$420+ Cheap flights from Portugal to San Francisco (SFO)
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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SFO
Jun 20 — Jun 271
Round-trip
1 adult, Economy
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Cheapest flights from Portugal to San FranciscoExplore the most affordable flight options available from Portugal to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 21, 2026.
Explore the most affordable flight options available from Portugal to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 21, 2026.
This SWISS deal was found by Cheapflights users on 5/19. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:25 pm
LIS
- SFO
1 stop29h 50m
SWISS
Sun 9/137:35 pm
SFO
- LIS
1 stop19h 50m
SWISS
Deal found 5/19![SWISS logo]()
$758
This oojo deal was found by Cheapflights users on 5/20. 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.
Wed 11/114:55 pm
LIS
- SFO
1 stop29h 55m
Scandinavian Airlines
Thu 12/34:45 pm
SFO
- LIS
1 stop15h 20m
Scandinavian Airlines
Deal found 5/20![Scandinavian Airlines logo]()
$760
This oojo deal was found by Cheapflights users on 5/18. 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.
Wed 11/1111:55 am
OPO
- SFO
1 stop34h 55m
Scandinavian Airlines
Thu 12/34:45 pm
SFO
- OPO
1 stop16h 10m
Scandinavian Airlines
Deal found 5/18![Scandinavian Airlines logo]()
$774
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 9/146:00 am
LIS
- SFO
2 stops23h 55m
Multiple Airlines
Mon 9/285:35 pm
SFO
- LIS
1 stop17h 20m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$801
This Gotogate deal was found by Cheapflights users on 5/17. 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 8/247:20 pm
OPO
- SFO
1 stop28h 55m
SWISS
Mon 8/317:35 pm
SFO
- OPO
1 stop31h 50m
SWISS
Deal found 5/17![SWISS logo]()
$811
This Delta deal was found by Cheapflights users on 5/18. 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 9/235:00 am
OPO
- SFO
1 stop14h 45m
Delta
Wed 10/711:05 am
SFO
- OPO
2 stops20h 20m
Delta
Deal found 5/18![Delta logo]()
$815
This Expedia deal was found by Cheapflights users on 5/19. 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 8/265:05 am
LIS
- SFO
1 stop15h 35m
Lufthansa
Wed 9/169:05 pm
SFO
- LIS
1 stop17h 40m
Lufthansa
Deal found 5/19![Lufthansa logo]()
$819
This KLM deal was found by Cheapflights users on 5/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:20 pm
OPO
- SFO
1 stop27h 25m
KLM
Wed 10/71:45 pm
SFO
- OPO
1 stop17h 45m
KLM
Deal found 5/16![KLM logo]()
$821
This Delta deal was found by Cheapflights users on 5/19. 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 6/45:00 am
OPO
- SFO
1 stop14h 45m
Delta
Mon 6/85:25 pm
SFO
- OPO
2 stops16h 45m
Delta
Deal found 5/19![Delta logo]()
$822
This Delta deal was found by Cheapflights users on 5/18. 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 9/95:00 am
LIS
- SFO
1 stop14h 45m
Delta
Wed 9/302:20 pm
SFO
- LIS
2 stops19h 30m
Delta
Deal found 5/18![Delta logo]()
$823
This KLM deal was found by Cheapflights users on 5/19. 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 8/247:45 pm
LIS
- SFO
1 stop24h 00m
Multiple Airlines
Tue 9/158:10 pm
SFO
- LIS
1 stop18h 15m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$824
This Delta deal was found by Cheapflights users on 5/19. 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 8/265:00 am
LIS
- SFO
1 stop14h 45m
Delta
Thu 9/101:05 pm
SFO
- LIS
2 stops20h 45m
Delta
Deal found 5/19![Delta logo]()
$825
Best flights from Portugal to San FranciscoDiscover carefully curated flight deals from Portugal to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 21, 2026.
Discover carefully curated flight deals from Portugal to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 21, 2026.
