Find flights
When to book
Airlines
FAQs

Cheap flights from Seattle to Lisbon from C$ 434

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 19/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
17 Mar — 24 Mar1
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 February 2026.

Mon 13/46:40 p.m.
SEA
-
LIS
1 stop15h 10m
Delta
Wed 22/411:55 a.m.
LIS
-
SEA
1 stop36h 35m
Delta
Deal found 11/2C$ 663
Wed 11/118:00 a.m.
SEA
-
LIS
1 stop18h 15m
United Airlines
Tue 17/1111:20 a.m.
LIS
-
SEA
2 stops40h 50m
United Airlines
Deal found 11/2C$ 664
Tue 14/47:35 a.m.
SEA
-
LIS
2 stops26h 15m
Delta
Thu 23/45:00 a.m.
LIS
-
SEA
1 stop14h 45m
Delta
Deal found 13/2C$ 670
Tue 14/41:45 p.m.
SEA
-
LIS
1 stop21h 00m
KLM
Tue 28/47:45 p.m.
LIS
-
SEA
1 stop24h 00m
KLM
Deal found 12/2C$ 671
Tue 21/46:40 p.m.
SEA
-
LIS
1 stop15h 10m
Delta
Sat 2/55:35 a.m.
LIS
-
SEA
1 stop20h 04m
Delta
Deal found 12/2C$ 673
Thu 19/111:40 p.m.
SEA
-
LIS
1 stop13h 40m
Delta
Thu 3/125:30 a.m.
LIS
-
SEA
1 stop13h 55m
Delta
Deal found 13/2C$ 674
Tue 14/410:48 a.m.
SEA
-
LIS
2 stops27h 57m
United Airlines
Tue 21/411:25 a.m.
LIS
-
SEA
2 stops41h 28m
United Airlines
Deal found 11/2C$ 675
Mon 23/28:17 a.m.
SEA
-
LIS
1 stop17h 58m
United Airlines
Tue 3/311:20 a.m.
LIS
-
SEA
2 stops39h 43m
United Airlines
Deal found 14/2C$ 677
Mon 2/32:10 p.m.
SEA
-
LIS
1 stop17h 00m
Delta
Wed 11/35:00 a.m.
LIS
-
SEA
1 stop14h 35m
Delta
Deal found 13/2C$ 678
Mon 23/37:15 a.m.
SEA
-
LIS
2 stops20h 20m
Delta
Tue 31/35:00 a.m.
LIS
-
SEA
1 stop14h 45m
Delta
Deal found 12/2C$ 679
Sun 19/411:59 p.m.
SEA
-
LIS
2 stops26h 31m
United Airlines
Sun 26/47:25 a.m.
LIS
-
SEA
2 stops23h 12m
United Airlines
Deal found 14/2C$ 682
Tue 14/411:45 a.m.
SEA
-
LIS
2 stops19h 10m
Delta
Mon 27/45:00 a.m.
LIS
-
SEA
2 stops20h 16m
Delta
Deal found 12/2C$ 683

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 February 2026.

Round-trip from

C$ 663

One-way from

C$ 434

Popular in

June

Cheapest in

January

Average price

C$ 762
Delta
  • Delta
  • 14/4-22/4
  • 2 total stops
  • 51h 45m total
  • Seattle to Lisbon
Search Deals
British Airways
  • British Airways
  • 19/7
  • 1 total stop
  • 18h 45m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 501 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 72 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 2026.
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 14/4

6:40 p.m.-5:50 p.m.

1 stop15h 10m

Lisbon Humberto Delgado

Tue 21/4

5:00 a.m.-11:45 a.m.

1 stop14h 45m

C$ 663

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 14/4

1:45 p.m.-5:50 p.m.

2 stops20h 05m

Lisbon Humberto Delgado

Wed 22/4

11:55 a.m.-4:30 p.m.

1 stop36h 35m

C$ 670

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 7/4

7:20 a.m.-8:50 a.m.

2 stops17h 30m

Lisbon Humberto Delgado

Wed 15/4

5:00 a.m.-11:45 a.m.

1 stop14h 45m

C$ 670

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 13/4

11:15 p.m.-8:00 a.m.

2 stops24h 45m

Lisbon Humberto Delgado

Mon 20/4

11:55 a.m.-11:45 a.m.

1 stop31h 50m

C$ 670

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 23/4

7:15 a.m.-11:15 a.m.

2 stops20h 00m

Lisbon Humberto Delgado

Mon 27/4

5:00 a.m.-11:45 a.m.

1 stop14h 45m

C$ 670

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 14/4

11:40 a.m.-5:50 p.m.

2 stops22h 10m

Lisbon Humberto Delgado

Thu 23/4

5:00 a.m.-11:45 a.m.

1 stop14h 45m

C$ 670

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 2/3

2:10 p.m.-5:30 p.m.

1 stop19h 20m

Lisbon Humberto Delgado

Tue 10/3

4:50 p.m.-12:35 p.m.

1 stop26h 45m

C$ 678

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 21/4

6:40 p.m.-5:50 p.m.

1 stop15h 10m

Lisbon Humberto Delgado

Tue 28/4

5:00 a.m.-6:26 p.m.

2 stops21h 26m

C$ 678

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 14/4

6:40 p.m.-5:50 p.m.

1 stop15h 10m

Lisbon Humberto Delgado

Mon 27/4

5:00 a.m.-7:03 p.m.

2 stops22h 03m

C$ 678

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 18/4

11:59 p.m.-10:30 a.m.

2 stops26h 31m

Lisbon Humberto Delgado

Mon 27/4

5:05 a.m.-7:00 p.m.

2 stops21h 55m

C$ 682

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 21 results
1
2
3

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 13 February 2026.

Booking 81 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$ 472). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,381). 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.

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 February 2026.
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
4,216 reviews
Check prices

Boarding

7.3

Comfort

7.3

Crew

7.8

Overall

7.3

Food

7.5

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Muhammad,Jan 2026

ORD - DFW

Great, customer service agent at O’hare was able to change the flight due to snow storm. Thank you
Turkish Airlines
7.3
Good
4,216 reviews
Turkish Airlines
7.3
Good
4,216 reviews
Check prices

Boarding

7.3

Comfort

7.3

Crew

7.8

Overall

7.3

Food

7.5

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Muhammad,Jan 2026

ORD - DFW

Great, customer service agent at O’hare was able to change the flight due to snow storm. Thank you
British Airways
6.7
Okay
7,741 reviews
Turkish Airlines
7.3
Good
4,216 reviews
Check prices

Boarding

7.3

Comfort

7.3

Crew

7.8

Overall

7.3

Food

7.5

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Muhammad,Jan 2026

ORD - DFW

Great, customer service agent at O’hare was able to change the flight due to snow storm. Thank you

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 15h 10m. Delta provides one of the quickest options available for as low as C$ 663. Seattle and Lisbon are separated by a distance of 8367 km.

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

    Currently priced at C$ 719, 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$ 926. These flights start at 35% 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$ 472). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,381). 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
Fátima
Costa da Caparica
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 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapestC$ 719AverageC$ 756FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights
British AirwaysCheapestC$ 926AverageC$ 1,363FlexibilityNo 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.