$333+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — OPO
Apr 9 — Apr 161
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
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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 March 10, 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 March 10, 2026.
This Delta deal was found by Cheapflights users on 3/8. 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.
Wed 4/226:25 am
SAN
- OPO
2 stops20h 15m
Delta
Wed 4/295:00 am
OPO
- SAN
2 stops25h 29m
Delta
Deal found 3/8![Delta logo]()
$672
This Delta deal was found by Cheapflights users on 3/8. 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.
Wed 5/63:15 pm
SAN
- OPO
2 stops22h 45m
Delta
Wed 5/1311:45 am
OPO
- SAN
1 stop32h 05m
Delta
Deal found 3/8![Delta logo]()
$674
This Cheapflightsfares deal was found by Cheapflights users on 3/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:40 pm
SAN
- OPO
1 stop16h 10m
British Airways
Mon 10/129:10 pm
OPO
- SAN
1 stop25h 45m
British Airways
Deal found 3/9![British Airways logo]()
$676
This Delta deal was found by Cheapflights users on 3/8. 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.
Wed 5/63:15 pm
SAN
- OPO
2 stops22h 45m
Delta
Tue 5/125:00 am
OPO
- SAN
2 stops26h 42m
Delta
Deal found 3/8![Delta logo]()
$684
This KLM deal was found by Cheapflights users on 3/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:00 pm
SAN
- OPO
2 stops17h 30m
KLM
Mon 10/124:20 pm
OPO
- SAN
1 stop27h 30m
KLM
Deal found 3/9![KLM logo]()
$686
This Air Canada deal was found by Cheapflights users on 3/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:00 am
SAN
- OPO
1 stop16h 00m
Air Canada
Tue 8/2512:15 pm
OPO
- SAN
2 stops31h 38m
Air Canada
Deal found 3/10![Air Canada logo]()
$687
This Expedia deal was found by Cheapflights users on 3/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:15 am
SAN
- OPO
2 stops21h 30m
Iberia
Mon 10/128:40 pm
OPO
- SAN
2 stops30h 28m
Iberia
Deal found 3/9![Iberia logo]()
$689
This United Airlines deal was found by Cheapflights users on 3/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/47:00 am
SAN
- OPO
2 stops24h 15m
United Airlines
Tue 12/812:30 pm
OPO
- SAN
2 stops43h 14m
United Airlines
Deal found 3/8![United Airlines logo]()
$691
This Delta deal was found by Cheapflights users on 3/8. 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.
Tue 4/211:40 pm
SAN
- OPO
1 stop20h 40m
Delta
Sun 4/265:00 am
OPO
- SAN
2 stops25h 36m
Delta
Deal found 3/8![Delta logo]()
$718
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Thu 12/247:00 am
SAN
- OPO
2 stops24h 15m
United Airlines
Thu 1/76:00 am
OPO
- SAN
2 stops26h 17m
United Airlines
Deal found 3/6![United Airlines logo]()
$719
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Thu 12/247:00 am
SAN
- OPO
2 stops24h 15m
United Airlines
Wed 1/66:00 am
OPO
- SAN
2 stops24h 28m
United Airlines
Deal found 3/6![United Airlines logo]()
$720
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 March 10, 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 March 10, 2026.
This Delta deal was found by Cheapflights users on 3/7. 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.
Thu 4/301:40 pm
SAN
- OPO
1 stop24h 35m
Delta
Mon 6/111:25 am
OPO
- SAN
1 stop32h 25m
Delta
Deal found 3/7![Delta logo]()
$818
This British Airways deal was found by Cheapflights users on 3/8. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/194:45 pm
SAN
- OPO
1 stop18h 45m
British Airways
Mon 7/138:20 am
OPO
- SAN
2 stops23h 39m
British Airways
Deal found 3/8![British Airways logo]()
$924
This United Airlines deal was found by Cheapflights users on 3/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:40 am
SAN
- OPO
1 stop16h 15m
United Airlines
Tue 6/3012:15 pm
OPO
- SAN
2 stops35h 10m
United Airlines
Deal found 3/9![United Airlines logo]()
$941
This KLM deal was found by Cheapflights users on 3/5. 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.
Sat 5/3010:00 pm
SAN
- OPO
1 stop28h 25m
KLM
Sun 6/1412:25 pm
OPO
- SAN
1 stop16h 23m
KLM
Deal found 3/5![KLM logo]()
$970
This Delta deal was found by Cheapflights users on 3/8. 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.
Mon 5/186:15 am
SAN
- OPO
2 stops31h 45m
Delta
Sat 7/116:30 am
OPO
- SAN
2 stops25h 13m
Delta
Deal found 3/8![Delta logo]()
$871
This Delta deal was found by Cheapflights users on 3/6. 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 5/191:40 pm
SAN
- OPO
1 stop20h 40m
Delta
Mon 6/111:25 am
OPO
- SAN
1 stop32h 25m
Delta
Deal found 3/6![Delta logo]()
$895
This Delta deal was found by Cheapflights users on 3/6. 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 5/191:40 pm
SAN
- OPO
1 stop20h 40m
Delta
Fri 6/195:00 am
OPO
- SAN
2 stops21h 00m
Delta
Deal found 3/6![Delta logo]()
$904
This Delta deal was found by Cheapflights users on 3/8. 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.
Thu 5/281:37 pm
SAN
- OPO
2 stops17h 53m
Delta
Tue 6/25:00 am
OPO
- SAN
1 stop14h 50m
Delta
Deal found 3/8![Delta logo]()
$952
Last-minute flights from San Diego to PortoDiscover last-minute flight deals from San Diego to Porto. Data last updated March 10, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Porto. Data last updated March 10, 2026 and is based on user searches.
