$346+ Cheap flights from Portugal to Seattle (SEA)
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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
Oct 5 — Oct 121
Round-trip
1 adult, Economy
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Find cheap flights from Portugal to Seattle 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Portugal to Seattle
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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 September 5, 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 September 5, 2026.
This Trip.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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.
Sat 10/249:10 am -
1 stop19h 04m
Sat 11/77:24 am -
2 stops27h 56m
Deal found 9/3![Multiple Airlines logo]()
$677
This Trip.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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.
Fri 10/237:45 pm -
1 stop32h 29m
Sat 11/77:24 am -
2 stops27h 56m
Deal found 9/3![Multiple Airlines logo]()
$682
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 10/257:45 am -
1 stop17h 20m
Sun 11/16:55 pm -
1 stop16h 50m
Deal found 9/4![Multiple Airlines logo]()
$711
This Mytrip deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/136:30 am -
2 stops17h 10m
Tue 10/206:05 pm -
2 stops17h 35m
Deal found 9/1![Multiple Airlines logo]()
$712
This Mytrip deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:35 am -
2 stops22h 05m
Sat 10/177:00 pm -
2 stops20h 40m
Deal found 9/3![Multiple Airlines logo]()
$756
This Rumbo deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2510:15 pm -
1 stop26h 55m
Sat 10/107:10 pm -
1 stop18h 25m
Deal found 9/2![Aer Lingus logo]()
$783
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/106:10 am -
2 stops35h 30m
Thu 10/157:10 pm -
1 stop30h 15m
Deal found 9/3![Multiple Airlines logo]()
$788
This Rumbo deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:15 pm -
1 stop26h 55m
Sat 10/37:10 pm -
1 stop18h 25m
Deal found 9/2![Aer Lingus logo]()
$826
This Mytrip deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 10/247:15 pm -
2 stops26h 45m
Sun 11/13:15 pm -
3 stops33h 15m
Deal found 9/3![Multiple Airlines logo]()
$829
This Mytrip deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:40 am -
2 stops22h 00m
Thu 10/227:00 pm -
2 stops17h 00m
Deal found 8/31![Multiple Airlines logo]()
$836
This Mytrip deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 9/156:15 am -
2 stops35h 25m
Mon 9/213:40 pm -
2 stops21h 55m
Deal found 9/4![Multiple Airlines logo]()
$864
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/106:10 am -
2 stops35h 30m
Wed 10/147:10 pm -
1 stop14h 40m
Deal found 9/3![Multiple Airlines logo]()
$869
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 September 5, 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 September 5, 2026.
This Trip.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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.
Sat 10/249:10 am -
1 stop19h 04m
Sat 11/77:24 am -
2 stops27h 56m
Deal found 9/3![Multiple Airlines logo]()
$677
This KLM deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/135:00 am -
1 stop14h 52m
Tue 10/201:30 pm -
1 stop17h 55m
Deal found 9/1![KLM logo]()
$889
This Delta deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/135:00 am -
1 stop14h 52m
Tue 10/2011:05 am -
2 stops20h 20m
Deal found 9/1![Delta logo]()
$890
This Mytrip deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/136:30 am -
2 stops17h 10m
Tue 10/206:05 pm -
2 stops17h 35m
Deal found 9/1![Multiple Airlines logo]()
$712
This Mytrip deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:35 am -
2 stops22h 05m
Sat 10/177:00 pm -
2 stops20h 40m
Deal found 9/3![Multiple Airlines logo]()
$756
This Delta deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/225:00 am -
1 stop14h 52m
Mon 10/264:20 pm -
1 stop22h 40m
Deal found 9/1![Delta logo]()
$890
This KLM deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 10/25:00 am -
1 stop14h 52m
Sat 10/171:30 pm -
