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SEA - LIS

$346 Find cheap flights from Seattle to Lisbon

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Lisbon departing on 8/12. 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
0 bags
Mon 6/3
Mon 6/10

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Lisbon.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Lisbon.
In the last 7 days travelers have searched 43,693,958 times on KAYAK, and here is why:

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Cheap flight deals from Seattle to Lisbon (SEA-LIS)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Lisbon 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 and deals for you by selecting your travel dates.
Choose your dates
7:45 pm - 9:50 pmSEA-LIS
19h 05m1 stop
11:15 am - 9:43 pmLIS-SEA
18h 28m1 stop
$699British Airways
Find Deal
Wed, Oct 30 - Wed, Nov 27
1:39 pm - 5:45 pmSEA-LIS
21h 06m2 stops
8:20 am - 9:15 pmLIS-SEA
20h 55m2 stops
$704American Airlines
Find Deal
Wed, Oct 30 - Wed, Nov 27
1:35 pm - 11:15 amSEA-LIS
13h 40m1 stop
10:00 am - 7:31 pmLIS-SEA
17h 31m1 stop
$741Air France
Find Deal
Wed, Jul 17 - Wed, Sep 4
1:35 pm - 5:55 pmSEA-LIS
20h 20m1 stop
5:40 am - 11:20 amLIS-SEA
13h 40m1 stop
$742Air France
Find Deal
Mon, Aug 19 - Thu, Aug 29
11:15 am - 2:50 pmSEA-LIS
19h 35m2 stops
10:00 am - 10:23 pmLIS-SEA
20h 23m1 stop
$746Delta
Find Deal
Wed, Jul 17 - Wed, Sep 4
6:30 am - 11:15 amSEA-LIS
20h 45m2 stops
5:40 am - 11:20 amLIS-SEA
13h 40m1 stop
$747Delta
Find Deal
Mon, Aug 19 - Thu, Aug 29
12:30 am - 9:20 amSEA-LIS
24h 50m2 stops
12:50 pm - 10:01 pmLIS-SEA
17h 11m1 stop
$831United Airlines
Find Deal
Tue, Jul 16 - Wed, Sep 4
12:30 am - 9:20 amSEA-LIS
24h 50m2 stops
12:20 pm - 7:57 amLIS-SEA
27h 37m2 stops
$840United Airlines
Find Deal
Tue, Jul 16 - Wed, Sep 4
5:50 am - 9:20 amSEA-LIS
19h 30m2 stops
11:00 am - 9:16 amLIS-SEA
30h 16m2 stops
$854Air Canada
Find Deal
Sun, Sep 1 - Wed, Nov 27
7:40 am - 9:20 amSEA-LIS
17h 40m1 stop
11:25 am - 9:15 pmLIS-SEA
17h 50m1 stop
$858Air Canada
Find Deal
Tue, Sep 24 - Wed, Oct 9

Flights from Seattle to Lisbon - Travel Insights & Trends

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

What’s the cheapest day of the week to fly from Seattle to Lisbon?

The average price of all flights from Seattle to Lisbon clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Lisbon on a Monday and more expensive on a Friday. On your return trip to Seattle, you should consider flying back on a Monday, and avoid Sundays for better deals.

What is the cheapest month to fly from Seattle to Lisbon?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Seattle to Lisbon, 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 from Seattle to Lisbon is January, where tickets cost $769 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,587 and $1,544 respectively.

How far in advance should I book a flight from Seattle to Lisbon?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Seattle to Lisbon, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Seattle to Lisbon, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 37 days before departure.

Which airlines provide the cheapest flights from Seattle to Lisbon?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on Air Canada ($652) and Finnair ($654). The cheapest round-trip tickets were found on British Airways ($699) and American Airlines ($704).

Good to know

Low season

January

High season

September

Cheapest flight

$346
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Seattle to Lisbon

When to book flights from Seattle to Lisbon

Are your dates flexible? Find out the best times to travel from Seattle to Lisbon based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Lisbon

  • How early should I get to SEA on the date I’m supposed to travel?