This KLM deal was found by Cheapflights users on 3/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/103:00 pm
SAN
- OPO
1 stop17h 25m
KLM
Tue 3/249:55 am
OPO
- SAN
2 stops20h 04m
KLM
Deal found 3/9![KLM logo]()
$810
This KLM deal was found by Cheapflights users on 3/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/123:00 pm
SAN
- OPO
1 stop36h 30m
KLM
Thu 3/195:00 am
OPO
- SAN
1 stop15h 05m
KLM
Deal found 3/8![KLM logo]()
$799
This Delta deal was found by Cheapflights users on 3/7. 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 4/141:40 pm
SAN
- OPO
1 stop20h 40m
Delta
Sun 5/109:25 am
OPO
- SAN
2 stops21h 50m
Delta
Deal found 3/7![Delta logo]()
$724
This KLM deal was found by Cheapflights users on 3/6. 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 4/141:40 pm
SAN
- OPO
1 stop20h 40m
KLM
Sun 5/105:55 am
OPO
- SAN
2 stops20h 08m
KLM
Deal found 3/6![KLM logo]()
$725
This Delta deal was found by Cheapflights users on 3/8. 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.
Tue 4/211:40 pm
SAN
- OPO
1 stop20h 40m
Delta
Sun 4/265:00 am
OPO
- SAN
2 stops25h 36m
Delta
Deal found 3/8![Delta logo]()
$718
This Delta deal was found by Cheapflights users on 3/8. 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.
Wed 4/226:25 am
SAN
- OPO
2 stops20h 15m
Delta
Wed 4/295:00 am
OPO
- SAN
2 stops25h 29m
Delta
Deal found 3/8![Delta logo]()
$672
This Delta deal was found by Cheapflights users on 3/8. 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.
Wed 4/226:25 am
SAN
- OPO
2 stops20h 15m
Delta
Sun 4/265:00 am
OPO
- SAN
2 stops25h 36m
Delta
Deal found 3/8![Delta logo]()
$769
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 March 10, 2026.
Search for one-way flight options from San Diego to Porto. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:35 pm
SAN
- OPO
3 stops53h 50m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:15 am
SAN
- OPO
3 stops43h 10m
Multiple Airlines
Deal found 3/8![Multiple Airlines logo]()
$334
This FlightHub deal was found by Cheapflights users on 3/7. 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.
Mon 6/84:55 pm
SAN
- OPO
2 stops54h 05m
Air Canada
Deal found 3/7![Air Canada logo]()
$385
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 5/310:13 am
SAN
- OPO
3 stops45h 27m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 3/168:06 am
SAN
- OPO
2 stops28h 24m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$405
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 6/33:30 pm
SAN
- OPO
3 stops48h 20m
Multiple Airlines
Deal found 3/5![Multiple Airlines logo]()
$413
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 March 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $672 (Delta) |
One-way from | $333 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $822 |
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 March 10, 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 - OPO
SANOPO
San Diego
Thu 4/30
1:40 pm-10:15 pm
1 stop24h 35m
Porto
Mon 6/1
11:25 am-11:50 am
1 stop32h 25m
$818
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Mon 5/18
6:15 am-10:00 pm
2 stops31h 45m
Porto
Sat 7/11
6:30 am-11:43 pm
2 stops25h 13m
$871
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Tue 5/19
1:40 pm-6:20 pm
1 stop20h 40m
Porto
Mon 6/1
11:25 am-11:50 am
1 stop32h 25m
$895
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Tue 5/19
1:40 pm-6:20 pm
1 stop20h 40m
Porto
Fri 6/19
5:00 am-6:00 pm
2 stops21h 00m
$904
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Tue 5/19
4:45 pm-7:30 pm
1 stop18h 45m
Porto
Mon 7/13
8:20 am-11:59 pm
2 stops23h 39m
$924
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Thu 6/4
6:40 am-6:55 am
1 stop16h 15m
Porto
Tue 6/30
12:15 pm-3:25 pm
2 stops35h 10m
$941
Quickest round-trip
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Thu 5/28
1:37 pm-3:30 pm
2 stops17h 53m
Porto
Tue 6/2
5:00 am-11:50 am
1 stop14h 50m
$952
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Sat 5/30
10:00 pm-10:25 am
1 stop28h 25m
Porto
Sun 6/14
12:25 pm-8:48 pm
1 stop16h 23m
$970
Cheapest one-way
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Thu 4/30
6:15 am-9:25 am
3 stops43h 10m
$334
San DiegoPorto
SAN - OPO
SANOPO
San Diego
Sun 5/3
10:13 am-3:40 pm
3 stops45h 27m
$397
Showing 1-10 of 19 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 March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on San Diego-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Diego-Porto flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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
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 March 10, 2026.
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.
Food
6.6
Comfort
7.3
Entertainment
7.1
Crew
8.1
Boarding
7.7
Overall
7.4
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
Food
6.6
Comfort
7.3
Entertainment
7.1
Crew
8.1
Boarding
7.7
Overall
7.4
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
Food
6.6
Comfort
7.3
Entertainment
7.1
Crew
8.1
Boarding
7.7
Overall
7.4
Reviews
1 / 20
4.0
OkayThomas,Mar 2025
SFO - TPE
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 March 10, 2026.
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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 March 10, 2026.
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 March 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$611 | Average$877 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$615 | Average$1,096 | FlexibilityNo cancel fee | On-time69% |