$293+ Cheap flights from Seattle (SEA) to Portugal
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Nov 29 — Dec 61
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Portugal with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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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 October 30, 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 October 30, 2026.
This Gotogate deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/232:35 pm -
1 stop14h 10m
Tue 12/81:55 pm -
1 stop35h 05m
Deal found 10/29![Icelandair logo]()
$634
This Mytrip deal was found by Cheapflights users on 10/26. 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 12/17:45 am -
2 stops24h 20m
Tue 12/86:25 pm -
2 stops26h 35m
Deal found 10/26![Multiple Airlines logo]()
$665
This Trip.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/92:35 pm -
1 stop14h 15m
Tue 12/151:55 pm -
1 stop35h 05m
Deal found 10/30![Icelandair logo]()
$667
This Icelandair deal was found by Cheapflights users on 10/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/302:35 pm -
1 stop14h 10m
Tue 12/81:55 pm -
1 stop35h 05m
Deal found 10/29![Icelandair logo]()
$674
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Mon 11/302:35 pm -
1 stop14h 10m
Sun 12/62:00 pm -
1 stop35h 00m
Deal found 10/29![Icelandair logo]()
$702
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Tue 12/88:40 am -
3 stops23h 25m
Tue 12/156:25 pm -
2 stops26h 35m
Deal found 10/29![Multiple Airlines logo]()
$703
This Icelandair deal was found by Cheapflights users on 10/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/282:35 pm -
1 stop14h 15m
Tue 12/81:55 pm -
1 stop35h 05m
Deal found 10/29![Icelandair logo]()
$724
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Tue 12/17:45 am -
2 stops24h 00m
Mon 12/76:45 pm -
3 stops31h 37m
Deal found 10/29![Multiple Airlines logo]()
$728
This Gotogate deal was found by Cheapflights users on 10/25. 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.
Wed 12/22:50 pm -
1 stop14h 40m
Wed 12/95:00 am -
1 stop15h 00m
Deal found 10/25![Lufthansa logo]()
$749
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/303:25 pm -
1 stop22h 35m
Wed 1/205:00 am -
1 stop14h 49m
Deal found 10/26![Delta logo]()
$780
This Delta deal was found by Cheapflights users on 10/28. 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 12/76:00 am -
2 stops20h 35m
Wed 12/235:55 am -
1 stop17h 20m
Deal found 10/28![Delta logo]()
$791
This KLM deal was found by Cheapflights users on 10/26. 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.
Mon 11/307:27 am -
2 stops19h 03m
Wed 1/205:00 am -
2 stops17h 50m
Deal found 10/26![KLM logo]()
$798
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 October 30, 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 October 30, 2026.
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Sat 4/247:32 pm -
3 stops30h 13m
Fri 4/306:00 am -
1 stop14h 20m
Deal found 10/25![United Airlines logo]()
$721
This KLM deal was found by Cheapflights users on 10/27. 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.
Mon 4/191:30 pm -
1 stop17h 55m
Wed 4/285:00 am -
1 stop14h 33m
Deal found 10/27![KLM logo]()
$722
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/201:30 pm -
1 stop17h 55m
Wed 4/285:00 am -
1 stop14h 33m
Deal found 10/27![Delta logo]()
$722
This Expedia deal was found by Cheapflights users on 10/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/111:50 pm -
1 stop17h 20m
Mon 3/1512:05 pm -
2 stops42h 16m
Deal found 10/25![Multiple Airlines logo]()
$762
This British Airways deal was found by Cheapflights users on 10/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/156:45 pm -
1 stop16h 05m
Mon 2/2212:55 pm -
1 stop35h 55m
Deal found 10/26![British Airways logo]()
$821
This Icelandair deal was found by Cheapflights users on 10/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/32:35 pm -
2 stops18h 35m
Sun 3/711:10 am -
2 stops37h 50m
Deal found 10/29![Icelandair logo]()
$1,379
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/192:30 pm -
2 stops23h 30m
Wed 4/285:00 am -
1 stop19h 20m
Deal found 10/26![Delta logo]()
$726
This United Airlines deal was found by Cheapflights users on 10/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/177:32 pm -
3 stops30h 13m
Wed 4/286:00 am -
1 stop14h 20m
Deal found 10/26![United Airlines logo]()
$732
This FlightHub deal was found by Cheapflights users on 10/28. 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.
