$364+ Cheap flights from Portugal to Seattle (SEA)
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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
Jun 20 — Jun 271
Round-trip
1 adult, Economy
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Find cheap flights from Portugal to Seattle with Cheapflights
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Cheapest flights from Portugal to SeattleExplore the most affordable flight options available from Portugal to Seattle. 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 Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 21, 2026.
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/610:15 pm
LIS
- SEA
1 stop26h 55m
Aer Lingus
Mon 6/227:10 pm
SEA
- LIS
1 stop18h 25m
Aer Lingus
Deal found 5/21![Aer Lingus logo]()
$753
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.
Sat 6/1310:15 pm
LIS
- SEA
1 stop26h 55m
Aer Lingus
Mon 6/297:10 pm
SEA
- LIS
1 stop18h 25m
Aer Lingus
Deal found 5/18![Aer Lingus logo]()
$788
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:15 am
LIS
- SEA
3 stops35h 52m
Multiple Airlines
Thu 8/67:35 pm
SEA
- LIS
3 stops19h 00m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$855
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:15 am
LIS
- SEA
2 stops35h 25m
WestJet
Thu 8/67:35 pm
SEA
- LIS
3 stops19h 00m
WestJet
Deal found 5/20![WestJet logo]()
$859
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/136:10 am
LIS
- SEA
2 stops35h 30m
Multiple Airlines
Mon 6/2910:30 am
SEA
- LIS
3 stops36h 00m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$870
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.
Sun 6/286:10 am
LIS
- SEA
2 stops35h 30m
Multiple Airlines
Sun 9/137:10 pm
SEA
- LIS
1 stop18h 55m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$875
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:35 pm
LIS
- SEA
3 stops33h 45m
Multiple Airlines
Thu 12/32:35 pm
SEA
- LIS
3 stops24h 20m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$888
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.
Sun 6/286:10 am
LIS
- SEA
2 stops35h 30m
Multiple Airlines
Tue 9/157:10 pm
SEA
- LIS
1 stop17h 35m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$893
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.
Sun 6/286:10 am
LIS
- SEA
2 stops35h 30m
Multiple Airlines
Mon 9/147:10 pm
SEA
- LIS
1 stop15h 45m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$894
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 am
OPO
- SEA
2 stops36h 05m
Air Canada
Sun 6/710:45 am
SEA
- OPO
2 stops23h 30m
Air Canada
Deal found 5/20![Air Canada logo]()
$981
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 am
OPO
- SEA
2 stops22h 53m
United Airlines
Sun 6/77:35 am
SEA
- OPO
1 stop15h 20m
United Airlines
Deal found 5/20![United Airlines logo]()
$986
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
- SEA
2 stops21h 36m
United Airlines
Fri 6/1211:57 pm
SEA
- OPO
2 stops22h 58m
United Airlines
Deal found 5/18![United Airlines logo]()
$987
Best flights from Portugal to SeattleDiscover carefully curated flight deals from Portugal to Seattle 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 Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 21, 2026.
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 am
OPO
- SEA
2 stops36h 05m
Air Canada
Sun 6/710:45 am
SEA
- OPO
2 stops23h 30m
Air Canada
Deal found 5/20![Air Canada logo]()
$981
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 am
OPO
- SEA
2 stops22h 53m
United Airlines
Sun 6/77:35 am
SEA
- OPO
1 stop15h 20m
United Airlines
Deal found 5/20![United Airlines logo]()
$986
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.
Fri 6/55:00 am
OPO
- SEA
1 stop14h 37m
Delta
Fri 6/125:45 pm
SEA
- OPO
1 stop13h 45m
Delta
Deal found 5/18![Delta logo]()
$992
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:05 am
LIS
- SEA
1 stop15h 15m
Lufthansa
Thu 6/116:50 pm
SEA
- LIS
1 stop19h 55m
Lufthansa
Deal found 5/17![Lufthansa logo]()
$993
This Turkish 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/185:55 am
LIS
- SEA
1 stop19h 25m
Turkish Airlines
Sat 7/117:15 pm
SEA
- LIS
1 stop20h 05m
Turkish Airlines
Deal found 5/17![Turkish Airlines logo]()
$1,042
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.
Fri 6/54:20 pm
OPO
- SEA
1 stop27h 17m
KLM
Fri 6/121:30 pm
SEA
- OPO
1 stop17h 55m
KLM
Deal found 5/20![KLM logo]()
$1,063
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1810:55 am
LIS
- SEA
1 stop14h 15m
Multiple Airlines
Sun 10/187:10 pm
SEA
- LIS
2 stops17h 55m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$1,066
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/67:10 am
LIS
- SEA
2 stops21h 29m
British Airways
Mon 6/223:05 pm
SEA
- LIS
2 stops18h 50m
British Airways
Deal found 5/21![British Airways logo]()
$1,083
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:00 am
LIS
- SEA
1 stop15h 10m
United Airlines
Thu 11/127:00 am
SEA
- LIS
2 stops17h 10m
United Airlines
Deal found 5/16![United Airlines logo]()
$990
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/115:00 am
LIS
- SEA
1 stop15h 00m
Lufthansa
Thu 12/32:00 pm
SEA
- LIS
1 stop16h 55m
Lufthansa
Deal found 5/20![Lufthansa logo]()
$994
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:00 am
LIS
- SEA
1 stop14h 37m
Delta
Mon 6/156:50 pm
SEA
- LIS
1 stop15h 00m
Delta
Deal found 5/17![Delta logo]()
$995
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:15 pm
OPO
- SEA
2 stops18h 33m
Air Canada
Fri 8/285:45 am
SEA
- OPO
2 stops17h 15m
Air Canada
Deal found 5/21![Air Canada logo]()
$1,168
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.
