$298+ Cheap flights from Seattle (SEA) to Portugal
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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
May 29 — Jun 51
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Portugal with Cheapflights
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Cheapest flights from Seattle to PortugalExplore the most affordable flight options available from Seattle to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
Explore the most affordable flight options available from Seattle to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
This Gotogate deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:55 pm
SEA
- LIS
1 stop20h 45m
Multiple Airlines
Sat 10/104:25 pm
LIS
- SEA
1 stop29h 20m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$720
This eDestinos deal was found by Cheapflights users on 4/29. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:10 pm
SEA
- LIS
1 stop20h 10m
Turkish Airlines
Tue 10/205:55 am
LIS
- SEA
1 stop19h 20m
Turkish Airlines
Deal found 4/29![Turkish Airlines logo]()
$744
This Justfly.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:30 pm
SEA
- LIS
2 stops41h 35m
Scandinavian Airlines
Mon 11/304:55 pm
LIS
- SEA
2 stops37h 16m
Scandinavian Airlines
Deal found 4/28![Scandinavian Airlines logo]()
$756
This Travelocity deal was found by Cheapflights users on 4/28. 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.
Mon 11/96:50 pm
SEA
- OPO
2 stops17h 10m
Iberia
Mon 11/239:55 pm
OPO
- SEA
2 stops27h 00m
Iberia
Deal found 4/28![Iberia logo]()
$774
This FlightHub deal was found by Cheapflights users on 4/29. 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.
Sat 8/293:55 pm
SEA
- LIS
1 stop33h 05m
Multiple Airlines
Sat 9/54:25 pm
LIS
- SEA
1 stop29h 20m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$778
This British Airways deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:46 pm
SEA
- OPO
2 stops21h 14m
Multiple Airlines
Mon 11/238:40 pm
OPO
- SEA
2 stops33h 35m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$782
This FlightHub deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:10 pm
SEA
- LIS
1 stop36h 30m
Turkish Airlines
Fri 10/1611:00 am
LIS
- SEA
1 stop38h 15m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$784
This FlightHub deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/272:30 pm
SEA
- LIS
2 stops42h 35m
Scandinavian Airlines
Tue 11/104:55 pm
LIS
- SEA
2 stops37h 16m
Scandinavian Airlines
Deal found 4/26![Scandinavian Airlines logo]()
$786
This KAYAK deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:55 pm
SEA
- OPO
1 stop35h 05m
Scandinavian Airlines
Thu 9/311:50 am
OPO
- SEA
1 stop33h 55m
Scandinavian Airlines
Deal found 4/27![Scandinavian Airlines logo]()
$787
This FlightHub deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:10 pm
SEA
- LIS
1 stop20h 10m
Turkish Airlines
Wed 9/165:55 am
LIS
- SEA
1 stop19h 20m
Turkish Airlines
Deal found 4/27![Turkish Airlines logo]()
$788
This oojo deal was found by Cheapflights users on 4/29. 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.
Thu 9/177:10 pm
SEA
- OPO
1 stop30h 35m
Turkish Airlines
Thu 9/2411:00 am
OPO
- SEA
1 stop38h 15m
Turkish Airlines
Deal found 4/29![Turkish Airlines logo]()
$789
This oojo deal was found by Cheapflights users on 4/28. 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.
Mon 9/217:10 pm
SEA
- OPO
1 stop36h 30m
Turkish Airlines
Fri 10/210:40 am
OPO
- SEA
1 stop38h 35m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$790
Best flights from Seattle to PortugalDiscover carefully curated flight deals from Seattle to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
Discover carefully curated flight deals from Seattle to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
This Scandinavian Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 10/207:20 am
SEA
- LIS
2 stops24h 15m
Multiple Airlines
Fri 10/307:05 am
LIS
- SEA
2 stops22h 07m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$848
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1211:53 pm
SEA
- LIS
2 stops26h 52m
Delta
Wed 10/215:00 am
LIS
- SEA
1 stop19h 39m
Delta
Deal found 4/25![Delta logo]()
$883
This Turkish Airlines deal was found by Cheapflights users on 4/28. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:10 pm
SEA
- LIS
1 stop36h 40m
Turkish Airlines
Thu 10/810:50 am
LIS
- SEA
1 stop38h 25m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$891
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 9/175:00 pm
SEA
- OPO
2 stops29h 50m
United Airlines