This Delta deal was found by Cheapflights users on 5/16. 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 9/235:00 am
OPO
- SFO
1 stop14h 45m
Delta
Wed 10/711:05 am
SFO
- OPO
2 stops20h 20m
Delta
Deal found 5/16![Delta logo]()
$816
This KLM deal was found by Cheapflights users on 5/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:20 pm
OPO
- SFO
1 stop27h 25m
KLM
Wed 10/71:45 pm
SFO
- OPO
1 stop17h 45m
KLM
Deal found 5/16![KLM logo]()
$821
This KLM deal was found by Cheapflights users on 5/19. 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 8/247:45 pm
LIS
- SFO
1 stop24h 00m
Multiple Airlines
Thu 9/103:05 pm
SFO
- LIS
1 stop15h 50m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$824
This SWISS deal was found by Cheapflights users on 5/16. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/138:40 am
OPO
- SFO
2 stops18h 15m
SWISS
Mon 6/227:35 pm
SFO
- OPO
1 stop28h 20m
SWISS
Deal found 5/16![SWISS logo]()
$835
This United Airlines deal was found by Cheapflights users on 5/21. 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 6/512:05 pm
OPO
- SFO
1 stop15h 45m
United Airlines
Fri 6/1911:59 pm
SFO
- OPO
1 stop22h 56m
United Airlines
Deal found 5/21![United Airlines logo]()
$843
This deal was found by Cheapflights users on 5/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/314:25 am
FNC
- SFO
1 stop17h 40m
TAP AIR PORTUGAL
Wed 9/304:35 pm
SFO
- FNC
1 stop18h 00m
TAP AIR PORTUGAL
Deal found 5/19![TAP AIR PORTUGAL logo]()
$846
This Lufthansa deal was found by Cheapflights users on 5/18. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/45:05 am
LIS
- SFO
1 stop15h 35m
Lufthansa
Sat 6/1312:45 pm
SFO
- LIS
1 stop13h 50m
Lufthansa
Deal found 5/18![Lufthansa logo]()
$875
This British Airways deal was found by Cheapflights users on 5/17. 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.
Thu 9/31:15 pm
FNC
- SFO
1 stop32h 35m
British Airways
Sun 9/274:35 pm
SFO
- FNC
1 stop34h 55m
British Airways
Deal found 5/17![British Airways logo]()
$1,210
This Condor deal was found by Cheapflights users on 5/17. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/304:15 pm
FNC
- SFO
2 stops51h 24m
Condor
Tue 9/294:30 pm
SFO
- FNC
1 stop39h 00m
Condor
Deal found 5/17![Condor logo]()
$1,236
This Delta deal was found by Cheapflights users on 5/20. 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 8/265:00 am
LIS
- SFO
1 stop14h 45m
Delta
Wed 9/92:20 pm
SFO
- LIS
2 stops19h 30m
Delta
Deal found 5/20![Delta logo]()
$823
This KLM deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/134:25 pm
OPO
- SFO
1 stop28h 25m
KLM
Sun 9/203:05 pm
SFO
- OPO
1 stop22h 55m
KLM
Deal found 5/20![KLM logo]()
$835
This Lufthansa deal was found by Cheapflights users on 5/18. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/75:05 am
LIS
- SFO
1 stop15h 35m
Lufthansa
Sat 6/1312:45 pm
SFO
- LIS
1 stop13h 50m
Lufthansa
Deal found 5/18![Lufthansa logo]()
$875
This Delta deal was found by Cheapflights users on 5/19. 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 8/265:00 am
LIS
- SFO
1 stop14h 45m
Delta
Thu 9/101:05 pm
SFO
- LIS
2 stops20h 45m
Delta
Deal found 5/19![Delta logo]()
$825
This SWISS deal was found by Cheapflights users on 5/17. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/153:50 pm
LIS
- SFO
1 stop32h 25m
SWISS
Mon 6/297:35 pm
SFO
- LIS
1 stop19h 50m
SWISS
Deal found 5/17![SWISS logo]()
$913
This KLM deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/134:25 pm
OPO
- SFO
1 stop28h 25m
KLM
Sat 9/1910:45 pm
SFO
- OPO
1 stop27h 40m
KLM
Deal found 5/20![KLM logo]()
$844
This United Airlines deal was found by Cheapflights users on 5/19. 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 7/39:40 am
FNC
- SFO
1 stop18h 57m
United Airlines
Fri 7/1011:59 pm
SFO
- FNC
1 stop23h 06m
United Airlines
Deal found 5/19![United Airlines logo]()
$984
This TAP AIR PORTUGAL deal was found by Cheapflights users on 5/17. 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.
