$277+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
Oct 13 — Oct 201
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 September 13, 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 September 13, 2026.
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/135:50 am -
2 stops17h 10m
Thu 10/228:40 am -
2 stops17h 52m
Deal found 9/10![Multiple Airlines logo]()
$586
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1210:59 pm -
1 stop27h 31m
Thu 11/510:15 am -
1 stop17h 54m
Deal found 9/12![Delta logo]()
$613
This Expedia deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” 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.
Mon 10/266:12 am -
2 stops26h 48m
Mon 11/29:55 pm -
2 stops26h 55m
Deal found 9/11![Iberia logo]()
$621
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:40 pm -
1 stop19h 20m
Fri 11/65:55 am -
1 stop17h 19m
Deal found 9/12![Delta logo]()
$624
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1111:50 am -
1 stop14h 35m
Thu 11/510:15 am -
1 stop17h 54m
Deal found 9/12![Delta logo]()
$625
This KAYAK deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:50 pm -
1 stop20h 35m
Fri 11/66:15 am -
1 stop14h 45m
Deal found 9/12![Lufthansa logo]()
$627
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am -
1 stop20h 00m
Tue 11/36:00 am -
2 stops35h 47m
Deal found 9/12![United Airlines logo]()
$628
This KLM deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:15 am -
1 stop19h 10m
Wed 11/45:55 am -
1 stop17h 19m
Deal found 9/12![Multiple Airlines logo]()
$629
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:59 pm -
1 stop27h 26m
Thu 11/510:15 am -
1 stop17h 54m
Deal found 9/12![Delta logo]()
$633
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:40 pm -
1 stop19h 25m
Wed 11/45:55 am -
2 stops20h 40m
Deal found 9/12![Delta logo]()
$634
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” 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 9/229:40 am -
2 stops21h 15m
Fri 10/25:35 am -
1 stop13h 40m
Deal found 9/9![Delta logo]()
$730
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” 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 11/203:45 pm -
1 stop33h 15m
Thu 12/310:40 am -
1 stop20h 13m
Deal found 9/11![Delta logo]()
$731
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 September 13, 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 September 13, 2026.
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/117:20 am -
2 stops19h 15m
Mon 1/256:25 am -
1 stop16h 48m
Deal found 9/12![Delta logo]()
$683
This British Airways deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” 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 10/53:14 pm -
2 stops20h 51m
Thu 10/227:55 pm -
1 stop23h 40m
Deal found 9/9![British Airways logo]()
$688
This United deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2111:17 pm -
1 stop26h 13m
Sun 11/296:15 am -
1 stop14h 45m
Deal found 9/11![Multiple Airlines logo]()
$717
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am -
1 stop18h 40m
Wed 11/115:00 am -
1 stop15h 00m
Deal found 9/8![United Airlines logo]()
$744
This KLM deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/49:50 am -
2 stops23h 20m
Fri 2/126:00 pm -
2 stops30h 50m
Deal found 9/12![KLM logo]()
$764
This Lufthansa deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:50 pm -
1 stop19h 55m
Fri 10/305:00 am -
2 stops21h 03m
Deal found 9/12![Lufthansa logo]()
$840
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/56:00 am -
2 stops20h 55m
Tue 10/135:00 am -
2 stops19h 45m
Deal found 9/10![Delta logo]()
$752
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” 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 11/27:00 am -
2 stops17h 10m
Tue 11/1710:15 am -
2 stops19h 04m
Deal found 9/8![United Airlines logo]()
$759
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/1810:50 am -
3 stops29h 55m
Tue 11/38:40 am -
2 stops35h 20m
Deal found 9/10![Multiple Airlines logo]()
$788
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:30 pm -
1 stop13h 45m
Thu 10/2911:15 am -
2 stops19h 44m
Deal found 9/12![Delta logo]()
$753
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” 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 10/1111:13 pm -
2 stops27h 47m
Sun 10/256:00 am -
1 stop15h 00m
Deal found 9/11![United Airlines logo]()
$773
This KLM deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/263:25 pm -
1 stop15h 25m
Mon 11/92:40 pm -
1 stop29h 07m
Deal found 9/12![KLM logo]()
$858
This British Airways deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:45 pm -
1 stop30h 25m
Mon 11/91:40 pm -
1 stop35h 10m
Deal found 9/12![British Airways logo]()
$876
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” 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 9/286:45 pm -
1 stop19h 15m
Tue 10/65:00 am -
1 stop19h 35m
Deal found 9/11![Delta logo]()
$758
This Turkish Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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.