Thu 9/2411:50 am
OPO
- SEA
3 stops42h 50m
United Airlines
Deal found 4/29![United Airlines logo]()
$899
This KLM deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:15 am
SEA
- OPO
1 stop19h 05m
KLM
Tue 8/254:20 pm
OPO
- SEA
1 stop32h 07m
KLM
Deal found 4/26![KLM logo]()
$947
This Lufthansa deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:50 pm
SEA
- OPO
1 stop20h 35m
Lufthansa
Tue 6/166:20 am
OPO
- SEA
1 stop18h 39m
Lufthansa
Deal found 4/25![Lufthansa logo]()
$1,027
This British Airways deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:10 pm
SEA
- FAO
2 stops18h 40m
British Airways
Mon 10/267:05 pm
FAO
- SEA
1 stop24h 25m
British Airways
Deal found 4/25![British Airways logo]()
$1,072
This Mytrip deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/83:00 pm
SEA
- PDL
3 stops32h 40m
Multiple Airlines
Mon 6/159:35 am
PDL
- SEA
3 stops31h 05m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$918
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:30 pm
SEA
- LIS
2 stops19h 20m
Delta
Wed 10/145:00 am
LIS
- SEA
1 stop14h 52m
Delta
Deal found 4/25![Delta logo]()
$924
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/1010:41 pm
SEA
- OPO
2 stops27h 04m
United Airlines
Sun 5/246:00 am
OPO
- SEA
2 stops22h 53m
United Airlines
Deal found 4/28![United Airlines logo]()
$1,008
This Delta deal was found by Cheapflights users on 4/28. 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 9/2211:25 am
SEA
- LIS
2 stops19h 30m
Delta
Tue 9/295:00 am
LIS
- SEA
1 stop14h 47m
Delta
Deal found 4/28![Delta logo]()
$924
This Scandinavian Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:55 pm
SEA
- LIS
1 stop20h 45m
Multiple Airlines
Thu 10/157:00 am
LIS
- SEA
2 stops23h 12m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$946
This CrystalTravel deal was found by Cheapflights users on 4/29. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/126:50 pm
SEA
- OPO
1 stop20h 35m
Lufthansa
Fri 6/196:20 am
OPO
- SEA
1 stop18h 39m
Lufthansa
Deal found 4/29![Lufthansa logo]()
$1,049
This KLM deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:55 pm
SEA
- FNC
2 stops36h 40m
KLM
Fri 10/27:25 pm
FNC
- SEA
1 stop29h 14m
KLM
Deal found 4/25![KLM logo]()
$1,067
This British Airways deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:20 pm
SEA
- FNC
1 stop32h 00m
British Airways
Sat 10/101:10 pm
FNC
- SEA
1 stop30h 25m
British Airways
Deal found 4/25![British Airways logo]()
$1,125
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/911:00 pm
SEA
- OPO
2 stops24h 00m
United Airlines
Tue 6/1612:15 pm
OPO
- SEA
2 stops31h 23m
United Airlines
Deal found 4/25![United Airlines logo]()
$1,024
This Delta deal was found by Cheapflights users on 4/28. 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 8/257:20 am
SEA
- LIS
2 stops19h 55m
Delta
Wed 9/165:00 am
LIS
- SEA
2 stops22h 00m
Delta
Deal found 4/28![Delta logo]()
$962
This Lufthansa deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:50 pm
SEA
- OPO
1 stop20h 35m
Lufthansa
Thu 6/186:20 am
OPO
- SEA
1 stop18h 39m
Lufthansa
Deal found 4/26![Lufthansa logo]()
$1,086
This Mytrip deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1010:30 am
SEA
- FAO
2 stops25h 55m
Multiple Airlines
Wed 6/176:05 am
FAO
- SEA
3 stops44h 40m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$1,003
This Delta deal was found by Cheapflights users on 4/28. 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 8/247:20 am
SEA
- LIS
2 stops19h 55m
Delta
Wed 9/235:00 am
LIS
- SEA
2 stops22h 33m
Delta
Deal found 4/28![Delta logo]()
$962
This KLM deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:45 pm
SEA
- FAO
1 stop33h 25m
KLM
Mon 5/189:45 pm
FAO
- SEA
1 stop21h 57m
KLM
Deal found 4/27![KLM logo]()
$1,172
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:10 am
SEA
- FAO
2 stops17h 00m
United Airlines
Thu 9/311:40 am
FAO
- SEA
2 stops19h 31m
United Airlines
Deal found 4/24![United Airlines logo]()
$1,084
This British Airways deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/268:59 pm
SEA
- FNC
2 stops54h 31m
British Airways
Wed 10/712:10 pm
FNC
- SEA
1 stop31h 25m
British Airways
Deal found 4/25![British Airways logo]()
$1,235
This Mytrip deal was found by Cheapflights users on 4/29. 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.
Fri 6/127:35 pm
SEA
- OPO
3 stops27h 10m
Multiple Airlines
Fri 6/191:30 pm
OPO
- SEA
2 stops28h 37m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$1,065
This Justfly.com deal was found by Cheapflights users on 4/28. 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.