Wed 4/216:50 am -
2 stops43h 55m
Mon 5/33:50 pm -
2 stops36h 15m
Deal found 10/28![TAP AIR PORTUGAL logo]()
$1,579
This oojo deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:00 am -
2 stops21h 35m
Mon 11/304:30 pm -
3 stops36h 31m
Deal found 10/30![Lufthansa logo]()
$1,596
This Turkish Airlines deal was found by Cheapflights users on 10/29. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/77:05 pm -
2 stops36h 35m
Fri 12/1111:10 am -
2 stops38h 00m
Deal found 10/29![Turkish Airlines logo]()
$1,622
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/111:30 pm -
1 stop17h 55m
Wed 4/215:55 am -
2 stops24h 07m
Deal found 10/29![Delta logo]()
$739
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2011:59 pm -
2 stops26h 36m
Tue 12/2911:15 am -
2 stops20h 27m
Deal found 10/25![Aer Lingus logo]()
$1,645
This British Airways deal was found by Cheapflights users on 10/25. 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.
Mon 11/236:45 pm -
1 stop36h 40m
Mon 12/75:15 pm -
1 stop26h 10m
Deal found 10/25![British Airways logo]()
$842
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Wed 1/278:30 am -
2 stops15h 40m
Wed 2/311:20 am -
3 stops41h 42m
Deal found 10/25![United Airlines logo]()
$799
This KLM deal was found by Cheapflights users on 10/25. 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.
Sat 4/175:40 pm -
1 stop16h 15m
Mon 4/2610:30 am -
1 stop33h 03m
Deal found 10/25![KLM logo]()
$882
This KLM deal was found by Cheapflights users on 10/26. 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.
Thu 4/89:55 pm -
2 stops36h 45m
Fri 4/1610:25 am -
2 stops32h 10m
Deal found 10/26![KLM logo]()
$897
This United Airlines deal was found by Cheapflights users on 10/25. 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 4/138:00 am -
1 stop18h 30m
Thu 4/225:05 am -
1 stop15h 15m
Deal found 10/25![United Airlines logo]()
$832
This Delta deal was found by Cheapflights users on 10/25. 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 4/125:45 am -
2 stops25h 10m
Mon 4/1911:55 am -
1 stop36h 25m
Deal found 10/25![Delta logo]()
$842
This British Airways deal was found by Cheapflights users on 10/28. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:45 pm -
1 stop32h 55m
Mon 11/2312:30 pm -
1 stop36h 20m
Deal found 10/28![British Airways logo]()
$942
This Mytrip deal was found by Cheapflights users on 10/25. 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 12/72:35 pm -
2 stops20h 40m
Wed 12/236:50 pm -
3 stops30h 10m
Deal found 10/25![Multiple Airlines logo]()
$1,065
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/108:30 am -
3 stops38h 25m
Wed 11/185:00 am -
1 stop15h 00m
Deal found 10/27![United Airlines logo]()
$840
This Delta deal was found by Cheapflights users on 10/28. 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.
Sun 2/146:00 am -
2 stops27h 30m
Fri 2/195:00 am -
1 stop14h 47m
Deal found 10/28![Delta logo]()
$842
This KLM deal was found by Cheapflights users on 10/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/132:35 pm -
1 stop15h 15m
Sun 12/207:30 pm -
1 stop24h 20m
Deal found 10/29![KLM logo]()
$950
This KAYAK deal was found by Cheapflights users on 10/27. 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.