Sun 12/67:05 pm -
2 stops56h 55m
Thu 12/1011:50 am -
2 stops36h 20m
Deal found 9/7![Turkish Airlines logo]()
$1,883
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” 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 3/116:50 am -
1 stop18h 40m
Wed 3/316:00 am -
1 stop13h 55m
Deal found 9/8![United Airlines logo]()
$797
This KLM deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:45 pm -
2 stops40h 25m
Wed 11/410:25 am -
2 stops32h 11m
Deal found 9/13![KLM logo]()
$894
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” 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 9/289:40 am -
2 stops21h 45m
Wed 10/75:00 am -
1 stop14h 52m
Deal found 9/11![Delta logo]()
$762
This oojo deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” 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 10/267:18 am -
2 stops23h 07m
Mon 11/25:55 pm -
2 stops47h 44m
Deal found 9/11![Multiple Airlines logo]()
$987
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:45 pm -
1 stop20h 30m
Thu 10/85:00 am -
1 stop19h 35m
Deal found 9/11![Delta logo]()
$762
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” 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 1/177:00 am -
2 stops17h 10m
Thu 1/216:05 am -
2 stops22h 05m
Deal found 9/8![United Airlines logo]()
$845
This KLM deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/112:35 pm -
1 stop15h 15m
Mon 11/302:40 pm -
1 stop29h 10m
Deal found 9/12![KLM logo]()
$939
This Trip.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” 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.
Mon 12/76:55 pm -
2 stops34h 35m
Mon 12/142:05 pm -
2 stops34h 45m
Deal found 9/9![Multiple Airlines logo]()
$990
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1711:13 pm -
2 stops26h 07m
Tue 10/2712:20 pm -
1 stop31h 40m
Deal found 9/12![United Airlines logo]()
$849
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:30 pm -
1 stop17h 55m
Mon 11/211:30 am -
1 stop34h 20m
Deal found 9/12![Delta logo]()
$780
This Expedia deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/272:02 pm -
1 stop34h 53m
Tue 11/38:10 am -
2 stops33h 29m
Deal found 9/12![Multiple Airlines logo]()
$1,003
This TAP AIR PORTUGAL deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:00 am -
2 stops20h 10m
Wed 10/2112:00 pm -
2 stops41h 55m
Deal found 9/10![TAP AIR PORTUGAL logo]()
$2,733
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 12/116:00 am -
2 stops20h 35m
Fri 12/255:00 am -
1 stop14h 50m
Deal found 9/10![Delta logo]()
$792
This SmartFares deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:03 am -
2 stops25h 02m
Sat 10/319:45 am -
2 stops31h 38m
Deal found 9/9![Multiple Airlines logo]()
$1,042
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:24 am -
1 stop19h 21m
Sat 10/3111:15 am -
1 stop17h 05m
Deal found 9/9![Delta logo]()
$794
Last-minute flights from Seattle to PortugalDiscover last-minute flight deals from Seattle to Portugal. Data last updated September 13, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Portugal. Data last updated September 13, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” 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 9/229:40 am -
2 stops21h 15m
Fri 10/25:35 am -
1 stop13h 40m
Deal found 9/9![Delta logo]()
$730
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:59 pm -
1 stop27h 26m
Thu 11/510:15 am -
1 stop17h 54m
Deal found 9/12![Delta logo]()
$633
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1111:50 am -
1 stop14h 35m
Thu 11/510:15 am -
1 stop17h 54m
Deal found 9/12![Delta logo]()
$625
This KLM deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:15 am -
1 stop19h 10m
Wed 11/45:55 am -
1 stop17h 19m
Deal found 9/12![Multiple Airlines logo]()
$629
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1210:59 pm -
1 stop27h 31m
Thu 11/510:15 am -
1 stop17h 54m
Deal found 9/12![Delta logo]()
$613
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1211:13 pm -
2 stops27h 52m
Mon 10/195:05 am -
1 stop15h 15m
Deal found 9/12![United Airlines logo]()
$734
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 10/135:50 am -
2 stops17h 10m
Thu 10/228:40 am -
2 stops17h 52m
Deal found 9/10![Multiple Airlines logo]()
$586
This KAYAK deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:50 pm -
1 stop20h 35m
Fri 11/66:15 am -
1 stop14h 45m
Deal found 9/12![Lufthansa logo]()
$627
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:40 pm -
1 stop19h 25m
Wed 11/45:55 am -
2 stops20h 40m
Deal found 9/12![Delta logo]()
$634
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:40 pm -
1 stop19h 20m
Fri 11/65:55 am -
1 stop17h 19m
Deal found 9/12![Delta logo]()
$624
This Expedia deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” 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.