Sun 8/236:50 pm
SEA
- FAO
1 stop32h 40m
Lufthansa
Mon 8/313:55 pm
FAO
- SEA
1 stop33h 04m
Lufthansa
Deal found 4/28![Lufthansa logo]()
$1,173
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:00 am
SEA
- FAO
2 stops20h 55m
United Airlines
Tue 9/111:40 am
FAO
- SEA
2 stops19h 02m
United Airlines
Deal found 4/24![United Airlines logo]()
$1,084
This KLM deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:45 pm
SEA
- FNC
1 stop31h 30m
KLM
Tue 6/96:30 pm
FNC
- SEA
1 stop29h 54m
KLM
Deal found 4/27![KLM logo]()
$1,287
This Justfly.com deal was found by Cheapflights users on 4/28. 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.
Sun 8/236:50 pm
SEA
- FAO
1 stop32h 40m
Multiple Airlines
Mon 8/319:10 am
FAO
- SEA
2 stops41h 49m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$1,067
This British Airways deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:20 pm
SEA
- FNC
1 stop32h 05m
British Airways
Fri 9/251:10 pm
FNC
- SEA
1 stop30h 25m
British Airways
Deal found 4/25![British Airways logo]()
$1,368
This United Airlines deal was found by Cheapflights users on 4/28. 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 8/2310:47 pm
SEA
- FAO
2 stops26h 23m
United Airlines
Mon 8/3111:40 am
FAO
- SEA
2 stops29h 55m
United Airlines
Deal found 4/28![United Airlines logo]()
$1,144
Last-minute flights from Seattle to PortugalDiscover last-minute flight deals from Seattle to Portugal. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Portugal. Data last updated April 29, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/37:10 pm
SEA
- OPO
1 stop36h 40m
Turkish Airlines
Sun 5/174:40 pm
OPO
- SEA
1 stop32h 35m
Turkish Airlines
Deal found 4/26![Turkish Airlines logo]()
$864
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/37:10 pm
SEA
- OPO
1 stop36h 40m
Turkish Airlines
Mon 5/184:50 pm
OPO
- SEA
1 stop32h 25m
Turkish Airlines
Deal found 4/26![Turkish Airlines logo]()
$872
This oojo deal was found by Cheapflights users on 4/29. 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.
Mon 5/47:10 pm
SEA
- OPO
1 stop30h 35m
Turkish Airlines
Tue 5/1210:40 am
OPO
- SEA
1 stop38h 35m
Turkish Airlines
Deal found 4/29![Turkish Airlines logo]()
$800
This Mytrip deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/43:40 pm
SEA
- LIS
3 stops23h 20m
Multiple Airlines
Tue 5/196:30 am
LIS
- SEA
2 stops20h 15m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$817
This Mytrip deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:00 pm
SEA
- OPO
3 stops29h 00m
Multiple Airlines
Tue 5/1210:25 pm
OPO
- SEA
3 stops43h 15m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$821
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 5/47:10 pm
SEA
- LIS
1 stop36h 30m
Turkish Airlines
Tue 5/195:55 am
LIS
- SEA
1 stop19h 20m
Turkish Airlines
Deal found 4/28![Turkish Airlines logo]()
$831
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:10 pm
SEA
- OPO
1 stop30h 35m
Turkish Airlines
Wed 5/2010:45 am
OPO
- SEA
1 stop38h 30m
Turkish Airlines
Deal found 4/26![Turkish Airlines logo]()
$854
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:20 am
SEA
- OPO
2 stops24h 20m
Multiple Airlines
Wed 5/205:25 pm
OPO
- SEA
1 stop32h 20m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$884
This oojo deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:10 pm
SEA
- OPO
1 stop36h 40m
Turkish Airlines
Sun 5/2410:45 am
OPO
- SEA
1 stop38h 30m
Turkish Airlines
Deal found 4/27![Turkish Airlines logo]()
$885
This oojo deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:10 pm
SEA
- OPO
1 stop36h 30m
Turkish Airlines
Mon 5/186:30 am
OPO
- SEA
1 stop18h 45m
Turkish Airlines
Deal found 4/27![Turkish Airlines logo]()
$865
This Mytrip deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:00 pm
SEA
- LIS
3 stops30h 55m
Multiple Airlines
Tue 6/26:15 am
LIS
- SEA
3 stops35h 25m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$881
This Mytrip deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 pm
SEA
- OPO
3 stops34h 05m
Multiple Airlines
Sun 6/74:50 pm
OPO
- SEA
3 stops35h 50m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$871
One-way flights from Seattle to PortugalSearch for one-way flight options from Seattle to Portugal. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
Search for one-way flight options from Seattle to Portugal. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:00 pm
SEA
- OPO
3 stops59h 45m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:00 pm
SEA
- OPO
3 stops41h 05m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:00 pm
SEA
- LIS
3 stops36h 10m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:00 pm
SEA
- OPO
2 stops36h 40m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:00 pm
SEA
- LIS
3 stops43h 05m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 10/113:40 pm
SEA
- OPO
2 stops40h 00m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 10/93:40 pm
SEA
- OPO
2 stops23h 45m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:00 pm
SEA
- LIS
3 stops40h 50m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/33:40 pm
SEA
- FAO
3 stops44h 40m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:00 pm
SEA
- OPO
3 stops29h 45m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 8/317:00 pm
SEA
- OPO
3 stops36h 00m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 8/243:40 pm
SEA
- OPO
3 stops45h 10m
Multiple Airlines
Deal found 4/28![Multiple Airlines logo]()
$346
Find flight deals from Seattle to Portugal
Keep the following information in mind while searching for Seattle to Portugal flight deals. Data was last updated April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $720 (Gotogate) |
One-way from | $298 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $708 |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Portugal 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 April 29, 2026.
