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Cheap flights from Seattle to Lisbon from C$ 418

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 14/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 6 November 2025.

Round-trip from

C$ 700

One-way from

C$ 418

Popular in

June

Cheapest in

January

Average price

C$ 1,031
United Airlines
  • United Airlines
  • 16/3-26/3
  • 2 total stops
  • 32h 00m total
  • Seattle to Lisbon
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14/3
  • 14/3
  • 1 total stop
  • 26h 17m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 430 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 73 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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Find 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 6 November 2025.

Mon 29/128:00 a.m.SEA - LIS
1 stop18h 15mUnited Airlines
Mon 12/111:20 a.m.LIS - SEA
1 stop18h 56mUnited Airlines
Deal found 6/11C$ 708
Sun 16/115:05 a.m.SEA - LIS
2 stops21h 10mUnited Airlines
Tue 25/1111:55 a.m.LIS - SEA
2 stops30h 40mUnited Airlines
Deal found 6/11C$ 712
Thu 4/128:10 a.m.SEA - LIS
1 stop18h 05mUnited Airlines
Thu 18/1210:55 a.m.LIS - SEA
2 stops22h 04mUnited Airlines
Deal found 6/11C$ 714
Mon 17/1112:41 p.m.SEA - LIS
3 stops36h 39mUnited Airlines
Wed 26/116:10 a.m.LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 4/11C$ 718
Mon 10/1111:20 p.m.SEA - LIS
1 stop25h 45mMultiple Airlines
Tue 25/1111:05 a.m.LIS - SEA
1 stop19h 05mMultiple Airlines
Deal found 5/11C$ 734
Sat 15/1111:59 p.m.SEA - LIS
2 stops24h 11mUnited Airlines
Mon 15/125:00 a.m.LIS - SEA
2 stops43h 07mUnited Airlines
Deal found 5/11C$ 739
Tue 18/117:00 a.m.SEA - LIS
2 stops20h 35mLufthansa
Thu 27/1112:25 p.m.LIS - SEA
1 stop31h 45mLufthansa
Deal found 6/11C$ 745
Sun 16/118:00 a.m.SEA - LIS
1 stop18h 15mUnited Airlines
Thu 27/1110:15 a.m.LIS - SEA
2 stops33h 24mUnited Airlines
Deal found 6/11C$ 748
Sun 16/118:00 a.m.SEA - LIS
1 stop18h 15mUnited Airlines
Mon 24/115:00 a.m.LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 6/11C$ 756
Mon 17/115:05 a.m.SEA - LIS
2 stops19h 05mUnited Airlines
Sun 7/1210:50 a.m.LIS - SEA
2 stops39h 42mUnited Airlines
Deal found 6/11C$ 780
Mon 17/115:20 p.m.SEA - LIS
2 stops32h 55mMultiple Airlines
Sun 7/1210:50 a.m.LIS - SEA
2 stops40h 26mMultiple Airlines
Deal found 6/11C$ 789

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 6 November 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

Mon 16/3

3:00 p.m.-2:50 p.m.

1 stop16h 50m

Lisbon Humberto Delgado

Thu 26/3

5:00 a.m.-1:10 p.m.

1 stop15h 10m

C$ 700

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 21/4

10:55 a.m.-3:45 p.m.

2 stops20h 50m

Lisbon Humberto Delgado

Sat 2/5

7:00 a.m.-10:16 p.m.

2 stops23h 16m

C$ 703

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 16/3

3:00 p.m.-2:50 p.m.

1 stop16h 50m

Lisbon Humberto Delgado

Wed 25/3

6:10 a.m.-2:20 p.m.

1 stop15h 10m

C$ 703

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 11/1

7:00 a.m.-11:35 a.m.

2 stops20h 35m

Lisbon Humberto Delgado

Fri 23/1

5:00 a.m.-7:16 p.m.

2 stops22h 16m

C$ 708

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 15/3

4:10 p.m.-1:20 p.m.

1 stop14h 10m

Lisbon Humberto Delgado

Thu 26/3

11:55 a.m.-12:20 p.m.

2 stops31h 25m

C$ 708

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 16/11

8:00 a.m.-10:15 a.m.

1 stop18h 15m

Lisbon Humberto Delgado

Tue 25/11

11:55 a.m.-1:54 p.m.

2 stops33h 59m

C$ 712

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 8/1

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

2 stops15h 30m

Lisbon Humberto Delgado

Tue 20/1

10:15 a.m.-9:15 p.m.

2 stops19h 00m

C$ 719

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 15/3

4:10 p.m.-1:20 p.m.

1 stop14h 10m

Lisbon Humberto Delgado

Wed 25/3

11:55 a.m.-1:24 p.m.

2 stops32h 29m

C$ 721

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 15/3

4:10 p.m.-3:05 p.m.

2 stops15h 55m

Lisbon Humberto Delgado

Thu 26/3

5:00 a.m.-1:10 p.m.

1 stop15h 10m

C$ 729

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 14/3

11:38 p.m.-8:55 a.m.

1 stop26h 17m

C$ 418

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 15 results
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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 31 October 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$ 499). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,436). 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 6 November 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.

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 6 November 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
4,031 reviews
Check prices

Food

7.4

Crew

7.7

Comfort

7.3

Entertainment

7.4

Overall

7.3

Boarding

7.3

Reviews

1 / 20
6.0
Good

Christina,Sep 2025

DTW - IST

Crew was fine but the plane seemed smaller like the seats were very crammed in for an international flight. I’m a small person and it felt suffocating to me.
Turkish Airlines
7.3
Good
4,031 reviews
Turkish Airlines
7.3
Good
4,031 reviews
Check prices

Food

7.4

Crew

7.7

Comfort

7.3

Entertainment

7.4

Overall

7.3

Boarding

7.3

Reviews

1 / 20
6.0
Good

Christina,Sep 2025

DTW - IST

Crew was fine but the plane seemed smaller like the seats were very crammed in for an international flight. I’m a small person and it felt suffocating to me.
British Airways
6.7
Okay
7,496 reviews
Turkish Airlines
7.3
Good
4,031 reviews
Check prices

Food

7.4

Crew

7.7

Comfort

7.3

Entertainment

7.4

Overall

7.3

Boarding

7.3

Reviews

1 / 20
6.0
Good

Christina,Sep 2025

DTW - IST

Crew was fine but the plane seemed smaller like the seats were very crammed in for an international flight. I’m a small person and it felt suffocating to me.

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 16h 50m. United Airlines provides one of the quickest options available for as low as C$ 700. 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$ 745, 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$ 960. These flights start at 42% 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$ 499). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,436). 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
Sintra
Costa da Caparica
Óbidos
Fátima
Setúbal

Browse thousands of different options on Cheapflights for your next trip

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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 6 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapestC$ 745AverageC$ 783FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights
British AirwaysCheapestC$ 960AverageC$ 1,448FlexibilityNo 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.

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