Sun 3/283:35 pm -
2 stops39h 05m
Fri 4/96:05 pm -
1 stop23h 25m
Deal found 10/27![Multiple Airlines logo]()
$1,111
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/117:00 am -
2 stops18h 20m
Fri 12/186:00 am -
1 stop15h 00m
Deal found 10/27![United Airlines logo]()
$842
This FlightHub deal was found by Cheapflights users on 10/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/316:45 pm -
1 stop37h 20m
Sat 1/164:55 pm -
1 stop31h 55m
Deal found 10/25![British Airways logo]()
$1,021
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/612:08 pm -
2 stops21h 22m
Sat 1/165:00 am -
1 stop14h 49m
Deal found 10/26![Delta logo]()
$847
This KLM deal was found by Cheapflights users on 10/27. 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.
Thu 12/102:35 pm -
1 stop15h 15m
Thu 12/248:15 pm -
1 stop23h 35m
Deal found 10/27![KLM logo]()
$951
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Mon 2/18:30 am -
2 stops15h 40m
Sat 2/1311:20 am -
3 stops41h 07m
Deal found 10/29![United Airlines logo]()
$849
Last-minute flights from Seattle to PortugalDiscover last-minute flight deals from Seattle to Portugal. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Portugal. Data last updated October 30, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/232:35 pm -
1 stop14h 10m
Tue 12/81:55 pm -
1 stop35h 05m
Deal found 10/29![Icelandair logo]()
$634
This Icelandair deal was found by Cheapflights users on 10/26. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/232:35 pm -
1 stop14h 10m
Sun 12/62:00 pm -
1 stop35h 00m
Deal found 10/26![Icelandair logo]()
$763
This Gotogate deal was found by Cheapflights users on 10/25. 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.
Mon 11/2310:10 am -
2 stops16h 30m
Tue 12/86:05 am -
2 stops20h 17m
Deal found 10/25![Multiple Airlines logo]()
$767
This Mytrip deal was found by Cheapflights users on 10/26. 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 11/252:50 pm -
3 stops33h 25m
Wed 12/24:55 pm -
2 stops27h 05m
Deal found 10/26![Multiple Airlines logo]()
$777
This Justfly.com deal was found by Cheapflights users on 10/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:50 pm -
1 stop24h 40m
Wed 12/912:35 pm -
2 stops43h 09m
Deal found 10/26![Multiple Airlines logo]()
$783
This Icelandair deal was found by Cheapflights users on 10/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/282:35 pm -
1 stop14h 15m
Tue 12/81:55 pm -
1 stop35h 05m
Deal found 10/29![Icelandair logo]()
$724
This FlightHub deal was found by Cheapflights users on 10/29. 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 11/282:35 pm -
1 stop14h 15m
Sun 12/62:00 pm -
1 stop35h 00m
Deal found 10/29![Icelandair logo]()
$752
This Air Canada deal was found by Cheapflights users on 10/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2910:10 am -
2 stops40h 30m
Wed 12/95:00 am -
2 stops17h 37m
Deal found 10/29![Air Canada logo]()
$785
This Icelandair deal was found by Cheapflights users on 10/29. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/302:35 pm -
1 stop14h 10m
Tue 12/81:55 pm -
1 stop35h 05m
Deal found 10/29![Icelandair logo]()
$674
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Mon 11/302:35 pm -
1 stop14h 10m
Sun 12/62:00 pm -
1 stop35h 00m
Deal found 10/29![Icelandair logo]()
$702
This Delta deal was found by Cheapflights users on 10/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/303:25 pm -
1 stop22h 35m
Wed 1/205:00 am -
1 stop14h 49m
Deal found 10/26![Delta logo]()
$780
This KLM deal was found by Cheapflights users on 10/26. 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.
Mon 11/307:27 am -
2 stops19h 03m
Wed 1/205:00 am -
2 stops17h 50m
Deal found 10/26![KLM logo]()
$798
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 October 30, 2026.
