Find flights
When to book
Airlines
FAQs

Cheap flights from Seattle to Lisbon from C$ 438

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 16/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
14 Jan — 21 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Lisbon

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Lisbon
Explore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 December 2025.

Fri 26/1211:04 p.m.SEA - LIS
1 stop26h 01mMultiple Airlines
Sat 24/110:40 a.m.LIS - SEA
1 stop19h 27mMultiple Airlines
Deal found 13/12C$ 856
Wed 31/129:35 a.m.SEA - LIS
2 stops21h 35mDelta
Sun 11/15:00 a.m.LIS - SEA
1 stop14h 50mDelta
Deal found 15/12C$ 936
Tue 16/127:35 a.m.SEA - LIS
1 stop16h 25mDelta
Wed 24/125:30 a.m.LIS - SEA
2 stops19h 03mDelta
Deal found 14/12C$ 983
Fri 26/123:05 p.m.SEA - LIS
1 stop34h 25mKLM
Sat 10/111:25 a.m.LIS - SEA
1 stop32h 25mKLM
Deal found 14/12C$ 1,007
Wed 31/125:02 a.m.SEA - LIS
2 stops21h 13mUnited Airlines
Sun 11/110:15 a.m.LIS - SEA
2 stops33h 17mUnited Airlines
Deal found 14/12C$ 1,041
Tue 16/127:35 a.m.SEA - LIS
1 stop16h 25mVirgin Atlantic
Mon 22/1211:15 a.m.LIS - SEA
2 stops20h 16mVirgin Atlantic
Deal found 14/12C$ 1,126
Tue 16/121:25 p.m.SEA - LIS
1 stop17h 20mMultiple Airlines
Wed 24/1211:05 a.m.LIS - SEA
1 stop16h 27mMultiple Airlines
Deal found 15/12C$ 1,330
Thu 18/125:02 a.m.SEA - LIS
2 stops19h 08mUnited Airlines
Fri 2/16:10 a.m.LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 14/12C$ 1,488
Sat 27/1211:59 p.m.SEA - LIS
2 stops26h 16mUnited Airlines
Sat 10/110:15 a.m.LIS - SEA
2 stops31h 40mUnited Airlines
Deal found 15/12C$ 1,490
Thu 18/125:02 a.m.SEA - LIS
2 stops21h 13mUnited Airlines
Mon 22/1211:55 a.m.LIS - SEA
2 stops43h 17mUnited Airlines
Deal found 14/12C$ 1,505

Find flight deals from Seattle to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 15 December 2025.

Round-trip from

C$ 665

One-way from

C$ 438

Popular in

June

Cheapest in

January

Average price

C$ 1,524
Icelandair
  • Icelandair
  • 11/2-19/2
  • 2 total stops
  • 49h 25m total
  • Seattle to Lisbon
Search Deals
16/1
  • 16/1
  • 3 total stops
  • 37h 47m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 474 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 75 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Lisbon 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 629,999 searches. Data last updated 15 December 2025.
Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

Fly from

Seattle

Fly to

Lisbon

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 13/1

8:40 a.m.-8:10 a.m.

2 stops15h 30m

Lisbon Humberto Delgado

Mon 2/2

10:15 a.m.-10:43 p.m.

3 stops20h 28m

C$ 704

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 10/1

12:40 p.m.-9:20 a.m.

3 stops36h 40m

Lisbon Humberto Delgado

Sun 18/1

10:50 a.m.-10:43 p.m.

2 stops43h 53m

C$ 716

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 10/1

3:30 p.m.-8:10 a.m.

2 stops32h 40m

Lisbon Humberto Delgado

Thu 22/1

10:15 a.m.-10:43 p.m.

3 stops20h 28m

C$ 730

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 22/3

7:20 a.m.-8:55 a.m.

1 stop18h 35m

Lisbon Humberto Delgado

Sun 29/3

7:45 p.m.-4:30 p.m.

1 stop28h 45m

C$ 774

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 13/2

11:18 p.m.-9:05 a.m.

1 stop25h 47m

Lisbon Humberto Delgado

Sun 22/2

11:05 a.m.-10:18 p.m.

1 stop19h 13m

C$ 841

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 10/1

6:12 a.m.-9:05 a.m.

