$357+ Cheap flights from Portugal to Seattle (SEA)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — SEA
Feb 28 — Mar 71
1 adult, Economy
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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
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 January 29, 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 January 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 3/29:30 pm
LIS
- SEA
2 stops29h 48m
Multiple Airlines
Wed 3/113:35 pm
SEA
- LIS
1 stop21h 45m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$665
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Tue 3/39:05 am
LIS
- SEA
2 stops33h 23m
Multiple Airlines
Wed 3/113:35 pm
SEA
- LIS
1 stop21h 45m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$724
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/811:05 am
LIS
- SEA
1 stop18h 18m
American Airlines
Wed 4/221:35 pm
SEA
- LIS
1 stop25h 40m
American Airlines
Deal found 1/27![American Airlines logo]()
$760
This Iberia deal was found by Cheapflights users on 1/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/176:30 am
LIS
- SEA
2 stops22h 54m
Multiple Airlines
Tue 2/246:50 pm
SEA
- LIS
1 stop18h 55m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$763
This British Airways deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1711:05 am
LIS
- SEA
1 stop18h 52m
British Airways
Tue 2/246:50 pm
SEA
- LIS
1 stop18h 55m
British Airways
Deal found 1/27![British Airways logo]()
$765
This British Airways deal was found by Cheapflights users on 1/28. 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.
Thu 2/1210:55 am
LIS
- SEA
1 stop19h 02m
British Airways
Fri 2/276:50 pm
SEA
- LIS
1 stop33h 20m
British Airways
Deal found 1/28![British Airways logo]()
$771
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/78:20 am
LIS
- SEA
2 stops22h 00m
American Airlines
Mon 2/236:44 am
SEA
- LIS
2 stops18h 21m
American Airlines
Deal found 1/27![American Airlines logo]()
$775
This American Airlines deal was found by Cheapflights users on 1/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:20 am
OPO
- SEA
2 stops22h 06m
American Airlines
Sun 4/197:00 am
SEA
- OPO
2 stops25h 00m
American Airlines
Deal found 1/26![American Airlines logo]()
$780
This British Airways deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/211:05 am
LIS
- SEA
1 stop18h 52m
British Airways
Wed 3/117:50 pm
SEA
- LIS
1 stop19h 00m
British Airways
Deal found 1/27![British Airways logo]()
$783
This American Airlines deal was found by Cheapflights users on 1/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/98:40 pm
OPO
- SEA
2 stops26h 54m
American Airlines
Tue 2/176:44 am
SEA
- OPO
2 stops21h 01m
American Airlines
Deal found 1/28![American Airlines logo]()
$784
This Delta deal was found by Cheapflights users on 1/28. 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 2/95:00 am
OPO
- SEA
2 stops21h 43m
Delta
Tue 2/171:40 pm
SEA
- OPO
1 stop12h 50m
Delta
Deal found 1/28![Delta logo]()
$844
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Wed 4/156:00 am
OPO
- SEA
2 stops24h 56m
United Airlines
Sun 4/1912:08 pm
SEA
- OPO
1 stop13h 37m
United Airlines
Deal found 1/26![United Airlines logo]()
$899
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 January 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $665 (Kiwi.com) |
One-way from | $357 (Kiwi.com) |
Popular in | July |
Cheapest in | May |
Average price | $1,117 |
Cheapflights Fare Finder
Customize your flight search to find flights from Portugal to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Portugal to Seattle that are best for you.
Fly from
Portugal
Fly to
Seattle
Route
Depart
Return
Price
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Mon 3/2
9:30 pm-7:18 pm
2 stops29h 48m
Seattle/Tacoma Intl
Wed 3/11
3:35 pm-8:20 pm
1 stop21h 45m
$665
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Tue 2/17
6:30 am-9:24 pm
2 stops22h 54m
Seattle/Tacoma Intl
Tue 2/24
6:50 pm-9:45 pm
1 stop18h 55m
$763
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Wed 4/8
12:30 pm-12:44 am
2 stops20h 14m
Seattle/Tacoma Intl
Wed 4/22
8:20 pm-11:15 pm
1 stop18h 55m
$763
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Tue 2/17
11:05 am-9:57 pm
1 stop18h 52m
Seattle/Tacoma Intl
Tue 2/24
6:50 pm-9:45 pm
1 stop18h 55m
$765
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Wed 4/8
11:05 am-9:23 pm
1 stop18h 18m
Seattle/Tacoma Intl
Wed 4/22
1:35 pm-5:55 pm
1 stop20h 20m
$765
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Thu 2/12
10:55 am-9:57 pm
1 stop19h 02m
Seattle/Tacoma Intl
Fri 2/27
6:50 pm-12:10 pm
1 stop33h 20m
$771
PortoSeattle
OPO - SEA
OPOSEA
Porto
Wed 4/15
8:20 am-10:26 pm
2 stops22h 06m
Seattle/Tacoma Intl
Sun 4/19
7:00 am-4:00 pm
2 stops25h 00m
$780
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Tue 3/3
11:50 am-10:00 pm
1 stop18h 10m
Seattle/Tacoma Intl
Wed 3/11
8:15 am-5:35 am
1 stop14h 20m
$783
LisbonSeattle
LIS - SEA
LISSEA
Lisbon Humberto Delgado
Mon 3/2
11:05 am-9:57 pm
1 stop18h 52m
Seattle/Tacoma Intl
Wed 3/11
7:50 pm-9:50 pm
1 stop19h 00m
$783
PortoSeattle
OPO - SEA
OPOSEA
Porto
Mon 2/9
8:40 pm-3:34 pm
2 stops26h 54m
Seattle/Tacoma Intl
Tue 2/17
6:44 am-11:45 am
2 stops21h 01m
$784
Showing 1-10 of 32 results
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.
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
What is the cheapest month to book a flight from Portugal to Seattle?
Currently, April is the cheapest month in which you can book a flight from Portugal to Seattle (average of $693). Flying from Portugal to Seattle in July is currently the most expensive (average of $970). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How often are flights from Portugal to Seattle delayed?
About 50% of weekly flights between Portugal and Seattle have experienced delays in the past year, with the average delay time being 108 minutes.
What is the most punctual flight time for Portugal to Seattle flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated January 29, 2026.
Read reviews from past customers who have flown Delta, Air France, and United Airlines 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.
Comfort
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.9
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.9
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.9
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.9
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.9
Food
7.2
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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 locationsTacoma
SeaTac
Lakewood
Ocean Shores
Olympia
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Lacey
Edmonds
Renton
Puyallup
Kirkland
Kent
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis
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Alternative routes for Portugal to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Top 4 airlines flying from Portugal to Seattle
Discover the top 4 airlines that operate flights from Portugal to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$720 | Average$1,128 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$738 | Average$1,236 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$762 | Average$1,159 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$775 | Average$1,040 | FlexibilityNo cancel fee | On-timeN/A |