Mon 6/85:05 am
LIS
- SEA
1 stop15h 15m
United Airlines
Sat 6/131:00 pm
SEA
- LIS
1 stop13h 35m
United Airlines
Deal found 5/17![United Airlines logo]()
$1,082
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.
Mon 6/810:25 am
LIS
- SEA
2 stops18h 21m
United Airlines
Thu 6/112:10 pm
SEA
- LIS
1 stop17h 15m
United Airlines
Deal found 5/17![United Airlines logo]()
$1,120
Last-minute flights from Portugal to SeattleDiscover last-minute flight deals from Portugal to Seattle. Data last updated May 21, 2026 and is based on user searches.
Discover last-minute flight deals from Portugal to Seattle. Data last updated May 21, 2026 and is based on user searches.
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.
Fri 5/294:20 pm
OPO
- SEA
1 stop27h 22m
Multiple Airlines
Mon 6/156:50 pm
SEA
- OPO
1 stop19h 25m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$988
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 am
OPO
- SEA
2 stops36h 05m
Air Canada
Sun 6/710:45 am
SEA
- OPO
2 stops23h 30m
Air Canada
Deal found 5/20![Air Canada logo]()
$981
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 am
OPO
- SEA
2 stops22h 53m
United Airlines
Sun 6/77:35 am
SEA
- OPO
1 stop15h 20m
United Airlines
Deal found 5/20![United Airlines logo]()
$986
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
- SEA
2 stops21h 36m
United Airlines
Fri 6/1211:57 pm
SEA
- OPO
2 stops22h 58m
United Airlines
Deal found 5/18![United Airlines logo]()
$987
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/610:15 pm
LIS
- SEA
1 stop26h 55m
Aer Lingus
Mon 6/227:10 pm
SEA
- LIS
1 stop18h 25m
Aer Lingus
Deal found 5/21![Aer Lingus logo]()
$753
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.
Sat 6/1310:15 pm
LIS
- SEA
1 stop26h 55m
Aer Lingus
Mon 6/297:10 pm
SEA
- LIS
1 stop18h 25m
Aer Lingus
Deal found 5/18![Aer Lingus logo]()
$788
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/136:10 am
LIS
- SEA
2 stops35h 30m
Multiple Airlines
Mon 6/2910:30 am
SEA
- LIS
3 stops36h 00m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$870
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.
Thu 6/186:10 am
LIS
- SEA
2 stops22h 50m
Multiple Airlines
Mon 7/137:10 pm
SEA
- LIS
1 stop18h 25m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$901
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.
Sat 6/206:10 am
LIS
- SEA
2 stops22h 50m
Multiple Airlines
Mon 7/137:10 pm
SEA
- LIS
1 stop18h 25m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$916
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.
Sun 6/286:10 am
LIS
- SEA
2 stops35h 30m
Multiple Airlines
Sun 9/137:10 pm
SEA
- LIS
1 stop18h 55m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$875
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.
Sun 6/286:10 am
LIS
- SEA
2 stops35h 30m
Multiple Airlines
Tue 9/157:10 pm
SEA
- LIS
1 stop17h 35m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$893
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.
Sun 6/286:10 am
LIS
- SEA
2 stops35h 30m
Multiple Airlines
Mon 9/147:10 pm
SEA
- LIS
1 stop15h 45m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$894
One-way flights from Portugal to SeattleSearch for one-way flight options from Portugal to Seattle. Find affordable one-way fares based on user searches. Data last updated May 21, 2026.
Search for one-way flight options from Portugal to Seattle. Find affordable one-way fares based on user searches. Data last updated May 21, 2026.
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/196:10 am
LIS
- SEA
2 stops35h 30m
WestJet
Deal found 5/21![WestJet logo]()
$364
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:10 am
LIS
- SEA
3 stops35h 30m
WestJet
Deal found 5/21![WestJet logo]()
$381
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:10 am
LIS
- SEA
3 stops22h 50m
WestJet
Deal found 5/17![WestJet logo]()
$392
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:15 am
LIS
- SEA
3 stops22h 45m
WestJet
Deal found 5/17![WestJet logo]()
$393
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/169:35 am
LIS
- SEA
3 stops56h 05m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$405
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.