1 stop18h 53m

Lisbon Humberto Delgado

Sat 17/1

10:40 a.m.-10:07 p.m.

1 stop19h 27m

C$ 847

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 26/12

11:04 p.m.-9:05 a.m.

1 stop26h 01m

Lisbon Humberto Delgado

Sat 24/1

10:40 a.m.-10:07 p.m.

1 stop19h 27m

C$ 856

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 31/12

7:10 a.m.-11:20 a.m.

2 stops20h 10m

Lisbon Humberto Delgado

Sun 11/1

5:00 a.m.-11:50 a.m.

1 stop14h 50m

C$ 936

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 1/5

7:15 a.m.-9:20 a.m.

1 stop18h 05m

Lisbon Humberto Delgado

Tue 5/5

5:05 a.m.-12:20 p.m.

1 stop15h 15m

C$ 967

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 14/2

9:00 a.m.-10:40 p.m.

2 stops29h 40m

Lisbon Humberto Delgado

Fri 20/2

7:50 p.m.-7:16 p.m.

2 stops31h 26m

C$ 979

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/12

Showing 1-10 of 18 results
1
2

Best time to book a flight from Seattle to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Seattle 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 Seattle to Lisbon

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Lisbon. Price data was last updated on 12 December 2025.

Booking 27 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Lisbon. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to Lisbon?

Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of C$ 479). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,402). 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.

What is the cheapest time of day to fly from SEA to LIS?

Find hourly flight availability from Seattle to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 December 2025.

When flying from Seattle to Lisbon, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 35% versus a flight at noon.

How much does it cost to fly round-trip from Seattle to Lisbon?

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. 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 Lisbon. Reviews last updated 15 December 2025.
See what other customers who have flown with Turkish Airlines and British Airways from Seattle to Lisbon have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Turkish Airlines
7.3
Good
4,100 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

7.4

Comfort

7.3

Overall

7.3

Food

7.4

Reviews

1 / 20
6.0
Good

Chandra,Nov 2025

ATL - IST

TV was not available in Indigo from Istanbul to Delhi. Seat was not moving back. It was jammed.
Turkish Airlines
7.3
Good
4,100 reviews
Turkish Airlines
7.3
Good
4,100 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

7.4

Comfort

7.3

Overall

7.3

Food

7.4

Reviews

1 / 20
6.0
Good

Chandra,Nov 2025

ATL - IST

TV was not available in Indigo from Istanbul to Delhi. Seat was not moving back. It was jammed.
British Airways
6.7
Okay
7,578 reviews
Turkish Airlines
7.3
Good
4,100 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

7.4

Comfort

7.3

Overall

7.3

Food

7.4

Reviews

1 / 20
6.0
Good

Chandra,Nov 2025

ATL - IST

TV was not available in Indigo from Istanbul to Delhi. Seat was not moving back. It was jammed.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Lisbon?

    A quick flight from Seattle to Lisbon can take about 19h 10m. United Airlines provides one of the quickest options available for as low as C$ 676. Seattle and Lisbon are separated by a distance of 8367 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Lisbon round-trip?

    Currently priced at C$ 727, Turkish Airlines will fly you from Seattle to Lisbon and back. In addition to Turkish Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on British Airways for as low as C$ 937. These flights start at 39% lower than the current average price 3 months from now.

  • Can I find deals for flights from Seattle to Lisbon that include hotel bookings?

    Yes. In addition to deals on Seattle to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Lisbon.

  • Can I find deals for business class flights from Seattle to Lisbon?

    Yes. Cheapflights offers flight deals from Seattle to Lisbon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Lisbon?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of C$ 479). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,402). 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.

See more FAQs

Travelling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Costa da Caparica
Fátima
Sintra
Óbidos
Setúbal

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Seattle to Lisbon

Discover the top 2 airlines that operate flights from Seattle to Lisbon. 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 629,999 searches. Data last updated 15 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapestC$ 727AverageC$ 764FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights
British AirwaysCheapestC$ 937AverageC$ 1,378FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Lisbon?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Lisbon from Seattle today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Seattle to Lisbon?

Cheapflights simply makes it quick and affordable to book flights from Seattle to Lisbon by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Seattle to Lisbon with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Lisbon flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Lisbon become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Lisbon flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.