Sun 8/309:55 pm
FNC
- SFO
1 stop24h 10m
TAP AIR PORTUGAL
Mon 9/284:30 pm
SFO
- FNC
1 stop18h 05m
TAP AIR PORTUGAL
Deal found 5/17![TAP AIR PORTUGAL logo]()
$1,052
This Delta deal was found by Cheapflights users on 5/19. 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 8/2411:55 am
LIS
- SFO
1 stop31h 50m
Delta
Fri 9/118:10 pm
SFO
- LIS
1 stop28h 40m
Delta
Deal found 5/19![Delta logo]()
$885
This KLM deal was found by Cheapflights users on 5/20. 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 6/117:10 pm
OPO
- SFO
1 stop24h 35m
KLM
Sat 7/48:10 pm
SFO
- OPO
1 stop17h 50m
KLM
Deal found 5/20![KLM logo]()
$886
This SWISS deal was found by Cheapflights users on 5/17. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:00 am
FNC
- SFO
1 stop38h 15m
SWISS
Thu 10/17:35 pm
SFO
- FNC
1 stop29h 35m
SWISS
Deal found 5/17![SWISS logo]()
$1,034
This Delta deal was found by Cheapflights users on 5/19. 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 8/255:00 am
LIS
- SFO
2 stops19h 51m
Delta
Tue 9/157:00 am
SFO
- LIS
2 stops20h 15m
Delta
Deal found 5/19![Delta logo]()
$888
This TAP AIR PORTUGAL deal was found by Cheapflights users on 5/20. 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.
Tue 9/1512:40 pm
FNC
- SFO
1 stop33h 55m
TAP AIR PORTUGAL
Sat 9/197:35 pm
SFO
- FNC
1 stop15h 00m
TAP AIR PORTUGAL
Deal found 5/20![TAP AIR PORTUGAL logo]()
$1,093
This Delta deal was found by Cheapflights users on 5/18. 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 6/115:00 am
OPO
- SFO
2 stops21h 13m
Delta
Sat 7/411:45 am
SFO
- OPO
2 stops19h 40m
Delta
Deal found 5/18![Delta logo]()
$890
This Condor deal was found by Cheapflights users on 5/17. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:40 pm
FNC
- SFO
2 stops52h 24m
Condor
Sat 10/310:20 pm
SFO
- FNC
2 stops34h 30m
Condor
Deal found 5/17![Condor logo]()
$1,430
This Mytrip deal was found by Cheapflights users on 5/19. 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.
Fri 7/37:00 am
FNC
- SFO
2 stops35h 45m
Multiple Airlines
Fri 7/1012:15 pm
SFO
- FNC
3 stops24h 25m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$1,447
This Delta deal was found by Cheapflights users on 5/19. 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 8/2411:55 am
LIS
- SFO
2 stops20h 41m
Delta
Thu 9/101:05 pm
SFO
- LIS
2 stops20h 45m
Delta
Deal found 5/19![Delta logo]()
$900
This Delta deal was found by Cheapflights users on 5/18. 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 6/155:00 am
LIS
- SFO
2 stops21h 58m
Delta
Mon 6/291:20 pm
SFO
- LIS
2 stops21h 25m
Delta
Deal found 5/18![Delta logo]()
$904
Last-minute flights from Portugal to San FranciscoDiscover last-minute flight deals from Portugal to San Francisco. Data last updated May 21, 2026 and is based on user searches.
Discover last-minute flight deals from Portugal to San Francisco. Data last updated May 21, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/249:40 am
FNC
- SFO
1 stop18h 57m
United Airlines
Sat 5/306:00 am
SFO
- FNC
1 stop17h 05m
United Airlines
Deal found 5/17![United Airlines logo]()
$878
This Gotogate deal was found by Cheapflights users on 5/20. 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 5/2811:25 am
LIS
- SFO
1 stop17h 37m
Multiple Airlines
Wed 6/109:05 pm
SFO
- LIS
1 stop17h 40m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$945
This Delta deal was found by Cheapflights users on 5/19. 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 5/305:00 am
LIS
- SFO
2 stops18h 56m
Delta
Mon 6/85:55 am
SFO
- LIS
2 stops21h 20m
Delta
Deal found 5/19![Delta logo]()
$830
This KLM deal was found by Cheapflights users on 5/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:10 am
OPO
- SFO
1 stop19h 50m
KLM
Sat 6/2011:30 am
SFO
- OPO
1 stop14h 50m
KLM
Deal found 5/16![KLM logo]()
$843
This Delta deal was found by Cheapflights users on 5/19. 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 6/45:00 am
OPO
- SFO
1 stop14h 45m
Delta
Mon 6/85:25 pm
SFO
- OPO
2 stops16h 45m
Delta
Deal found 5/19![Delta logo]()
$822
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 6/56:00 am
OPO
- SFO
1 stop17h 15m
Multiple Airlines
Sat 6/207:00 am
SFO
- OPO
1 stop18h 45m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$835
