$341 Find Cheap Flights from Portugal to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 5/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Portugal to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portugal to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portugal to Seattle

Fri, May 1 - Sat, May 16
Aer Lingus Logo
10:15 pm - 5:10 pm
LIS
-
SEA
26h 55m
1 stop
Aer Lingus Logo
7:10 pm - 9:35 pm
SEA
-
LIS
18h 25m
1 stop
$729Aer Lingus
Fri, May 15 - Sun, May 24
Multiple Airlines Logo
7:10 am - 9:40 am
OPO
-
SEA
34h 30m
2 stops
Multiple Airlines Logo
3:40 pm - 8:30 pm
SEA
-
OPO
20h 50m
2 stops
$784Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
9:45 am - 7:23 pm
OPO
-
SEA
17h 38m
1 stop
Multiple Airlines Logo
7:00 pm - 6:30 pm
SEA
-
OPO
39h 30m
2 stops
$822Multiple Airlines
Thu, May 14 - Fri, May 29
Scandinavian Airlines Logo
7:00 am - 10:45 pm
LIS
-
SEA
23h 45m
2 stops
Scandinavian Airlines Logo
3:55 pm - 3:35 pm
SEA
-
LIS
15h 40m
1 stop
$861Scandinavian Airlines
Sat, Sep 5 - Fri, Sep 18
Scandinavian Airlines Logo
4:25 pm - 1:45 pm
LIS
-
SEA
29h 20m
1 stop
Scandinavian Airlines Logo
3:55 pm - 3:35 pm
SEA
-
LIS
15h 40m
1 stop
$885Scandinavian Airlines
Wed, Apr 8 - Wed, Apr 22
Turkish Airlines Logo
10:55 am - 5:15 pm
LIS
-
SEA
38h 20m
1 stop
Turkish Airlines Logo
7:10 pm - 11:45 pm
SEA
-
LIS
20h 35m
1 stop
$910Turkish Airlines
Sat, Jun 6 - Mon, Jun 15
KLM Logo
5:00 am - 11:37 am
LIS
-
SEA
14h 37m
1 stop
KLM Logo
1:55 pm - 2:35 pm
SEA
-
LIS
16h 40m
1 stop
$911KLM
Wed, Apr 8 - Wed, Apr 22
Turkish Airlines Logo
5:55 am - 5:15 pm
LIS
-
SEA
19h 20m
1 stop
Turkish Airlines Logo
7:10 pm - 3:45 pm
SEA
-
LIS
36h 35m
1 stop
$913Turkish Airlines
Sat, Jun 6 - Mon, Jun 15
Delta Logo
5:00 am - 4:35 pm
LIS
-
SEA
19h 35m
2 stops
Delta Logo
1:55 pm - 2:35 pm
SEA
-
LIS
16h 40m
1 stop
$921Delta
Sat, Apr 11 - Sat, Apr 25
Delta Logo
5:00 am - 2:50 pm
OPO
-
SEA
17h 50m
2 stops
Delta Logo
12:00 pm - 3:25 pm
SEA
-
OPO
19h 25m
2 stops
$939Delta
Booking Insights

KAYAK's insights & trends for flights to Seattle

Get data-powered insights and trends for flights to Seattle to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Seattle?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to Seattle was found on the route from Lisbon, at $729 return. The most popular connection is from Los Angeles to Seattle and KAYAK users have found round-trip deals for as low as $86 in the last 3 days.

What is the cheapest month to fly to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to Seattle is February, where tickets cost $825 on average for return flights. On the other hand, the most expensive months are January and July, where the average cost of tickets from Portugal is $1,326 and $1,211 respectively. For one-way flights, the best month to travel is February with an average price of $825.

Good to know

Low seasonFebruary
Cheapest flight$341
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from Lisbon to Seattle

FAQs - booking Seattle flights

  • What is the cheapest flight to Seattle?

    In the last 3 days, the cheapest flight deal to Seattle was found on the route from Lisbon, at $729 return. The most popular connection is from Los Angeles to Seattle and KAYAK users have found round-trip deals for as low as $86 in the last 3 days.

  • How far is Seattle/Tacoma Intl Airport from central Seattle?