    On the date you’re supposed to fly to Lisbon from Seattle, it’s in your best interest to reach SEA at least 2h ahead of your flight. Getting to this airport this early will give you adequate time to go through the airport’s time-consuming checkpoints and check out the interesting sites available in its terminals.

  • Does SEA have a spa?

    If you’d like to visit a spa while waiting for your flight at SEA, you’re in luck, as this airport is home to the fabulous Terminal Gateway Spa. Situated a short distance from Gate A5, this spa features exceptional professionals. Given that it offers its services at affordable rates, you won’t incur an exaggerated bill at this spa.

  • Can I leave my luggage at LIS?

    LIS has a luggage storage facility. Located next to car park P2, this facility offers secure storage services at affordable rates. It’s worth noting that as it is usually open 24/7, you can pick up your luggage at this facility whenever you feel like it.

  • Where can I shower at LIS?

    At LIS, you can shower at either ANA Lounge, located on the 6th floor of Terminal 1, or the Airport Business Center, near check-in desks 14 to 36 in Terminal 1. Please note that to gain entry to either, you’ll have to pay an entry fee.

  • What is the cheapest flight from Seattle to Lisbon?

    In the last 3 days, the lowest price for a flight from Seattle to Lisbon was $346 for a one-way ticket and $699 for a round-trip.

  • Do I need a passport to fly between Seattle and Lisbon?

    Yes, you’ll need a passport to travel to Lisbon from Seattle.

  • Which aircraft models fly most regularly from Seattle to Lisbon?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Lisbon?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Seattle and Lisbon, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Lisbon from Seattle?

    London is the most popular layover city among KAYAK users traveling from Seattle to Lisbon.

  • Which is the best airline for flights from Seattle to Lisbon, Delta or Air France?

    The two airlines most popular with KAYAK users for flights from Seattle to Lisbon are Delta and Air France. With an average price for the route of $1,062 and an overall rating of 8.0, Delta is the most popular choice. Air France is also a great choice for the route, with an average price of $1,098 and an overall rating of 7.5.

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

    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 from Seattle to Lisbon.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Lisbon from 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 from Seattle to Lisbon?

    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 Lisbon with an airline and back to Seattle with another airline. Booking your flights between Seattle and LIS can sometimes prove cheaper using this method.

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

    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 Lisbon from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from SEA to Lisbon

  • If you are traveling to Lisbon with your kids, you should consider checking out Seattle-Tacoma International Airport’s (SEA) children’s play area. Located between the Central Terminal and Gates A, this children’s play area features a variety of toys and soft play areas for toddlers. Given that it is normally open round-the-clock, you can count on finding it open regardless of the time.
  • SEA features several nursing rooms. These nursing rooms are near Gates A9, C10, D10, D23, and N2. As they all feature changing tables, you can comfortably change your baby’s diapers in any of these rooms.
  • To pay for services and purchase goods easily once you land at Humberto Delgado Airport (LIS), you should convert some of your cash to the local currency. At SEA, you’ll be able to do so, as this airport features currency exchange sites. They are located in the ticketing level and baggage claim area in the Main Terminal and near Gates A and S.
  • LIS features information desks in its Arrivals Hall and Departures Hall. At any of these information desks, open from 7 am to 12 am, you can rest assured of getting the help you need once you land at this airport, as they are both manned by informed airport staff.
  • If you have the necessary documents, you can easily rent a car at LIS, as this airport features counters for car rental agencies such as Hertz, SIXT, Europcar, Avis, Budget, and other local car rentals. As the counters for these car rentals are within the airport’s terminal complex, you won’t need any form of ground transportation to get to the counter of your preferred car rental.
See more tips

Top 5 airlines serving from Seattle to Lisbon

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Lisbon. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Lisbon? 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.
8.0
DeltaOverall score based on 10848 reviews
8.2Boarding
7.9Comfort
8.0Entertainment
8.6Crew
7.4Food
Airline reviews

Had a broken tray in business class. Crew just shrugged it off.

2.0 MediocreShiva, Apr 2024SEA - SFO
Read more about Delta reviews

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Old cabine without flat bed in business for a 12 hour flight is not acceptable

Generally good. The crew is excellent. The food could be better.

