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Cheap flights from Seattle to Lisbon from C$ 493

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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 15 September 2025.

Round-trip from

C$ 851

One-way from

C$ 493

Popular in

June

Cheapest in

January

Average price

C$ 1,217
Delta
  • Delta
  • 17/10-30/10
  • 2 total stops
  • 34h 15m total
  • Seattle to Lisbon
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United Airlines
  • United Airlines
  • 10/1
  • 3 total stops
  • 19h 10m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 366 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 67 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Seattle to Lisbon

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 September 2025.

Fri 17/101:30 p.m.SEA - LIS
1 stop20h 20mDelta
Thu 30/105:30 a.m.LIS - SEA
1 stop13h 55mDelta
Deal found 15/9C$ 851
Thu 30/1011:25 a.m.SEA - LIS
2 stops20h 45mDelta
Sat 8/115:30 a.m.LIS - SEA
2 stops19h 02mDelta
Deal found 14/9C$ 891
Mon 17/116:50 p.m.SEA - LIS
1 stop31h 00mBritish Airways
Fri 28/117:05 a.m.LIS - SEA
1 stop17h 50mBritish Airways
Deal found 13/9C$ 895
Sun 16/118:15 a.m.SEA - LIS
1 stop17h 05mUnited Airlines
Mon 1/1211:20 a.m.LIS - SEA
1 stop18h 56mUnited Airlines
Deal found 13/9C$ 897
Thu 20/1111:27 a.m.SEA - LIS
1 stop13h 28mDelta
Thu 27/1110:00 a.m.LIS - SEA
1 stop18h 06mDelta
Deal found 13/9C$ 898
Thu 20/1111:27 a.m.SEA - LIS
1 stop13h 28mDelta
Tue 2/1210:00 a.m.LIS - SEA
1 stop32h 25mDelta
Deal found 13/9C$ 905
Thu 16/102:20 p.m.SEA - LIS
1 stop23h 45mLufthansa
Fri 24/105:05 a.m.LIS - SEA
1 stop14h 50mLufthansa
Deal found 14/9C$ 906
Sun 19/107:19 a.m.SEA - LIS
1 stop16h 41mDelta
Mon 27/105:30 a.m.LIS - SEA
2 stops20h 30mDelta
Deal found 14/9C$ 915
Thu 20/117:30 a.m.SEA - LIS
1 stop16h 30mDelta
Tue 25/1111:15 a.m.LIS - SEA
1 stop19h 10mDelta
Deal found 14/9C$ 919
Wed 1/109:40 a.m.SEA - LIS
2 stops21h 10mDelta
Thu 9/1010:00 a.m.LIS - SEA
1 stop18h 16mDelta
Deal found 15/9C$ 945
Wed 15/101:00 p.m.SEA - LIS
3 stops36h 20mUnited Airlines
Sat 8/115:00 a.m.LIS - SEA
2 stops23h 51mUnited Airlines
Deal found 14/9C$ 950

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 September 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

Sun 16/11

6:50 p.m.-2:55 p.m.

1 stop36h 05m

Lisbon Humberto Delgado

Fri 28/11

7:05 a.m.-4:55 p.m.

1 stop17h 50m

C$ 895

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 28/2

7:20 a.m.-8:00 a.m.

1 stop16h 40m

Lisbon Humberto Delgado

Fri 6/3

12:20 p.m.-11:25 a.m.

1 stop31h 05m

C$ 902

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 20/11

11:27 a.m.-8:55 a.m.

1 stop13h 28m

Lisbon Humberto Delgado

Tue 2/12

10:00 a.m.-10:25 a.m.

1 stop32h 25m

C$ 905

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 20/11

11:27 a.m.-8:55 a.m.

1 stop13h 28m

Lisbon Humberto Delgado

Wed 26/11

10:00 a.m.-8:06 p.m.

