$357+ Cheap flights from San Francisco (SFO) 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — OPO
Aug 3 — Aug 101
Round-trip
1 adult, Economy
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Find cheap flights from San Francisco 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 Francisco to Porto
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Best
Last-minute
One-way
Cheapest flights from San Francisco to PortoExplore the most affordable flight options available from San Francisco to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 4, 2026.
Explore the most affordable flight options available from San Francisco to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 4, 2026.
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:45 pm
SFO
- OPO
1 stop16h 15m
Scandinavian Airlines
Wed 11/411:55 am
OPO
- SFO
1 stop34h 55m
Scandinavian Airlines
Deal found 6/29![Scandinavian Airlines logo]()
$628
This Scandinavian Airlines deal was found by Cheapflights users on 7/3. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/154:45 pm
SFO
- OPO
1 stop18h 45m
Scandinavian Airlines
Fri 8/285:55 pm
OPO
- SFO
1 stop28h 45m
Scandinavian Airlines
Deal found 7/3![Scandinavian Airlines logo]()
$655
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/94:30 pm
SFO
- OPO
2 stops21h 25m
Multiple Airlines
Mon 8/1710:40 pm
OPO
- SFO
2 stops23h 50m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$703
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:30 pm
SFO
- OPO
3 stops34h 20m
Multiple Airlines
Wed 9/210:00 pm
OPO
- SFO
2 stops24h 30m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$726
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:45 pm
SFO
- OPO
2 stops33h 55m
Scandinavian Airlines
Wed 10/2811:55 am
OPO
- SFO
1 stop34h 55m
Scandinavian Airlines
Deal found 7/1![Scandinavian Airlines logo]()
$733
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:10 am
SFO
- OPO
1 stop14h 50m
Multiple Airlines
Tue 10/206:00 am
OPO
- SFO
2 stops23h 20m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$738
This Mytrip deal was found by Cheapflights users on 7/2. 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.
Sun 8/164:30 pm
SFO
- OPO
3 stops32h 30m
Multiple Airlines
Sat 8/296:10 pm
OPO
- SFO
2 stops28h 20m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$739
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:05 pm
SFO
- OPO
1 stop18h 20m
Lufthansa
Tue 10/206:20 am
OPO
- SFO
1 stop20h 40m
Lufthansa
Deal found 6/29![Lufthansa logo]()
$748
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:00 am
SFO
- OPO
2 stops21h 35m
Delta
Wed 11/45:00 am
OPO
- SFO
2 stops20h 13m
Delta
Deal found 6/29![Delta logo]()
$756
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/135:00 am
SFO
- OPO
2 stops18h 00m
Air Canada
Tue 10/206:00 am
OPO
- SFO
2 stops20h 41m
Air Canada
Deal found 6/29![Air Canada logo]()
$757
Best flights from San Francisco to PortoDiscover carefully curated flight deals from San Francisco to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 4, 2026.
Discover carefully curated flight deals from San Francisco to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 4, 2026.
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:00 am
SFO
- OPO
1 stop19h 30m
Delta
Wed 9/25:00 am
OPO
- SFO
1 stop14h 45m
Delta
Deal found 6/29![Delta logo]()
$835
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/219:15 pm
SFO
- OPO
1 stop25h 00m
United Airlines
Tue 9/2912:15 pm
OPO
- SFO
1 stop31h 02m
United Airlines
Deal found 7/1![United Airlines logo]()
$836
This United 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:49 pm
SFO
- OPO
2 stops26h 26m
Multiple Airlines
Wed 9/211:20 am
OPO
- SFO
2 stops20h 47m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$845
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:45 pm
SFO
- OPO
1 stop24h 30m
KLM
Sun 10/1111:45 am
OPO
- SFO
1 stop32h 00m
KLM
Deal found 6/30![KLM logo]()
$900
This Delta deal was found by Cheapflights users on 7/3. 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.
Fri 10/211:35 am
SFO
- OPO
1 stop14h 55m
Delta
Fri 10/305:00 am
OPO
- SFO
1 stop14h 45m
Delta
Deal found 7/3![Delta logo]()
$837
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.