    You’ll need to travel 11 miles to reach the Seattle city center from Seattle/Tacoma Intl Airport.

  • What is the name of Seattle’s airport?

    When flying to Seattle, you'll arrive at Seattle/Tacoma Intl Airport (SEA). The airport is also known as Seattle-Tacoma Intl, Seattle/Tacoma, or Seattle/Tacoma Intl.

  • How does KAYAK find such low prices on flights to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to Seattle are there each week?

    Each week there are around 4,015 direct flights from within Portugal to Seattle. The most common day for departures is Wednesday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to Seattle

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle flight deals.

Reviews of the top airlines flying from Portugal to Seattle

 
See real verified KAYAK customer reviews for airlines flying to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Portugal to Seattle. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8318 reviews
8.5Crew
7.8Entertainment
8.1Boarding
7.9Comfort
7.2Food
Airline reviews

Kayak botched up the booking, i had to call delta and fix. In the process Delta failed to honor my comfort plus seat assignment that i had previously.

2.0 MediocreSreekumar, Mar 2026
FLL - DTW
Read more Delta reviews

Kayak botched up the booking, i had to call delta and fix. In the process Delta failed to honor my comfort plus seat assignment that i had previously.

Entertainment is ok! Boarding and seat with zone is terrible. I paid for the seats but you didn’t give me what I paid for which is exit isles.

the crew cancel the morning service due to the weather. Then the flight got deverted to Nashville . we were on the ground for over two hours the only gave us water once... no food or any snacks.... the crew should have handled better and offered something to passengers.

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

Delta needs to step its game up get a more reliable internet service. Internet service was non-existent for this flight.

Mechanical Delay of over an hour with multiple gate changes. Entertainment system down for rejuvenation.

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

Prior to takeoff, the pilot told us there was a possibility of not being able to land and going to Portland. Well that happened, we took off and then did 8 loops around Spokane before the pilot told us we ran out of fuel and had to go to Portland. So for a 35 minute flight we have now been on the plane for 3 hours (boarded at 6:50 am and landed in Portland at 10:30). Then, we just sat in Portland's airport with no updates of when we can start heading back. All of a sudden, our pilots and crew just left, leaving us stranded in a different city and state. We continued to sit in Portland until we finally got a new crew assigned and boarded the plane (This was from 10:30-2). We then sat on the plane for an additional hour before take off because they had to count us multiple times. We finally landed in Spokane at 3:55 PM. So a flight that should have taken at max an hour took us 10 hours and we missed the majority of the recruiting event we went for.

The boarding was efficient. The entertainment system was a bit unstable but Air France has a good selection of movies.

They lost my bag and I still haven’t received it yet

They lost my bag and I still have not received it

Communication on the delay, rebooking and how to get a hotel was poor. Mails, airport check-in and transfer desk said different things.

Not consistent with the food quality (I mean taste not freshness)

Safe and stable made me sleepy and I slept and dreamt 😂😂😂😂

Food was really mediocre for premium economy in comparison to other airlines… the crew was nowhere to be found… 14 hour flight…

I don’t like that an equipment change caused my seat to change from 23A to 44A. The boarding was also delayed. The crew were excellent, however and very attentive. The food was not bad.

Our flight crew were terrific. And they handle a difficult passenger with finesse.

Excellent, Lima to Paris. But Paris to Amsterdam, delayed, missed my flight and KLM treated its missed flights passengers very badly, terribly bad. No hotel accommodation given. Passengers were told to find their own hotel accommodation and claim at reasonable rate and left the booth and literally with armed Police Officers listening to passengers complains. For three hours, after moving by Uber from hotel to hotel and calling and booking online, no hotel was available. I had to return to the airport and seat/sleep on the benches, suffering the cold, and rats running around until my new allocated flight the next day. It was the most terrible KLM treatment even seen and being a Business Class passenger. Still mentally suffering to date as a result.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
Centralia
Fife
Lakewood
Westport
Mukilteo
Lacey
Edmonds
Aberdeen
Poulsbo
Woodinville
Shoreline
DuPont
Monroe
Castle Rock
Edgewood

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle