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$236 Cheap Flights from Seattle (SEA) to Lisbon (LIS)

View $236 flight on Wed, Feb 24, 2027Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Humberto Delgado Airport (LIS)

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Cheap Flights from Seattle to Lisbon (SEA-LIS)

Prices were available within the past 7 days and start at $236 for one-way flights and $724 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, Feb 24 - Wed, Mar 3
SEA
Seattle
LIS
Lisbon
$724 Roundtrip, found 7 hours ago
$724
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Wed, Feb 24 from Seattle to Lisbon, returning Wed, Mar 3, priced at $724 found 7 hours ago
Icelandair
Wed, Feb 17 - Tue, Mar 2
SEA
Seattle
LIS
Lisbon
$730 Roundtrip, found 7 hours ago
$730
Roundtrip
found 7 hours ago
Select Icelandair flight, departing Wed, Feb 17 from Seattle to Lisbon, returning Tue, Mar 2, priced at $730 found 7 hours ago
Air Canada
Mon, Oct 26 - Wed, Nov 11
SEA
Seattle
LIS
Lisbon
$743 Roundtrip, found 7 hours ago
$743
Roundtrip
found 7 hours ago
Select Air Canada flight, departing Mon, Oct 26 from Seattle to Lisbon, returning Wed, Nov 11, priced at $743 found 7 hours ago
United
Mon, Oct 26 - Wed, Nov 11
SEA
Seattle
LIS
Lisbon
$744 Roundtrip, found 7 hours ago
$744
Roundtrip
found 7 hours ago
Select United flight, departing Mon, Oct 26 from Seattle to Lisbon, returning Wed, Nov 11, priced at $744 found 7 hours ago
Delta
Tue, Jan 19 - Tue, Jan 26
SEA
Seattle
LIS
Lisbon
$745 Roundtrip, found 3 hours ago
$745
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Jan 19 from Seattle to Lisbon, returning Tue, Jan 26, priced at $745 found 3 hours ago
Lufthansa
Wed, Feb 24 - Wed, Mar 3
SEA
Seattle
LIS
Lisbon
$747 Roundtrip, found 7 hours ago
$747
Roundtrip
found 7 hours ago
Select Lufthansa flight, departing Wed, Feb 24 from Seattle to Lisbon, returning Wed, Mar 3, priced at $747 found 7 hours ago
American Airlines
Tue, Jan 19 - Tue, Jan 26
SEA
Seattle
LIS
Lisbon
$758 Roundtrip, found 3 hours ago
$758
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Tue, Jan 19 from Seattle to Lisbon, returning Tue, Jan 26, priced at $758 found 3 hours ago
British Airways
Sun, Jan 10 - Thu, Jan 28
SEA
Seattle
LIS
Lisbon
$759 Roundtrip, found 1 hour ago
$759
Roundtrip
found 1 hour ago
Select British Airways flight, departing Sun, Jan 10 from Seattle to Lisbon, returning Thu, Jan 28, priced at $759 found 1 hour ago
Virgin Atlantic
Tue, Jan 19 - Tue, Jan 26
SEA
Seattle
LIS
Lisbon
$766 Roundtrip, found 3 hours ago
$766
Roundtrip
found 3 hours ago
Select Virgin Atlantic flight, departing Tue, Jan 19 from Seattle to Lisbon, returning Tue, Jan 26, priced at $766 found 3 hours ago
Iberia
Mon, Oct 26 - Wed, Nov 11
SEA
Seattle
LIS
Lisbon
$777 Roundtrip, found 7 hours ago
$777
Roundtrip
found 7 hours ago
Select Iberia flight, departing Mon, Oct 26 from Seattle to Lisbon, returning Wed, Nov 11, priced at $777 found 7 hours ago

Alternative airports near Lisbon

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Humberto Delgado LIS. Cheapest option available. Flights from $1,155
LIS
Humberto Delgado
Cheapest
Flights from $1,155

What you need to know for your flight from Seattle - Tacoma Intl. to Humberto Delgado

Seattle (SEA) to Lisbon (LIS) at a glance

Embark on an exciting journey from Seattle (SEA) to Lisbon (LIS) with a selection of airlines offering this international long-haul route. Choose between full-service and budget carriers to discover the flight that aligns with your budget, schedule, and travel preferences as you delve into the iconic sights and neighborhoods of Lisbon. Below, you’ll find essential information for flights departing from Seattle-Tacoma International Airport (SEA) to Humberto Delgado Airport (LIS).