Use the filters below to find and compare flights from Seattle to Portugal that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Tue 10/20
7:20 am-3:35 pm
2 stops24h 15m
Lisbon Humberto Delgado
Fri 10/30
7:05 am-10:12 pm
2 stops22h 07m
$848
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Mon 10/12
11:53 pm-10:45 am
2 stops26h 52m
Lisbon Humberto Delgado
Wed 10/21
5:00 am-4:39 pm
1 stop19h 39m
$883
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Fri 9/25
7:10 pm-3:50 pm
1 stop36h 40m
Lisbon Humberto Delgado
Thu 10/8
10:50 am-5:15 pm
1 stop38h 25m
$891
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
Thu 9/17
5:00 pm-6:50 am
2 stops29h 50m
Porto
Thu 9/24
11:50 am-10:40 pm
3 stops42h 50m
$899
SeattlePonta Delgada
SEA - PDL
SEAPDL
Seattle/Tacoma Intl
Mon 6/8
3:00 pm-6:40 am
3 stops32h 40m
Ponta Delgada Nordela
Mon 6/15
9:35 am-9:40 am
3 stops31h 05m
$918
Quickest round-trip
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Wed 10/7
2:30 pm-5:50 pm
2 stops19h 20m
Lisbon Humberto Delgado
Wed 10/14
5:00 am-11:52 am
1 stop14h 52m
$924
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Tue 9/22
11:25 am-2:55 pm
2 stops19h 30m
Lisbon Humberto Delgado
Tue 9/29
5:00 am-11:47 am
1 stop14h 47m
$924
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Fri 10/2
3:55 pm-8:40 pm
1 stop20h 45m
Lisbon Humberto Delgado
Thu 10/15
7:00 am-10:12 pm
2 stops23h 12m
$946
SeattlePorto
SEA - OPO
SEAOPO
Seattle/Tacoma Intl
Sat 8/8
7:15 am-10:20 am
1 stop19h 05m
Porto
Tue 8/25
4:20 pm-4:27 pm
1 stop32h 07m
$947
SeattleLisbon
SEA - LIS
SEALIS
Seattle/Tacoma Intl
Tue 8/25
7:20 am-11:15 am
2 stops19h 55m
Lisbon Humberto Delgado
Wed 9/16
5:00 am-7:00 pm
2 stops22h 00m
$962
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Seattle to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Seattle with our price prediction graph.
SEA-OPO
SEA-LIS
SEA-FAO
SEA-FNC
SEA-PDL
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 Seattle to Portugal
SEA-PT0
SEA-OPO
SEA-LIS
SEA-FAO
SEA-FNC
How far ahead should I book a flight from Seattle to Portugal?
To ensure you get the cheapest price possible for a flight from Seattle to Portugal, you should look to book at least 80 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 Seattle to Portugal?
Currently, January is the cheapest month in which you can book a flight from Seattle to Portugal (average of $339). Flying from Seattle to Portugal in June is currently the most expensive (average of $744). 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.
Reviews of airlines servicing Portugal
Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated April 29, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andIcelandair from Seattle to Portugal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Boarding
8.1
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Boarding
8.1
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Boarding
8.1
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Boarding
8.1
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Boarding
8.1
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Boarding
8.1
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Seattle to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Seattle to Portugal
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Portugal by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Portugal by cabin class
Find flights from Seattle to Portugal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Portugal flights
Browse other Seattle and Portugal flight options. Last updated on April 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to Portugal flights
Consider these flights traveling from Seattle to Portugal.
Fly to Portugal regions
Consider these flights traveling to Portugal regions.
Top 10 airlines flying from Seattle to Portugal
Discover the top 10 airlines that operate flights from Seattle to Portugal. 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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$348 | Average$471 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$481 | Average$807 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$482 | Average$1,017 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$482 | Average$830 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$494 | Average$1,175 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$530 | Average$1,083 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$543 | Average$935 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$545 | Average$955 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$553 | Average$968 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$558 | Average$1,042 | FlexibilityNo cancel fee | On-time71% |