$271+ 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 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — OPO
Sep 16 — Sep 231
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
Cheapest
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 August 17, 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 August 17, 2026.
This Mytrip deal was found by Cheapflights users on 8/16. 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.
Thu 10/154:30 pm -
3 stops31h 30m
Thu 10/228:20 pm -
2 stops26h 10m
Deal found 8/16![Multiple Airlines logo]()
$711
This Expedia deal was found by Cheapflights users on 8/15. 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.
Wed 11/188:25 am -
2 stops19h 25m
Fri 11/276:15 am -
1 stop21h 20m
Deal found 8/15![Multiple Airlines logo]()
$727
This Expedia deal was found by Cheapflights users on 8/15. 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.
Wed 11/182:45 pm -
1 stop16h 35m
Fri 11/276:15 am -
1 stop21h 20m
Deal found 8/15![Lufthansa logo]()
$735
This oojo deal was found by Cheapflights users on 8/14. 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 12/17:25 pm -
1 stop31h 50m
Thu 12/1012:05 pm -
1 stop36h 25m
Deal found 8/14![SWISS logo]()
$740
This United Airlines deal was found by Cheapflights users on 8/15. 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 12/710:55 pm -
2 stops26h 35m
Fri 12/116:00 am -
1 stop18h 05m
Deal found 8/15![United Airlines logo]()
$745
This Mytrip deal was found by Cheapflights users on 8/14. 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 9/2812:05 am -
2 stops35h 35m
Tue 10/136:30 am -
2 stops22h 17m
Deal found 8/14![Multiple Airlines logo]()
$757
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Tue 9/224:30 pm -
3 stops33h 40m
Wed 10/76:00 pm -
3 stops28h 30m
Deal found 8/14![Multiple Airlines logo]()
$774
This Expedia deal was found by Cheapflights users on 8/15. 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.
Thu 11/198:25 am -
2 stops19h 35m
Fri 11/276:15 am -
1 stop21h 20m
Deal found 8/15![Multiple Airlines logo]()
$776
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 August 17, 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 August 17, 2026.
This United Airlines deal was found by Cheapflights users on 8/13. 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 12/710:55 pm -
2 stops26h 35m
Fri 12/116:00 am -
1 stop18h 05m
Deal found 8/13![United Airlines logo]()
$746
This Delta deal was found by Cheapflights users on 8/16. 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 10/69:54 am -
2 stops21h 31m
Mon 11/211:15 am -
1 stop32h 30m
Deal found 8/16![Delta logo]()
$824
This Scandinavian Airlines deal was found by Cheapflights users on 8/14. 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 10/36:23 am -
2 stops26h 42m
Sun 10/115:55 pm -
2 stops51h 50m
Deal found 8/14![Scandinavian Airlines logo]()
$898
This TAP AIR PORTUGAL deal was found by Cheapflights users on 8/16. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/74:35 pm -
1 stop14h 25m
Fri 12/117:00 am -
1 stop17h 05m
Deal found 8/16![TAP AIR PORTUGAL logo]()
$930
This Delta deal was found by Cheapflights users on 8/16. 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 10/72:40 pm -
2 stops23h 20m
Tue 11/311:15 am -
1 stop32h 30m
Deal found 8/16![Delta logo]()
$824
This United Airlines deal was found by Cheapflights users on 8/14. 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 10/612:35 am -
2 stops22h 25m
Thu 10/156:00 am -
1 stop21h 50m
Deal found 8/14![United Airlines logo]()
$839
This Delta deal was found by Cheapflights users on 8/12. 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 10/194:50 pm -
2 stops21h 10m
Thu 10/295:00 am -
2 stops20h 17m
Deal found 8/12![Delta logo]()
$834
This Delta deal was found by Cheapflights users on 8/16. 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 10/53:05 pm -
1 stop16h 20m
Wed 10/285:00 am -
1 stop14h 45m
Deal found 8/16![Delta logo]()
$837
This United Airlines deal was found by Cheapflights users on 8/16. 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 10/319:05 am -
2 stops17h 25m
Fri 11/66:00 am -
2 stops42h 30m
Deal found 8/16![United Airlines logo]()
$940
This Delta deal was found by Cheapflights users on 8/13. 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 9/221:15 pm -
2 stops18h 10m
Tue 9/295:00 am -
1 stop14h 45m
Deal found 8/13![Delta logo]()
$841
This Delta deal was found by Cheapflights users on 8/15. 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 12/241:50 pm -
1 stop24h 40m
Sat 1/95:00 am -
2 stops18h 08m
Deal found 8/15![Delta logo]()
$884
Last-minute flights from San Francisco to PortoDiscover last-minute flight deals from San Francisco to Porto. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Porto. Data last updated August 17, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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.
Tue 9/87:20 pm -
1 stop18h 20m
Wed 9/1610:30 pm -
1 stop24h 00m
Deal found 8/14![TAP AIR PORTUGAL logo]()
$822
This Gotogate deal was found by Cheapflights users on 8/14. 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 9/207:35 pm -
1 stop28h 20m
Tue 10/612:15 pm -
1 stop36h 00m
Deal found 8/14![SWISS logo]()
$824
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Tue 9/224:30 pm -
3 stops33h 40m
Wed 10/76:00 pm -
3 stops28h 30m
Deal found 8/14![Multiple Airlines logo]()
$774
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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.
Tue 9/224:20 pm -
1 stop20h 05m
Tue 9/2910:30 pm -
1 stop24h 05m
Deal found 8/13![TAP AIR PORTUGAL logo]()
$787
This Mytrip deal was found by Cheapflights users on 8/12. 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 9/2311:10 am -
2 stops24h 35m
Tue 9/296:00 pm -
3 stops34h 47m
Deal found 8/12![Multiple Airlines logo]()
$778
This Gotogate deal was found by Cheapflights users on 8/13. 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.
Thu 9/244:30 pm -
1 stop22h 30m
Wed 9/305:05 am -
1 stop17h 30m
Deal found 8/13![TAP AIR PORTUGAL logo]()
$794
This FlightHub deal was found by Cheapflights users on 8/12. 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.
Fri 9/258:59 pm -
2 stops36h 06m
Wed 9/3011:50 am -
1 stop34h 50m
Deal found 8/12![Scandinavian Airlines logo]()
$816
This Mytrip deal was found by Cheapflights users on 8/14. 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 9/2812:05 am -
2 stops35h 35m
Tue 10/136:30 am -
2 stops22h 17m
Deal found 8/14![Multiple Airlines logo]()
$757
This Gotogate deal was found by Cheapflights users on 8/14. 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 9/284:30 pm -
1 stop18h 30m
Mon 10/511:50 pm -
1 stop21h 45m
Deal found 8/14![TAP AIR PORTUGAL logo]()
$796
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 August 17, 2026.
Search for one-way flight options from San Francisco to Porto. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 11/225:20 pm -
2 stops32h 15m
Deal found 8/13![Multiple Airlines logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/2010:14 pm -
3 stops48h 41m
Deal found 8/14![Multiple Airlines logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 11/138:42 pm -
2 stops57h 08m
Deal found 8/13![Multiple Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/177:11 pm -
3 stops41h 19m
Deal found 8/14![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 11/148:00 am -
3 stops45h 50m
Deal found 8/13![Multiple Airlines logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/159:03 am -
3 stops40h 22m
Deal found 8/14![Multiple Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/191:02 pm -
3 stops33h 48m
Deal found 8/14![Multiple Airlines logo]()
$338
This Expedia deal was found by Cheapflights users on 8/13. 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.