Wed 8/58:15 am
SFO
- OPO
1 stop14h 40m
United Airlines
Tue 8/1112:15 pm
OPO
- SFO
2 stops31h 10m
United Airlines
Deal found 6/29![United Airlines logo]()
$899
This Delta deal was found by Cheapflights users on 7/3. 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.
Fri 10/211:35 am
SFO
- OPO
1 stop14h 55m
Delta
Thu 10/2911:15 am
OPO
- SFO
1 stop32h 30m
Delta
Deal found 7/3![Delta logo]()
$837
This Delta deal was found by Cheapflights users on 7/3. 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 10/11:45 pm
SFO
- OPO
1 stop36h 55m
Delta
Wed 10/2811:15 am
OPO
- SFO
1 stop32h 30m
Delta
Deal found 7/3![Delta logo]()
$840
This Delta deal was found by Cheapflights users on 7/3. 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 9/262:05 pm
SFO
- OPO
1 stop36h 20m
Delta
Wed 10/2811:15 am
OPO
- SFO
1 stop32h 30m
Delta
Deal found 7/3![Delta logo]()
$849
This Delta deal was found by Cheapflights users on 7/3. 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 9/283:05 pm
SFO
- OPO
1 stop16h 20m
Delta
Sat 10/245:00 am
OPO
- SFO
1 stop14h 45m
Delta
Deal found 7/3![Delta logo]()
$896
This Delta deal was found by Cheapflights users on 7/3. 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 9/301:45 pm
SFO
- OPO
1 stop17h 45m
Delta
Sat 10/245:00 am
OPO
- SFO
1 stop14h 45m
Delta
Deal found 7/3![Delta logo]()
$900
Last-minute flights from San Francisco to PortoDiscover last-minute flight deals from San Francisco to Porto. Data last updated July 4, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Porto. Data last updated July 4, 2026 and is based on user searches.
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/94:30 pm
SFO
- OPO
2 stops21h 25m
Multiple Airlines
Mon 8/1710:40 pm
OPO
- SFO
2 stops23h 50m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$703
This Scandinavian Airlines deal was found by Cheapflights users on 7/3. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/154:45 pm
SFO
- OPO
1 stop18h 45m
Scandinavian Airlines
Fri 8/285:55 pm
OPO
- SFO
1 stop28h 45m
Scandinavian Airlines
Deal found 7/3![Scandinavian Airlines logo]()
$655
This Mytrip deal was found by Cheapflights users on 7/2. 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.
Sun 8/164:30 pm
SFO
- OPO
3 stops32h 30m
Multiple Airlines
Sat 8/296:10 pm
OPO
- SFO
2 stops28h 20m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$739
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/164:30 pm
SFO
- OPO
3 stops33h 30m
Multiple Airlines
Wed 8/2610:00 pm
OPO
- SFO
2 stops24h 30m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$766
This Mytrip deal was found by Cheapflights users on 7/2. 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.
Sun 8/164:30 pm
SFO
- OPO
2 stops20h 50m
Multiple Airlines
Fri 8/2110:30 pm
OPO
- SFO
2 stops24h 00m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$777
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:30 pm
SFO
- OPO
3 stops34h 20m
Multiple Airlines
Wed 9/210:00 pm
OPO
- SFO
2 stops24h 30m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$726
This Expedia deal was found by Cheapflights users on 7/3. 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.
Sun 8/234:45 pm
SFO
- OPO
2 stops21h 30m
Scandinavian Airlines
Wed 9/211:50 am
OPO
- SFO
1 stop34h 50m
Scandinavian Airlines
Deal found 7/3![Scandinavian Airlines logo]()
$763
This Mytrip deal was found by Cheapflights users on 7/3. 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.
Sun 8/234:45 pm
SFO
- OPO
2 stops20h 35m
Multiple Airlines
Wed 9/212:00 pm
OPO
- SFO
2 stops34h 40m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$797
One-way flights from San Francisco to PortoSearch for one-way flight options from San Francisco to Porto. Find affordable one-way fares based on user searches. Data last updated July 4, 2026.