They wanted to close counter although they did not provide the wheelchair requested which ended by going alone to transit security and lost long time and they did not want to wait .

Did not find the wheelchair that supposed to assist and went to a long queue for transit security chk which was very slow and boarding desk wanted to close counter although that they knew that I am minutes away because of their mistake of not providing the wheelchair.

They charge me for luggage which is was included on the ticket

Business class in the second leg - CDG-EVN was a disaster.

worst experience ever i choose my seat in advance and also have my seat selected in my boarding and the they told me that my seat has been changed without notify me

No birding was given for next trip on same carrier, food was very moderate.

We transited through Chad and what was supposed to be a 1hr 20 minutes transit time lasted over 4hrs. We didn't get regular updates until we complained. After a 10hr flight from Paris no form of refreshment given and finally arrived Abuja over 6hrs later and none of my bags came

The line at boarding was not well organized and managed

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

All flights were on time and boarding was issue free

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Food was terrible Not many options Stewards dont care Delay

Water service would be great. The way they board is terrible. Slow passengers first😂😂 They need to smart up a bit

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

All was good, except our baggage was lost for most of a day. We are thankful that it was found quickly and delivered to our hotel. Rouge was fine outside of that problem.

You do not have a space for flight cancelled. BUT!!! Air Canada handled it great. Was booked on another airline for the next day. The original flight was booked solid. But he precheck by the maintenance found a mechanical problem and the plane was not safe to fly. It was an inconvenience to have to wait until next day but I would rather arrive safely.

Very good other than we have to wait for one crew and we’re delayed and the pilot and his co- pilot has to make a difference to be right on time arrival. Disappointed about no food service also.

I had written all my complaints on my trip from Grand Junction to Denver so I will repeat it here! I was absolutely appalled that I had to pay for a regular seat that I choose 24 hrs before boarding! Also I checked my large bag which I had to pay for as well, and by the time I boarded all the room in the bins were gone so also had to check that one. I noticed people pulling out oversized suitcases, bigger than the measurements stated for carry on, and also large pack packs stuffed full! So these people were taking up 2 or 3 spaces that the rest of us should have been able to use but couldn’t! NoTV on the flight! Thankfully I had downloaded the United Airlines app and was able to watch movies on my phone. Don’t remember the last time I flew in a plane with no movie screens!

I was appalled to have to pay for just a regular seat when I went to book 24 hrs before my flight! Because it was only an hour flight I didn’t choose a seat from Grand Junction to Denver, but I did for Toronto and had to pay just to choose a regular available seat! In my 60+ years of flying this was the first time I have heard of this. Also, allowing people to bring on “huge “ suitcases, not carry on size, but much bigger, and then a large pack pack stuffed. So they take up all the room in the overhead bins and if we are later boarding, there is no room so we have to check our small carry on. I have already paid for and checked in one bag! I certainly will not choose to fly with United again unless it is the “only” airline available!

Easy boarding, roomy seats, plenty of good food, very helpful snd friendly staff. Very smooth flight! Only thing that could have been better was to have cranberry juice. Women like this as it helps avoid UTI’s and not as sweet as other juices.

The crew was friendly, the seats are too small. Air travel is barely tolerable anymore.

Food was icecold or frozen including breakfast. Hopeless service. Rude crew.

The flight was very uncomfortable and there was no snacks served for the 13 hours international flight. In addition, the flight was delayed 3 hours

Due to a strike taking place with the airline, it negatively impacted my flight in multiple ways. My flight was delayed over 2 hours and the food served was mediocre at best.

The seats were tiny, being of a fairly petite build, I don’t usually expect to feel crammed and cramped in a seat, but I definitely was on this flight. I couldn’t even bend over to get anything out from under the seat in front and getting up to go to the bathroom at night with the seat backs reclined was nearly impossible. I had to do gymnastics to get over and out. For an airline that does long flights overnight, it’s kind of ridiculous.