  • Fastest flight duration: around 12h 15m in-flight, plus roughly 3h 15m layover with one stop
  • Route distance: roughly 5,200 miles (8,370 km)
  • Flights per week: around 13 departures on average
  • Typical fares (one-way): economy tickets often range from $250–$940, depending on seasonality and how far ahead you book

Flights from Seattle - Tacoma International Airport (SEA) to Humberto Delgado Airport (LIS)

Based on recent travel bookings, here are the top airlines favored by travelers flying from Seattle to Lisbon, especially for one-stop and multi-stop flights. Common layovers include Heathrow Airport (LHR) with an average layover of about 2 hours and 30 minutes, Pearson International Airport (YYZ) at roughly 3 hours and 15 minutes, and Keflavik International Airport (KEF) with a 2-hour layover. These options allow you to tailor your journey based on price, total travel time, and cabin class to create your ideal itinerary.

  • United: This full-service airline provides one-stop journeys, typically charging one-way fares between $265 and $815. It represents around 19% of the departures on this route, with a flight duration of 12 hours and 15 minutes, culminating in a total travel time of about 15 hours and 30 minutes, including layovers.
  • British Airways: Another full-service option, British Airways offers one-stop flights, with one-way fares generally ranging from $250 to $1025. This carrier accounts for roughly 18% of the flights on this route, featuring an in-flight time of 12 hours and 15 minutes and a total journey time of approximately 15 hours and 30 minutes, factoring in layovers.
  • Air Canada: This full-service carrier provides both one-stop and multi-stop options, with one-way fares usually between $250 and $1025. Air Canada makes up about 11% of the departures on this route, offering a standard in-flight duration of 12 hours and 15 minutes, leading to a total travel time close to 15 hours and 30 minutes.
  • Delta: As a full-service provider, Delta offers one-stop service with one-way fares that typically range from $250 to $1395. It accounts for around 10% of the departures on this route, featuring an in-flight time of 12 hours and 15 minutes, while the overall journey time is about 15 hours and 30 minutes, including a layover.
  • Icelandair: This full-service airline presents one-stop and multi-stop travel options, with one-way fares typically between $250 and $1915. Representing about 7% of departures on this route, Icelandair provides a standard in-flight duration of 12 hours and 15 minutes, culminating in a total journey time of roughly 15 hours and 30 minutes.

Travelers have the option to enhance their journey from Seattle to Lisbon with upgraded seating. Leading airlines offering Business Class include Icelandair, American Airlines, and British Airways, providing exceptional service for a more enjoyable flying experience.

Best time to fly from Seattle (SEA) to Lisbon (LIS)

The most popular months for travelers flying from Seattle to Lisbon are March, April, and July, when peak temperatures in Lisbon reach up to 71.1°F in July. If you prefer quieter travel, consider January, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 54°F. For better deals, February usually offers the lowest average one-way fare around $430. Flight availability peaks in April, September, and December, with approximately 16 flights per week, making it easier to find convenient departure times.

  • Cheapest time to fly: February usually offers good deals with average one-way fare around $430, roughly 29% cheaper than the yearly average.
  • Another budget-friendly time to fly: January typically offers an average one-way fare of around $461.
  • Most flight options: April, September, and December have the highest number of flights from Seattle to Lisbon, with approximately 16 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January54.0°F (12.2°C)Low9$461
February54.5°F (12.5°C)Average10$430
March57.0°F (13.9°C)High13$490
April59.9°F (15.5°C)High16$591
May64.8°F (18.2°C)Low13$869
June68.2°F (20.1°C)Average13$1063
July71.1°F (21.7°C)High15$648
August72.0°F (22.2°C)Average12$605
September70.3°F (21.3°C)Average16$595
October66.9°F (19.4°C)Low13$520
November59.9°F (15.5°C)Average13$496
December55.9°F (13.3°C)Average16$603