Search for one-way flight options from Seattle to Portugal. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/292:35 pm -
2 stops20h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Sun 11/152:35 pm -
3 stops47h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 11/237:38 am -
1 stop20h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Wed 11/252:35 pm -
3 stops46h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$312
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Wed 2/242:35 pm -
2 stops22h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Tue 2/232:35 pm -
2 stops25h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/302:35 pm -
3 stops38h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 2/222:35 pm -
2 stops24h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 2/152:35 pm -
2 stops19h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Tue 12/12:35 pm -
3 stops45h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$330
This Expedia deal was found by Cheapflights users on 10/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/146:50 pm -
1 stop20h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Lufthansa logo]()
$331
This KLM deal was found by Cheapflights users on 10/26. 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.
Mon 4/191:30 pm -
1 stop17h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![KLM logo]()
$333
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 October 30, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $634 (Gotogate) |
One-way from | $293 (Mytrip) |
Popular in | June |
Cheapest in | January |
Average price | $922 |
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 7,457,451 searches. Data last updated October 30, 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
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Mon 4/19
1:30 pm-3:25 pm
1 stop17h 55m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$333
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Mon 4/26
6:35 pm-10:00 pm
1 stop19h 25m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$333
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Mon 4/26
6:35 pm-10:00 pm
1 stop19h 25m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$338
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Sat 4/17
11:50 pm-9:45 am
2 stops25h 55m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$339
SeattleLisbon
SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado
SEALIS
Seattle/Tacoma Intl
Thu 11/26
4:50 pm-2:20 pm
1 stop37h 30m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$355
SeattleLisbon
SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado
SEALIS
Seattle/Tacoma Intl
Sun 1/10
2:35 pm-4:20 pm
2 stops17h 45m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$360
SeattleLisbon
SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado
SEALIS
Seattle/Tacoma Intl
Sun 1/31
2:35 pm-11:25 pm
3 stops24h 50m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$363
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Mon 4/26
7:32 pm-9:45 am
3 stops54h 13m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$367
SeattleLisbon
SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado
SEALIS
Seattle/Tacoma Intl
Thu 2/25
2:35 pm-7:00 pm
2 stops20h 25m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$375
SeattleLisbon
SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado
SEALIS
Seattle/Tacoma Intl
Mon 2/1
6:45 pm-6:50 pm
1 stop16h 05m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$376
Showing 1-10 of 54 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-LIS
SEA-OPO
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-LIS
SEA-OPO
SEA-FAO
SEA-FNC
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 $496). Flying from Seattle to Portugal in June is currently the most expensive (average of $1,209). 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 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 79 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.
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 October 30, 2026.
Get a feel of what it's like to fly with KLM,Delta, andUnited Airlines 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.
Comfort
7.7
Food
7.4
Entertainment
7.2
Boarding
7.8
Overall
7.8
Crew
8.4
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
Comfort
7.7
Food
7.4
Entertainment
7.2
Boarding
7.8
Overall
7.8
Crew
8.4
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
Comfort
7.7
Food
7.4
Entertainment
7.2
Boarding
7.8
Overall
7.8
Crew
8.4
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
Comfort
7.7
Food
7.4
Entertainment
7.2
Boarding
7.8
Overall
7.8
Crew
8.4
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
Comfort
7.7
Food
7.4
Entertainment
7.2
Boarding
7.8
Overall
7.8
Crew
8.4
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - ATL
Comfort
7.7
Food
7.4
Entertainment
7.2
Boarding
7.8
Overall
7.8
Crew
8.4
Reviews
1 / 20
8.0
ExcellentMeghana,Aug 2026
QRO - 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.
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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 October 30, 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 7,457,451 searches. Data last updated October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$372 | Average$506 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$462 | Average$1,042 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$481 | Average$882 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$482 | Average$1,011 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$482 | Average$890 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$504 | Average$954 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$559 | Average$1,027 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$567 | Average$706 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$649 | Average$980 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$660 | Average$975 | FlexibilityNo cancel fee | On-time67% |