- SAN
1 stop28h 00m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$743
This Delta deal was found by Cheapflights users on 6/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:00 am
SAN
- OPO
2 stops19h 35m
Delta
Tue 11/35:00 am
OPO
- SAN
1 stop15h 10m
Delta
Deal found 6/25![Delta logo]()
$746
This oojo deal was found by Cheapflights users on 6/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:05 am
SAN
- OPO
2 stops21h 40m
Multiple Airlines
Tue 11/37:20 pm
OPO
- SAN
2 stops33h 17m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$755
This Ticket deal was found by Cheapflights users on 6/22. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/107:00 am
SAN
- OPO
1 stop16h 00m
Air Canada
Tue 8/2512:15 pm
OPO
- SAN
1 stop16h 24m
Air Canada
Deal found 6/22![Air Canada logo]()
$769
This Gotogate deal was found by Cheapflights users on 6/25. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/107:00 am
SAN
- OPO
1 stop16h 00m
Multiple Airlines
Tue 8/256:20 am
OPO
- SAN
1 stop17h 05m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$801
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 June 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 June 27, 2026.
This KLM deal was found by Cheapflights users on 6/22. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/273:05 pm
SAN
- OPO
1 stop17h 20m
KLM
Tue 11/35:00 am
OPO
- SAN
1 stop15h 10m
KLM
Deal found 6/22![KLM logo]()
$737
This Delta deal was found by Cheapflights users on 6/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/32:05 pm
SAN
- OPO
1 stop24h 25m
Delta
Thu 11/125:00 am
OPO
- SAN
1 stop15h 10m
Delta
Deal found 6/26![Delta logo]()
$746
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:50 am
SAN
- OPO
2 stops19h 40m
United Airlines
Tue 11/36:00 am
OPO
- SAN
3 stops22h 37m
United Airlines
Deal found 6/22![United Airlines logo]()
$831
This Delta deal was found by Cheapflights users on 6/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/278:00 am
SAN
- OPO
2 stops19h 35m
Delta
Tue 11/35:00 am
OPO
- SAN
1 stop15h 10m
Delta
Deal found 6/26![Delta logo]()
$746
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Mon 8/107:00 am
SAN
- OPO
1 stop16h 00m
United Airlines
Thu 8/2011:50 am
OPO
- SAN
2 stops35h 12m
United Airlines
Deal found 6/24![United Airlines logo]()
$833
Last-minute flights from San Diego to PortoDiscover last-minute flight deals from San Diego to Porto. Data last updated June 27, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Porto. Data last updated June 27, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 6/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/297:00 am
SAN
- OPO
1 stop16h 00m
Multiple Airlines
Wed 7/86:00 am
OPO
- SAN
2 stops22h 58m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$1,139
This United Airlines deal was found by Cheapflights users on 6/27. 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 6/297:00 am
SAN
- OPO
1 stop16h 00m
United Airlines
Thu 7/911:50 am
OPO
- SAN
2 stops38h 42m
United Airlines
Deal found 6/27![United Airlines logo]()
$1,150
This Justfly.com deal was found by Cheapflights users on 6/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/297:00 am
SAN
- OPO
1 stop16h 00m
Multiple Airlines
Thu 7/911:50 am
OPO
- SAN
2 stops38h 42m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$1,152
This Gotogate deal was found by Cheapflights users on 6/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/308:15 am
SAN
- OPO
2 stops25h 20m
Multiple Airlines
Wed 7/86:00 am
OPO
- SAN
2 stops22h 58m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$1,140
This Air Canada deal was found by Cheapflights users on 6/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:05 pm
SAN
- OPO
2 stops29h 55m
Air Canada
Mon 7/206:00 am
OPO
- SAN
2 stops23h 44m
Air Canada
Deal found 6/26![Air Canada logo]()
$1,116
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/710:30 pm
SAN
- OPO
1 stop24h 25m
United Airlines
Mon 7/2012:35 pm
OPO
- SAN
1 stop15h 17m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,122
This Delta deal was found by Cheapflights users on 6/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/711:48 am
SAN
- OPO
2 stops19h 37m
Delta
Mon 7/205:00 am
OPO
- SAN
2 stops21h 14m
Delta
Deal found 6/25![Delta logo]()
$1,127
This United Airlines deal was found by Cheapflights users on 6/23. 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 7/217:00 am
SAN
- OPO
1 stop16h 00m
United Airlines
Tue 7/289:00 am
OPO
- SAN
1 stop18h 52m
United Airlines
Deal found 6/23![United Airlines logo]()
$918
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 June 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 June 27, 2026.