1 stop17h 55m
Deal found 9/4![KLM logo]()
$891
This Mytrip deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:00 pm -
3 stops27h 55m
Mon 10/263:35 pm -
3 stops33h 35m
Deal found 9/1![Multiple Airlines logo]()
$807
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 10/25:00 am -
1 stop14h 52m
Sat 10/1711:05 am -
2 stops20h 20m
Deal found 9/4![Delta logo]()
$891
This Delta deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 10/155:00 am -
1 stop19h 35m
Thu 10/226:40 pm -
1 stop15h 10m
Deal found 8/31![Delta logo]()
$896
This Delta deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” 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 9/225:00 am -
1 stop14h 47m
Fri 10/26:40 pm -
1 stop15h 10m
Deal found 8/31![Delta logo]()
$896
This KLM deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 9/215:00 am -
1 stop19h 35m
Wed 10/146:40 pm -
1 stop15h 10m
Deal found 9/1![Multiple Airlines logo]()
$897
This Delta deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/255:00 am -
1 stop14h 47m
Sat 10/1011:50 am -
2 stops19h 05m
Deal found 9/3![Delta logo]()
$897
This KLM deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/225:00 am -
1 stop14h 52m
Sun 10/254:20 pm -
1 stop18h 10m
Deal found 9/1![Multiple Airlines logo]()
$898
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 1/75:00 am -
1 stop14h 50m
Mon 1/113:25 pm -
1 stop18h 05m
Deal found 9/2![Delta logo]()
$898
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 1/165:00 am -
1 stop14h 50m
Sun 1/317:15 am -
2 stops20h 10m
Deal found 9/4![Delta logo]()
$899
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 2/25:00 am -
2 stops21h 38m
Tue 2/168:30 am -
2 stops22h 40m
Deal found 9/4![Delta logo]()
$905
Last-minute flights from Portugal to SeattleDiscover last-minute flight deals from Portugal to Seattle. Data last updated September 5, 2026 and is based on user searches.
Discover last-minute flight deals from Portugal to Seattle. Data last updated September 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/106:10 am -
2 stops35h 30m
Thu 10/157:10 pm -
1 stop30h 15m
Deal found 9/3![Multiple Airlines logo]()
$788
This Mytrip deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:40 am -
2 stops22h 00m
Mon 9/147:00 pm -
2 stops20h 20m
Deal found 8/31![Multiple Airlines logo]()
$839
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/106:10 am -
2 stops35h 30m
Wed 10/147:10 pm -
1 stop14h 40m
Deal found 9/3![Multiple Airlines logo]()
$869
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/105:00 am -
1 stop19h 35m
Mon 9/146:45 pm -
1 stop19h 45m
Deal found 9/2![Delta logo]()
$889
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:35 pm -
1 stop19h 01m
Mon 9/147:30 am -
1 stop18h 15m
Deal found 9/3![United Airlines logo]()
$1,025
This Mytrip deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/119:00 am -
2 stops34h 45m
Tue 9/157:00 pm -
2 stops19h 55m
Deal found 9/4![Multiple Airlines logo]()
$808
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 9/115:00 am -
1 stop19h 35m
Tue 9/156:45 pm -
1 stop19h 20m
Deal found 9/4![Delta logo]()
$891
This Mytrip deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 9/156:15 am -
2 stops35h 25m
Mon 9/213:40 pm -
2 stops21h 55m
Deal found 9/4![Multiple Airlines logo]()
$864
This Rumbo deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:15 pm -
1 stop26h 55m
Sat 10/37:10 pm -
1 stop18h 25m
Deal found 9/2![Aer Lingus logo]()
$826
This Rumbo deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2510:15 pm -
1 stop26h 55m
Sat 10/107:10 pm -
1 stop18h 25m
Deal found 9/2![Aer Lingus logo]()
$783
This Mytrip deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:40 am -
2 stops22h 00m
Thu 10/227:00 pm -
2 stops17h 00m
Deal found 8/31![Multiple Airlines logo]()
$836
This Mytrip deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 10/247:15 pm -
2 stops26h 45m
Sun 11/13:15 pm -
3 stops33h 15m
Deal found 9/3![Multiple Airlines logo]()
$829
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 September 5, 2026.