Wed 11/119:40 pm -
1 stop18h 15m
Deal found 8/13![Lufthansa logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 10/277:17 pm -
3 stops43h 38m
Deal found 8/12![Multiple Airlines logo]()
$346
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 August 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $711 (Mytrip) |
One-way from | $271 (Kiwi.com) |
Popular in | June |
Cheapest in | March |
Average price | $1,179 |
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 August 17, 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 San Francisco - OPO Porto
SFOOPO
San Francisco
Mon 12/7
10:55 pm-9:30 am
2 stops26h 35m
Porto
Fri 12/11
6:00 am-4:05 pm
1 stop18h 05m
$746
San FranciscoPorto
SFO San Francisco - OPO Porto
SFOOPO
San Francisco
Tue 10/6
9:54 am-3:25 pm
2 stops21h 31m
Porto
Mon 11/2
11:15 am-11:45 am
1 stop32h 30m
$824
San FranciscoPorto
SFO San Francisco - OPO Porto
SFOOPO
San Francisco
Wed 10/7
2:40 pm-10:00 pm
2 stops23h 20m
Porto
Tue 11/3
11:15 am-11:45 am
1 stop32h 30m
$824
San FranciscoPorto
SFO San Francisco - OPO Porto
SFOOPO
San Francisco
Mon 10/19
4:50 pm-10:00 pm
2 stops21h 10m
Porto
Thu 10/29
5:00 am-6:17 pm
2 stops20h 17m
$834
Quickest round-trip
San FranciscoPorto
SFO San Francisco - OPO Porto
SFOOPO
San Francisco
Mon 10/5
3:05 pm-3:25 pm
1 stop16h 20m
Porto
Wed 10/28
5:00 am-12:45 pm
1 stop14h 45m
$837
San FranciscoPorto
SFO San Francisco - OPO Porto
SFOOPO
San Francisco
Tue 10/6
12:35 am-7:00 am
2 stops22h 25m
Porto
Thu 10/15
6:00 am-7:50 pm
1 stop21h 50m
$839
San FranciscoPorto
SFO San Francisco - OPO Porto
SFOOPO
San Francisco
Tue 9/22
1:15 pm-3:25 pm
2 stops18h 10m
Porto
Tue 9/29
5:00 am-11:45 am
1 stop14h 45m
$841
San FranciscoPorto
SFO San Francisco - OPO Porto
SFOOPO
San Francisco
Thu 12/24
1:50 pm-10:30 pm
1 stop24h 40m
Porto
Sat 1/9
5:00 am-3:08 pm
2 stops18h 08m
$884
San FranciscoPorto
SFO San Francisco - OPO Porto
SFOOPO
San Francisco
Sat 10/3
6:23 am-5:05 pm
2 stops26h 42m
Porto
Sun 10/11
5:55 pm-1:45 pm
2 stops51h 50m
$898
San FranciscoPorto
SFO San Francisco - OPO Porto
SFOOPO
San Francisco
Mon 12/7
4:35 pm-3:00 pm
1 stop14h 25m
Porto
Fri 12/11
7:00 am-4:05 pm
1 stop17h 05m
$930
Showing 1-10 of 21 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 August.
| 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 84 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, March is the cheapest month in which you can book a flight from San Francisco to Porto (average of $612). Flying from San Francisco to Porto in June is currently the most expensive (average of $1,317). 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?
Airfare is below average for this route at the moment.
San Francisco to Porto flights typically cost between $905 and $1,296 in October.The cheapest round-trip price found within the last 5 days was $711 on Multiple Airlines (Oct 15-Oct 22).
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 17, 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.
Crew
8.5
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
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
Arcos de Valdevez
Coimbra
Aveiro
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Find flights from San Francisco to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Francisco and Porto flights
Browse other San Francisco and Porto flight options. Last updated on August 17, 2026.
Other flights from San Francisco
Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on August 17, 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 August 17, 2026.
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 August 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$431 | Average$905 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$480 | Average$612 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$625 | Average$1,001 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$643 | Average$904 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$654 | Average$789 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$661 | Average$1,109 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$664 | Average$1,199 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$683 | Average$1,040 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$855 | Average$1,100 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$860 | Average$1,283 | FlexibilityNo cancel fee | On-time67% |