This Air France deal was found by Cheapflights users on 6/22. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:00 am
SAN
- OPO
1 stop19h 30m
Air France
Deal found 6/22![Air France logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/143:30 pm
SAN
- OPO
2 stops55h 20m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$405
This Kiwi.com deal was found by Cheapflights users on 6/22. 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.
Wed 10/218:05 pm
SAN
- OPO
3 stops38h 25m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$411
This Expedia deal was found by Cheapflights users on 6/25. 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.
Mon 9/147:00 am
SAN
- OPO
1 stop16h 00m
Air Canada
Deal found 6/25![Air Canada logo]()
$438
This Mytrip deal was found by Cheapflights users on 6/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:15 pm
SAN
- OPO
1 stop22h 10m
Lufthansa
Deal found 6/24![Lufthansa logo]()
$454
This Kiwi.com deal was found by Cheapflights users on 6/24. 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.
Wed 8/126:35 am
SAN
- OPO
3 stops33h 10m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$458
This FlightHub deal was found by Cheapflights users on 6/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1212:35 pm
SAN
- OPO
2 stops58h 25m
Air Canada
Deal found 6/24![Air Canada logo]()
$462
This United Airlines deal was found by Cheapflights users on 6/23. 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.
Sat 9/127:41 pm
SAN
- OPO
3 stops27h 14m
United Airlines
Deal found 6/23![United Airlines logo]()
$463
This KAYAK deal was found by Cheapflights users on 6/22. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/77:00 am
SAN
- OPO
2 stops20h 40m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$1,898
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 June 27, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $737 (KLM) |
One-way from | $348 (Air France) |
Popular in | August |
Cheapest in | February |
Average price | $1,160 |
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 June 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
Quickest round-trip
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Tue 10/27
3:05 pm-3:25 pm
1 stop17h 20m
Porto
Tue 11/3
5:00 am-12:10 pm
1 stop15h 10m
$737
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Tue 11/3
2:05 pm-10:30 pm
1 stop24h 25m
Porto
Thu 11/12
5:00 am-12:10 pm
1 stop15h 10m
$746
San DiegoPorto
SAN - OPO
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
$746
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Tue 10/27
6:50 am-9:30 am
2 stops19h 40m
Porto
Tue 11/3
6:00 am-8:37 pm
3 stops22h 37m
$831
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Mon 8/10
7:00 am-7:00 am
1 stop16h 00m
Porto
Thu 8/20
11:50 am-3:02 pm
2 stops35h 12m
$833
Cheapest one-way
Quickest one-way
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Wed 10/21
11:40 am-10:30 am
2 stops14h 50m
$348
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Wed 10/21
8:05 pm-6:30 pm
3 stops38h 25m
$411
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Sat 9/12
12:35 pm-7:00 am
2 stops58h 25m
$462
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Wed 8/12
6:20 am-7:00 am
2 stops16h 40m
$462
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Sat 9/12
7:41 pm-6:55 am
3 stops27h 14m
$463
Showing 1-10 of 11 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 June.
| 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 August is currently the most expensive (average of $1,393). 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?
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 June 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.
Overall
7.8
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Crew
8.4
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Overall
7.8
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Crew
8.4
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Overall
7.8
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Crew
8.4
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Overall
7.8
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Crew
8.4
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Overall
7.8
Boarding
7.8
Comfort
7.7
Entertainment
7.2
Crew
8.4
Food
7.3
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
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
Aveiro
Arcos de Valdevez
Coimbra
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San Diego and Porto flights
Browse other San Diego and Porto flight options. Last updated on June 27, 2026.
Other flights from San Diego
Browse through other flights departing from San Diego. Flights are based on user searches made on Cheapflights and were last updated on June 27, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 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 2,558,603 searches. Data last updated June 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$590 | Average$968 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$596 | Average$1,050 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$708 | Average$1,342 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$797 | Average$1,061 | FlexibilityNo cancel fee | On-time75% |