This United Airlines deal was found by Cheapflights users on 5/18. 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 6/512:05 pm
OPO
- SFO
1 stop15h 45m
United Airlines
Fri 6/1910:35 pm
SFO
- OPO
1 stop24h 20m
United Airlines
Deal found 5/18![United Airlines logo]()
$844
This United Airlines deal was found by Cheapflights users on 5/18. 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 6/56:00 am
OPO
- SFO
2 stops22h 10m
United Airlines
Sat 6/205:00 am
SFO
- OPO
2 stops17h 55m
United Airlines
Deal found 5/18![United Airlines logo]()
$850
This SWISS deal was found by Cheapflights users on 5/16. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/137:20 pm
OPO
- SFO
1 stop28h 55m
SWISS
Mon 6/227:35 pm
SFO
- OPO
1 stop28h 20m
SWISS
Deal found 5/16![SWISS logo]()
$834
This Delta deal was found by Cheapflights users on 5/21. 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 6/175:00 am
OPO
- SFO
2 stops21h 13m
Delta
Wed 6/241:38 pm
SFO
- OPO
2 stops17h 52m
Delta
Deal found 5/21![Delta logo]()
$825
This Booking.com deal was found by Cheapflights users on 5/21. 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.
Wed 6/176:45 pm
OPO
- SFO
1 stop29h 30m
Multiple Airlines
Wed 6/249:05 pm
SFO
- OPO
1 stop18h 20m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$833
This SWISS deal was found by Cheapflights users on 5/20. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/178:40 am
OPO
- SFO
1 stop15h 35m
SWISS
Wed 6/242:21 pm
SFO
- OPO
2 stops20h 09m
SWISS
Deal found 5/20![SWISS logo]()
$853
One-way flights from Portugal to San FranciscoSearch for one-way flight options from Portugal to San Francisco. Find affordable one-way fares based on user searches. Data last updated May 21, 2026.
Search for one-way flight options from Portugal to San Francisco. Find affordable one-way fares based on user searches. Data last updated May 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 10/198:35 am
OPO
- SFO
2 stops44h 43m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$420
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 6/110:40 pm
OPO
- SFO
2 stops47h 55m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$425
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 9/89:30 pm
OPO
- SFO
2 stops25h 05m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$427
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 6/36:30 am
OPO
- SFO
3 stops39h 20m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$430
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 6/99:30 pm
OPO
- SFO
2 stops25h 05m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$432
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 6/166:35 pm
OPO
- SFO
2 stops51h 55m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$439
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 6/21:00 pm
OPO
- SFO
2 stops33h 35m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$440
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 6/1510:40 pm
OPO
- SFO
2 stops47h 55m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$442
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 9/912:00 pm
OPO
- SFO
2 stops34h 30m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$444
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 7/107:00 am
FNC
- SFO
3 stops37h 00m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$681
This Kissandfly.com deal was found by Cheapflights users on 5/16. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:30 am
LIS
- SFO
1 stop22h 20m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$701
This Justfly.com deal was found by Cheapflights users on 5/17. 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.
Tue 5/2610:15 pm
LIS
- SFO
1 stop25h 40m
Aer Lingus
Deal found 5/17![Aer Lingus logo]()
$703
Find flight deals from Portugal to San Francisco
Keep the following information in mind while searching for Portugal to San Francisco flight deals. Data was last updated May 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $758 (SWISS) |
One-way from | $420 (Kiwi.com) |
Popular in | June |
Cheapest in | February |
Average price | $841 |
Good one-way deal | $808 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Portugal to San Francisco 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 May 21, 2026.