1 stop18h 06m

C$ 919

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 19/10

9:46 a.m.-2:50 p.m.

2 stops21h 04m

Lisbon Humberto Delgado

Mon 27/10

5:30 a.m.-7:00 p.m.

2 stops20h 30m

C$ 941

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 1/10

9:40 a.m.-2:50 p.m.

2 stops21h 10m

Lisbon Humberto Delgado

Thu 9/10

10:00 a.m.-8:16 p.m.

1 stop18h 16m

C$ 945

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 8/2

5:00 a.m.-8:10 a.m.

3 stops19h 10m

Lisbon Humberto Delgado

Sun 22/2

10:50 a.m.-12:59 a.m.

2 stops22h 09m

C$ 948

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 21/2

8:17 a.m.-10:15 a.m.

1 stop17h 58m

Lisbon Humberto Delgado

Sat 28/2

5:00 a.m.-12:10 p.m.

1 stop15h 10m

C$ 949

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 1/10

9:40 a.m.-2:50 p.m.

2 stops21h 10m

Lisbon Humberto Delgado

Tue 14/10

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

1 stop14h 50m

C$ 973

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 10/1

5:00 a.m.-8:10 a.m.

3 stops19h 10m

C$ 493

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

Showing 1-10 of 19 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 12 September 2025.

Booking 29 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$ 482). Flying from Seattle to Lisbon in July is currently the most expensive (average of C$ 779). 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 September 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 6% 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 15 September 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
3,968 reviews
Check prices

Crew

7.7

Comfort

7.3

Overall

7.3

Entertainment

7.4

Boarding

7.3

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Brian,Jul 2025

SEA - IST

Horrible check-in experience in Seattle. Was actually yelled at by a customer service rep and then he intentionally would put us in the back row to make sure our seats would not recline. When I complained to customer service they told me they did not find any issues with how we were treated. The sinks did not drain in the bathroom during the flight and my in-flight entertainment never worked during a 12 hour flight. They said they would reset 3 times but never did. Would never fly them again.
Turkish Airlines
7.3
Good
3,968 reviews
Turkish Airlines
7.3
Good
3,968 reviews
Check prices

Crew

7.7

Comfort

7.3

Overall

7.3

Entertainment

7.4

Boarding

7.3

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Brian,Jul 2025

SEA - IST

Horrible check-in experience in Seattle. Was actually yelled at by a customer service rep and then he intentionally would put us in the back row to make sure our seats would not recline. When I complained to customer service they told me they did not find any issues with how we were treated. The sinks did not drain in the bathroom during the flight and my in-flight entertainment never worked during a 12 hour flight. They said they would reset 3 times but never did. Would never fly them again.
British Airways
6.7
Okay
7,361 reviews
Turkish Airlines
7.3
Good
3,968 reviews
Check prices

Crew

7.7

Comfort

7.3

Overall

7.3

Entertainment

7.4

Boarding

7.3

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Brian,Jul 2025

SEA - IST

Horrible check-in experience in Seattle. Was actually yelled at by a customer service rep and then he intentionally would put us in the back row to make sure our seats would not recline. When I complained to customer service they told me they did not find any issues with how we were treated. The sinks did not drain in the bathroom during the flight and my in-flight entertainment never worked during a 12 hour flight. They said they would reset 3 times but never did. Would never fly them again.

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 40m. British Airways provides one of the quickest options available for as low as C$ 902. 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$ 729, 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$ 940. These flights start at 44% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Seattle to Lisbon one-way?

    The cheapest airlines for a one-way flight from Seattle to Lisbon are Lufthansa (C$ 499), Icelandair (C$ 501), and United Airlines (C$ 511).

  • 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$ 482). Flying from Seattle to Lisbon in July is currently the most expensive (average of C$ 779). 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
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 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapestC$ 729AverageC$ 767FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights
British AirwaysCheapestC$ 940AverageC$ 1,418FlexibilityNo 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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