Search for one-way flight options from San Francisco to Porto. Find affordable one-way fares based on user searches. Data last updated July 4, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:35 pm
SFO
- OPO
3 stops43h 40m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$357
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:30 pm
SFO
- OPO
3 stops43h 40m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$358
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1410:48 pm
SFO
- OPO
3 stops35h 32m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$363
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:40 pm
SFO
- OPO
2 stops29h 30m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$370
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:35 pm
SFO
- OPO
3 stops41h 50m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$378
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/75:35 pm
SFO
- OPO
2 stops29h 15m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$384
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:05 pm
SFO
- OPO
2 stops18h 50m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 7/3. 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 9/28:10 am
SFO
- OPO
3 stops31h 40m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$395
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:00 am
SFO
- OPO
3 stops33h 10m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$399
Find flight deals from San Francisco to Porto
Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) 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 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $628 (FlightHub) |
One-way from | $357 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $1,139 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco 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 4, 2026.
Use the filters below to find and compare flights from San Francisco to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Mon 8/17
7:00 am-10:30 am
1 stop19h 30m
Porto
Wed 9/2
5:00 am-11:45 am
1 stop14h 45m
$835
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Mon 9/21
9:15 pm-6:15 am
1 stop25h 00m
Porto
Tue 9/29
12:15 pm-11:17 am
1 stop31h 02m
$836
Quickest round-trip
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Fri 10/2
11:35 am-10:30 am
1 stop14h 55m
Porto
Fri 10/30
5:00 am-12:45 pm
1 stop14h 45m
$837
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Fri 10/2
11:35 am-10:30 am
1 stop14h 55m
Porto
Thu 10/29
11:15 am-12:45 pm
1 stop32h 30m
$837
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Thu 10/1
1:45 pm-10:40 am
1 stop36h 55m
Porto
Wed 10/28
11:15 am-12:45 pm
1 stop32h 30m
$840
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Mon 8/17
7:49 pm-6:15 am
2 stops26h 26m
Porto
Wed 9/2
11:20 am-12:07 am
2 stops20h 47m
$845
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Sat 9/26
2:05 pm-10:25 am
1 stop36h 20m
Porto
Wed 10/28
11:15 am-12:45 pm
1 stop32h 30m
$849
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Mon 9/28
3:05 pm-3:25 pm
1 stop16h 20m
Porto
Sat 10/24
5:00 am-11:45 am
1 stop14h 45m
$896
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Wed 8/5
8:15 am-6:55 am
1 stop14h 40m
Porto
Tue 8/11
12:15 pm-11:25 am
2 stops31h 10m
$899
San FranciscoPorto
SFO - OPO
SFOOPO
San Francisco
Thu 10/1
1:45 pm-10:15 pm
1 stop24h 30m
Porto
Sun 10/11
11:45 am-11:45 am
1 stop32h 00m
$900
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from San Francisco 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 Francisco to Porto in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| 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 Francisco-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Porto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Francisco-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 Francisco-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 Francisco to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from San Francisco with our price prediction graph.
SFO-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 Francisco to Porto
How far ahead should I book a flight from San Francisco to Porto?
To ensure you get the cheapest price possible for a flight from San Francisco to Porto, you should look to book at least 82 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from San Francisco to Porto?
Currently, February is the cheapest month in which you can book a flight from San Francisco to Porto (average of $588). Flying from San Francisco to Porto in June is currently the most expensive (average of $1,303). 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 Francisco 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 July 4, 2026.
Read reviews from past customers who have flown Delta,SWISS, andUnited Airlines from San Francisco to Porto. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Food
7.2
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Food
7.2
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Food
7.2
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Food
7.2
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Food
7.2
Crew
8.5
Boarding
8.1
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Related info for your journey
Find useful and relevant information for your journey from San Francisco 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 Francisco and Porto flights
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Top 10 airlines flying from San Francisco to Porto
Discover the top 10 airlines that operate flights from San Francisco 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 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$431 | Average$803 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$480 | Average$612 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$625 | Average$1,002 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$643 | Average$904 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$654 | Average$789 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$675 | Average$1,031 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$676 | Average$1,116 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$683 | Average$1,040 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$778 | Average$1,212 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$787 | Average$987 | FlexibilityNo cancel fee | On-time67% |