Use the filters below to find and compare flights from Portugal to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortoSan Francisco
OPO - SFO
OPOSFO
Porto
Wed 9/23
5:00 am-11:45 am
1 stop14h 45m
San Francisco
Wed 10/7
11:05 am-3:25 pm
2 stops20h 20m
$816
PortoSan Francisco
OPO - SFO
OPOSFO
Porto
Wed 9/23
4:20 pm-11:45 am
1 stop27h 25m
San Francisco
Wed 10/7
1:45 pm-3:30 pm
1 stop17h 45m
$821
LisbonSan Francisco
LIS - SFO
LISSFO
Lisbon Humberto Delgado
Wed 8/26
5:00 am-11:45 am
1 stop14h 45m
San Francisco
Wed 9/9
2:20 pm-5:50 pm
2 stops19h 30m
$823
LisbonSan Francisco
LIS - SFO
LISSFO
Lisbon Humberto Delgado
Mon 8/24
7:45 pm-11:45 am
1 stop24h 00m
San Francisco
Thu 9/10
3:05 pm-2:55 pm
1 stop15h 50m
$824
LisbonSan Francisco
LIS - SFO
LISSFO
Lisbon Humberto Delgado
Wed 8/26
5:00 am-11:45 am
1 stop14h 45m
San Francisco
Thu 9/10
1:05 pm-5:50 pm
2 stops20h 45m
$825
PortoSan Francisco
OPO - SFO
OPOSFO
Porto
Sat 6/13
8:40 am-6:55 pm
2 stops18h 15m
San Francisco
Mon 6/22
7:35 pm-7:55 am
1 stop28h 20m
$835
PortoSan Francisco
OPO - SFO
OPOSFO
Porto
Sun 9/13
4:25 pm-12:50 pm
1 stop28h 25m
San Francisco
Sun 9/20
3:05 pm-10:00 pm
1 stop22h 55m
$835
PortoSan Francisco
OPO - SFO
OPOSFO
Porto
Fri 6/5
12:05 pm-7:50 pm
1 stop15h 45m
San Francisco
Fri 6/19
11:59 pm-6:55 am
1 stop22h 56m
$843
PortoSan Francisco
OPO - SFO
OPOSFO
Porto
Sun 9/13
4:25 pm-12:50 pm
1 stop28h 25m
San Francisco
Sat 9/19
10:45 pm-10:25 am
1 stop27h 40m
$844
FunchalSan Francisco
FNC - SFO
FNCSFO
Funchal Madeira
Mon 8/31
4:25 am-2:05 pm
1 stop17h 40m
San Francisco
Wed 9/30
4:35 pm-6:35 pm
1 stop18h 00m
$846
Showing 1-10 of 51 resultsSorted by cheapest first
Best time to book a flight from Portugal to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Portugal with our price prediction graph.
OPO-SFO
LIS-SFO
FNC-SFO
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 Portugal to San Francisco
PT0-SFO
OPO-SFO
LIS-SFO
FNC-SFO
What is the cheapest month to book a flight from Portugal to San Francisco?
Currently, September is the cheapest month in which you can book a flight from Portugal to San Francisco (average of $250). Flying from Portugal to San Francisco in July is currently the most expensive (average of $691). 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.
What is the cheapest time of day to fly from PT to SFO?
Find hourly flight availability from Portugal to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 21, 2026.
When flying from Portugal to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How often are flights from Portugal to San Francisco delayed?
About 16% of weekly flights between Portugal and San Francisco have experienced delays in the past year, with the average delay time being 110 minutes.
What is the most punctual flight time for Portugal to San Francisco flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Monday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Portugal to San Francisco flights?
Over the last year, TAP AIR PORTUGAL have had the lowest number of delays on this route, with just 16% of flights being delayed.
How far ahead should I book a flight from Portugal to San Francisco?
The best time to book flights from Portugal to San Francisco is 90 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Reviews of airlines servicing San Francisco
Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated May 21, 2026.
Read reviews from past customers who have flown Delta,Air France, andUnited Airlines from Portugal to San Francisco. 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
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Entertainment
7.8
Boarding
8.1
Overall
7.9
Comfort
7.8
Food
7.2
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Related info for your journey
Find useful and relevant information for your journey from Portugal to San Francisco. 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 San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsSouth San Francisco
Santa Cruz
Santa Clara
Fairfield
Rancho Cordova
San Bruno
Watsonville
San Ramon
Vacaville
Roseville
San Carlos
Redwood City
Sunnyvale
Turlock
Vallejo
San Lorenzo
Davis
Emeryville
Manteca
Elk Grove
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Portugal and San Francisco flights
Browse other Portugal and San Francisco flight options. Last updated on May 21, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Other flights to San Francisco
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on May 21, 2026.
Portugal to San Francisco flights
Consider these flights traveling from Portugal to San Francisco.
Top 7 airlines flying from Portugal to San Francisco
Discover the top 7 airlines that operate flights from Portugal to San Francisco. 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 May 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$604 | Average$873 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$642 | Average$830 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$655 | Average$824 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$688 | Average$901 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$708 | Average$800 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$718 | Average$850 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$764 | Average$902 | FlexibilityNo cancel fee | On-time69% |