Sat 9/56:10 am
LIS
- SEA
2 stops22h 50m
WestJet
Deal found 5/20![WestJet logo]()
$413
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 7/66:15 am
LIS
- SEA
3 stops44h 30m
WestJet
Deal found 5/20![WestJet logo]()
$414
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/286:10 am
LIS
- SEA
3 stops35h 30m
WestJet
Deal found 5/17![WestJet logo]()
$421
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.
Sun 9/202:10 pm
OPO
- SEA
3 stops54h 50m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$458
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/199:45 pm
OPO
- SEA
3 stops43h 55m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$465
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 6/156:45 am
OPO
- SEA
3 stops46h 15m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$468
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 6/1610:25 pm
OPO
- SEA
3 stops43h 15m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$474
Find flight deals from Portugal to Seattle
Keep the following information in mind while searching for Portugal to Seattle flight deals. Data was last updated May 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $753 (Expedia) |
One-way from | $364 (Trip.com) |
Popular in | January |
Cheapest in | February |
Average price | $975 |
Cheapflights Fare Finder
Customize your flight search to find flights from Portugal to Seattle 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 Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortoSeattle
OPO - SEA
OPOSEA
Porto
Fri 6/5
6:00 am-10:05 am
2 stops36h 05m
Seattle/Tacoma Intl
Sun 6/7
10:45 am-6:15 pm
2 stops23h 30m
$981
PortoSeattle
OPO - SEA
OPOSEA
Porto
Fri 6/5
6:00 am-8:53 pm
2 stops22h 53m
Seattle/Tacoma Intl
Sun 6/7
7:35 am-6:55 am
1 stop15h 20m
$986
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Thu 11/5
5:00 am-12:10 pm
1 stop15h 10m
Seattle/Tacoma Intl
Thu 11/12
7:00 am-8:10 am
2 stops17h 10m
$990
Quickest round-trip
PortoSeattle
OPO - SEA
OPOSEA
Porto
Fri 6/5
5:00 am-11:37 am
1 stop14h 37m
Seattle/Tacoma Intl
Fri 6/12
5:45 pm-3:30 pm
1 stop13h 45m
$992
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Sat 6/6
5:05 am-12:20 pm
1 stop15h 15m
Seattle/Tacoma Intl
Thu 6/11
6:50 pm-10:45 pm
1 stop19h 55m
$993
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Wed 11/11
5:00 am-12:00 pm
1 stop15h 00m
Seattle/Tacoma Intl
Thu 12/3
2:00 pm-2:55 pm
1 stop16h 55m
$994
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Sat 6/6
5:00 am-11:37 am
1 stop14h 37m
Seattle/Tacoma Intl
Mon 6/15
6:50 pm-5:50 pm
1 stop15h 00m
$995
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Thu 6/18
5:55 am-5:20 pm
1 stop19h 25m
Seattle/Tacoma Intl
Sat 7/11
7:15 pm-11:20 pm
1 stop20h 05m
$1,042
PortoSeattle
OPO - SEA
OPOSEA
Porto
Fri 6/5
4:20 pm-11:37 am
1 stop27h 17m
Seattle/Tacoma Intl
Fri 6/12
1:30 pm-3:25 pm
1 stop17h 55m
$1,063
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Sun 10/18
10:55 am-5:10 pm
1 stop14h 15m
Seattle/Tacoma Intl
Sun 10/18
7:10 pm-9:05 pm
2 stops17h 55m
$1,066
Showing 1-10 of 34 resultsSorted by cheapest first
Best time to book a flight from Portugal to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Portugal with our price prediction graph.
LIS-SEA
OPO-SEA
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 Seattle
PT0-SEA
LIS-SEA
OPO-SEA
What is the cheapest month to book a flight from Portugal to Seattle?
Currently, September is the cheapest month in which you can book a flight from Portugal to Seattle (average of $553). Flying from Portugal to Seattle in July is currently the most expensive (average of $1,040). 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 often are flights from Portugal to Seattle delayed?
About 50% of weekly flights between Portugal and Seattle have experienced delays in the past year, with the average delay time being 108 minutes.
What is the most punctual flight time for Portugal to Seattle flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday 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.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated May 21, 2026.
Read reviews from past customers who have flown Delta from Portugal to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Comfort
7.8
Crew
8.5
Entertainment
7.8
Overall
7.9
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Food
7.2
Comfort
7.8
Crew
8.5
Entertainment
7.8
Overall
7.9
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Related info for your journey
Find useful and relevant information for your journey from Portugal to Seattle. 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 Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Tacoma
Ocean Shores
Olympia
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Marysville
Shoreline
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Portugal and Seattle flights
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Other flights to Seattle
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Portugal to Seattle flights
Consider these flights traveling from Portugal to Seattle.
Top airline flying from Portugal to Seattle
Discover the top airline that operate flights from Portugal to Seattle. 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$1,019 | Average$1,112 | FlexibilityNo cancel fee | On-timeN/A |