Not connecting flights. Missed my flight from Dublin to Liverpool because I arrived at Dublin one hour too late. For this mistake, they offered me a flight from Dublin to Manchester. Thats great and all, but I waste time and money to commute to Liverpool. Be sure to check the time of your connecting flights, because they sure don’t when they sell it to you

Excellent! Great flight attendants, good food (in business class, at least), very comfortable. Touchscreen and remote wasn’t great.

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

I've done hundreds of flights in my life, and this flight was one of the best I've ever taken, From beginning to end, everything went smoothly, professionally, and with a smile and friendly attitude from all employees I interacted with. The food was delicious (and free), as were the drinks. There was just a genial and effective way in the way that British Airways organized the flight -that reminded of days in the 70's, 80's, and 90's, when flying was a fun, and exciting adventure. I enjoyed and had confidence in the abilities of the flight crew, I'll be flying British Airways several more times this summer. Thank you so much for the great experience! Cheryl Olso

My baggage did not arrived with me. Took 3 days to get it after so may calls and follow up

Terrible! I missed my flight to my final destination and British airlines and American Airlines keep pointing fingers on each other’s. Nobody wants to take responsibility

Terrible. Flight was 3 hours delayed and I missed my other flight to my final destination

Overall, terrific service, accommodations, and experience. Only reason comfort was rated lower was because it was difficult to keep a comfortable sleeping position for the overnight flight, but I also had an economy seat.

Book cheap flights from Seattle to Lisbon

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to Lisbon found on KAYAK in the last 72 hours.
8/12Mon
3 stops
48h 25mSEA-LIS
$346
8/13Tue
2 stops
26h 05mSEA-LIS
$359
8/13Tue
3 stops
25h 55mSEA-LIS
$364
7/15Mon
1 stopAir Canada
17h 40mSEA-LIS
$652
7/13Sat
1 stopUnited Airlines
28h 00mSEA-LIS
$658
7/20Sat
1 stopAir Canada
28h 00mSEA-LIS
$785
7/12Fri
1 stopAer Lingus
31h 30mSEA-LIS
$823
7/11Thu
1 stopAer Lingus
32h 00mSEA-LIS
$840
6/17Mon
2 stopsUnited Airlines
24h 21mSEA-LIS
$881
7/13Sat
2 stopsBritish Airways
17h 26mSEA-LIS
$973

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Last minute flights from Seattle to Lisbon

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to Lisbon that are departing in the next 10 days.
5/6Mon
multi-stop
21h 00mSEA-LIS
5/14Tue
multi-stop
17h 25mLIS-SEA
$991
5/9Thu
multi-stopTurkish Airlines
31h 15mSEA-LIS
5/13Mon
multi-stopTurkish Airlines
32h 20mLIS-SEA
$1,030
5/8Wed
multi-stop
22h 10mSEA-LIS
5/14Tue
multi-stop
17h 25mLIS-SEA
$1,180
5/8Wed
multi-stop
23h 44mSEA-LIS
5/14Tue
multi-stop
23h 02mLIS-SEA
$1,230
5/9Thu
multi-stop
26h 25mSEA-LIS
5/23Thu
multi-stop
15h 30mLIS-SEA
$1,239
5/8Wed
multi-stop
26h 25mSEA-LIS
5/14Tue
multi-stop
17h 25mLIS-SEA
$1,240
5/9Thu
multi-stopUnited Airlines
16h 14mSEA-LIS
5/23Thu
multi-stopUnited Airlines
26h 53mLIS-SEA
$1,528
5/9Thu
multi-stopUnited Airlines
13h 30mSEA-LIS
5/23Thu
multi-stopUnited Airlines
15h 20mLIS-SEA
$1,979
5/8Wed
multi-stopAmerican Airlines
23h 50mSEA-LIS
5/13Mon
multi-stopAmerican Airlines
18h 51mLIS-SEA
$2,998
5/9Thu
multi-stopAmerican Airlines
23h 50mSEA-LIS
5/27Mon
multi-stopAmerican Airlines
19h 29mLIS-SEA
$3,620

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Seattle - Lisbon Flights

Departure:

Seattle (SEA)United States

Destination:

Lisbon (LIS)Portugal

Return flight deals:

Lisbon - Seattle

Cabin classes:

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