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative routes from Seattle (SEA) to Lisbon (LIS)

  • Seattle to Lisbon (BFI-LIS): Located approximately 6 miles from Seattle - Tacoma International Airport (SEA), Boeing Field Airport (BFI) serves as a convenient option for travelers.
  • Seattle to Cascais (SEA-CAT): Cascais Airport (CAT) lies roughly 12 miles from Humberto Delgado Airport (LIS), providing easy access for those heading to Lisbon.

How to find the best prices for flights from Seattle (SEA) to Lisbon (LIS)

Getting some of the best deals on flights from Seattle to Lisbon is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking at least two months in advance, which aligns with when most travelers make their reservations. Evening departures from 6 PM to 12 AM often offer lower prices, while afternoon flights from 12 PM to 6 PM are the most popular. Additionally, flying on Saturday typically results in cheaper fares, although Wednesday is the most favored travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Lisbon hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Humberto Delgado Airport from Seattle - Tacoma International Airport

Lisbon welcomes travelers from Seattle with a range of transport options based on price, convenience, and proximity. For departures, Seattle - Tacoma International Airport is roughly a 20-minute drive (covering about 14 miles) from central Seattle. Here's how to reach Lisbon efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Lisbon, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from Humberto Delgado Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Humberto Delgado Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Humberto Delgado Airport, Lisbon Airport Station (a metro station) is located about 0.1 miles away on foot, while Oriente Bus Station (a bus station) and Roma-Areeiro Station (a train station) are both situated about 1.8 miles away by car, providing convenient transport options for travelers heading into the city.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) cost?
You can find cheap one-way flights from $236 and cheap return flights from $724 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) with Expedia. One-way flights typically cost between $418 and $3855, and return flights often range between $704 and $8403. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
The cheapest month to fly from SEA to LIS is February when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
Enter SEA to LIS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
Condor is one of the cheapest airlines offering connecting flights from Seattle, WA (SEA) to Lisbon (LIS), with round-trip tickets starting from around $1,389. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
The earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) typically departs at around 12:10 AM, operated by American Airlines. This seasonal service is active in March, allowing you to start your journey to Lisbon in the early hours. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Lisbon (LIS) are in the early morning, from 6am to 9am. About 29% of passengers prefer this time window. Many major carriers, including Delta, United and American Airlines, offer flights during this window. This timing works well because it allows you to start your day early and arrive in Lisbon with plenty of time to explore.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
A flight from SEA to LIS with a layover takes around 16 hours 50 minutes, with the route covering approximately 5,203 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
Business class seats are offered on the SEA to LIS route. Airlines that offer business class service on this route include:

  • British Airways
  • Turkish Airlines
  • Lufthansa
  • Delta Air Lines
  • United Airlines
  • Icelandair
  • Air Canada
  • Air France
  • Virgin Atlantic
  • Edelweiss Air

First class is available with United Airlines.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Lisbon from Seattle - Tacoma Intl. (SEA)?
From Seattle - Tacoma Intl. (SEA), you can fly into Humberto Delgado (LIS) to reach Lisbon. Some flights may connect through major hubs like O'Hare Intl. (ORD), Dallas-Fort Worth Intl. (DFW), Vancouver Intl. (YVR) before reaching Lisbon. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) Lisbon Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Lisbon (LIS-Humberto Delgado) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Humberto Delgado
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, Alaska Airlines, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$724
Distance
5202 mi

Book with confidence

Seattle to Lisbon Flights

The cheapest times to fly from Seattle to Lisbon

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Lisbon are during the month of February. You can find some of the cheapest flights from Seattle to Lisbon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Lisbon

Sunday is one of the best days to book for cheap flights from Seattle to Lisbon: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Lisbon

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Lisbon in 2026. You can also book with separate airlines for your outbound and return journeys, from $236 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Lisbon flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Lisbon airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Lisbon Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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