Search for one-way flight options from Portugal to Seattle. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/106:10 am -
3 stops44h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![WestJet logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:00 am -
2 stops35h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![WestJet logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/156:15 am -
3 stops35h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Multiple Airlines logo]()
$446
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/199:45 pm -
3 stops30h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$454
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 11/28:30 pm -
3 stops49h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Multiple Airlines logo]()
$463
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 11/21:30 pm -
3 stops56h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Multiple Airlines logo]()
$471
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 11/208:50 pm -
3 stops48h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$472
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/126:10 am -
3 stops59h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$473
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/208:35 pm -
2 stops45h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$474
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/205:45 pm -
3 stops31h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$478
This Kiwi.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” 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 10/217:15 am -
2 stops35h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Multiple Airlines logo]()
$483
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 September 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $677 (Trip.com) |
One-way from | $346 (Kiwi.com) |
Popular in | July |
Cheapest in | December |
Average price | $1,007 |
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 7,457,451 searches. Data last updated September 5, 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 Porto - SEA Seattle/Tacoma Intl
OPOSEA
Porto
Thu 10/22
7:15 am-3:17 pm
3 stops40h 02m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$481
LisbonSeattle
LIS Lisbon Humberto Delgado - SEA Seattle/Tacoma Intl
LISSEA
Lisbon Humberto Delgado
Wed 10/21
5:55 am-5:55 pm
2 stops44h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$494
PortoSeattle
OPO Porto - SEA Seattle/Tacoma Intl
OPOSEA
Porto
Wed 10/21
5:25 pm-5:10 pm
3 stops31h 45m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$510
LisbonSeattle
LIS Lisbon Humberto Delgado - SEA Seattle/Tacoma Intl
LISSEA
Lisbon Humberto Delgado
Fri 10/23
6:35 am-6:45 pm
3 stops44h 10m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$523
PortoSeattle
OPO Porto - SEA Seattle/Tacoma Intl
OPOSEA
Porto
Tue 10/27
6:10 am-2:00 pm
2 stops38h 50m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$527
LisbonSeattle
LIS Lisbon Humberto Delgado - SEA Seattle/Tacoma Intl
LISSEA
Lisbon Humberto Delgado
Tue 9/29
10:00 pm-6:45 pm
3 stops52h 45m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$537
PortoSeattle
OPO Porto - SEA Seattle/Tacoma Intl
OPOSEA
Porto
Mon 9/14
6:30 am-10:34 am
2 stops36h 04m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$623
PortoSeattle
OPO Porto - SEA Seattle/Tacoma Intl
OPOSEA
Porto
Fri 11/6
6:05 am-4:50 pm
1 stop18h 45m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$649
PortoSeattle
OPO Porto - SEA Seattle/Tacoma Intl
OPOSEA
Porto
Sun 10/25
8:35 pm-6:05 pm
2 stops28h 30m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$650
LisbonSeattle
LIS Lisbon Humberto Delgado - SEA Seattle/Tacoma Intl
LISSEA
Lisbon Humberto Delgado
Fri 11/20
11:05 am-10:31 pm
1 stop19h 26m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$668
Showing 1-10 of 37 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, February is the cheapest month in which you can book a flight from Portugal to Seattle (average of $897). Flying from Portugal to Seattle in July is currently the most expensive (average of $1,463). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing 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 September 5, 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
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Food
7.2
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Comfort
7.8
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
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Edmonds
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
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Alternative routes for Portugal to Seattle
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Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Portugal to Seattle by cabin class
Find flights from Portugal to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Portugal and Seattle flights
Browse other Portugal and Seattle flight options. Last updated on September 5, 2026.
Popular flight searches
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Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 5, 2026.
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 7,457,451 searches. Data last updated September 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$973 | Average$1,148 | FlexibilityNo cancel fee | On-timeN/A |