Mon 10/266:12 am -
2 stops26h 48m
Mon 11/29:55 pm -
2 stops26h 55m
Deal found 9/11![Iberia logo]()
$621
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am -
1 stop20h 00m
Tue 11/36:00 am -
2 stops35h 47m
Deal found 9/12![United Airlines logo]()
$628
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 September 13, 2026.
Search for one-way flight options from Seattle to Portugal. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” 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 10/33:55 pm -
2 stops57h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” 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 10/253:35 pm -
3 stops43h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:55 pm -
2 stops44h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/263:35 pm -
3 stops46h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:55 pm -
2 stops45h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” 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 10/167:35 pm -
2 stops42h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:00 pm -
3 stops44h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:00 pm -
3 stops41h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:35 pm -
2 stops19h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![WestJet logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:00 pm -
2 stops55h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” 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 10/217:00 pm -
3 stops31h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” 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 9/277:35 pm -
3 stops34h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Multiple Airlines logo]()
$343
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 September 13, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $586 (Mytrip) |
One-way from | $277 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $972 |
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 September 13, 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
SeattleFaro
SEA Seattle/Tacoma Intl - FAO Faro
SEAFAO
Seattle/Tacoma Intl
Sat 10/3
3:55 pm-9:30 am
2 stops57h 35m
Faro
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$277
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Sun 9/27
7:35 pm-1:35 pm
3 stops34h 00m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$343
SeattleFaro
SEA Seattle/Tacoma Intl - FAO Faro
SEAFAO
Seattle/Tacoma Intl
Sat 9/19
10:01 pm-3:10 pm
3 stops57h 09m
Faro
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$401
SeattlePonta Delgada
SEA Seattle/Tacoma Intl - PDL Ponta Delgada Nordela
SEAPDL
Seattle/Tacoma Intl
Fri 10/16
7:35 pm-7:30 am
3 stops52h 55m
Ponta Delgada Nordela
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$414
Quickest round-trip
SeattleLisbon
SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado
SEALIS
Seattle/Tacoma Intl
Mon 10/26
3:35 pm-12:50 pm
1 stop14h 15m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$437
SeattleLisbon
SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado
SEALIS
Seattle/Tacoma Intl
Fri 10/23
7:00 pm-1:50 pm
1 stop34h 50m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$438
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Tue 10/13
6:50 pm-11:25 pm
1 stop20h 35m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$442
SeattleLisbon
SEA Seattle/Tacoma Intl - LIS Lisbon Humberto Delgado
SEALIS
Seattle/Tacoma Intl
Wed 9/23
7:00 pm-12:10 pm
2 stops57h 10m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$443
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Tue 10/13
8:20 pm-7:30 pm
1 stop15h 10m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$457
SeattlePorto
SEA Seattle/Tacoma Intl - OPO Porto
SEAOPO
Seattle/Tacoma Intl
Sun 10/18
10:50 am-6:50 am
2 stops36h 00m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$462
Showing 1-10 of 56 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-PDL
SEA-FNC
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-PDL
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 $470). Flying from Seattle to Portugal in June is currently the most expensive (average of $1,212). 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 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.
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 September 13, 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
7.3
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Food
7.3
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Food
7.3
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Food
7.3
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Food
7.3
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Comfort
7.7
Food
7.3
Boarding
7.8
Overall
7.8
Entertainment
7.2
Crew
8.4
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
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 September 13, 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 September 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$348 | Average$425 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$471 | Average$986 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$481 | Average$848 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$482 | Average$945 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$482 | Average$890 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$497 | Average$1,042 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$504 | Average$949 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$543 | Average$953 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$554 | Average$1,029 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$567 | Average$706 | FlexibilityNo cancel fee | On-time77% |