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Cheap flights from Seattle to Lisbon from C$ 373

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
7 Feb — 14 Feb1
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 8 January 2026.

Round-trip from

C$ 668

One-way from

C$ 373

Popular in

June

Cheapest in

January

Average price

C$ 697
United Airlines
  • United Airlines
  • 8/3-19/3
  • 4 total stops
  • 68h 25m total
  • Seattle to Lisbon
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American Airlines
  • American Airlines
  • 4/5
  • 1 total stop
  • 18h 50m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (C$ 534 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease (C$ 84 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 8 January 2026.

Fri 17/41:35 p.m.SEA - LIS
1 stop18h 00mBritish Airways
Fri 24/411:05 a.m.LIS - SEA
1 stop15h 20mBritish Airways
Deal found 7/1C$ 670
Fri 6/27:00 a.m.SEA - LIS
2 stops20h 30mUnited Airlines
Fri 13/210:55 a.m.LIS - SEA
2 stops39h 08mUnited Airlines
Deal found 7/1C$ 673
Thu 5/37:30 a.m.SEA - LIS
1 stop16h 30mDelta
Thu 19/35:00 a.m.LIS - SEA
1 stop14h 35mDelta
Deal found 7/1C$ 675
Fri 6/311:59 p.m.SEA - LIS
2 stops24h 56mUnited Airlines
Fri 20/35:00 a.m.LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 7/1C$ 676
Tue 21/47:00 a.m.SEA - LIS
2 stops17h 20mUnited Airlines
Mon 27/45:05 a.m.LIS - SEA
1 stop15h 15mUnited Airlines
Deal found 7/1C$ 677
Wed 4/35:30 a.m.SEA - LIS
2 stops21h 50mDelta
Thu 19/35:00 a.m.LIS - SEA
1 stop14h 35mDelta
Deal found 7/1C$ 680
Sat 21/21:40 p.m.SEA - LIS
1 stop19h 50mDelta
Sat 28/25:30 a.m.LIS - SEA
1 stop13h 55mDelta
Deal found 7/1C$ 681
Wed 7/18:40 a.m.SEA - LIS
2 stops15h 30mUnited Airlines
Thu 15/15:00 a.m.LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 7/1C$ 683
Fri 17/411:59 p.m.SEA - LIS
2 stops26h 36mUnited Airlines
Mon 27/45:05 a.m.LIS - SEA
1 stop15h 15mUnited Airlines
Deal found 7/1C$ 684
Tue 21/47:00 a.m.SEA - LIS
2 stops17h 20mUnited Airlines
Tue 28/41:00 p.m.LIS - SEA
2 stops35h 37mUnited Airlines
Deal found 7/1C$ 687

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 8 January 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

Sun 19/4

8:20 p.m.-11:05 p.m.

1 stop18h 45m

Lisbon Humberto Delgado

Sun 26/4

11:00 a.m.-6:25 p.m.

1 stop15h 25m

C$ 672

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 19/4

8:20 p.m.-11:05 p.m.

1 stop18h 45m

Lisbon Humberto Delgado

Sat 25/4

6:55 p.m.-11:35 a.m.

1 stop24h 40m

C$ 672

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 18/4

1:35 p.m.-4:20 p.m.

1 stop18h 45m

Lisbon Humberto Delgado

Mon 27/4

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

1 stop32h 35m

C$ 672

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 19/2

5:00 a.m.-10:15 a.m.

2 stops21h 15m

Lisbon Humberto Delgado

Fri 27/2

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

2 stops20h 28m

C$ 673

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 4/3

5:30 a.m.-11:20 a.m.

2 stops21h 50m

Lisbon Humberto Delgado

Thu 19/3

5:00 a.m.-12:35 p.m.

1 stop14h 35m

C$ 680

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 9/2

7:00 a.m.-8:10 a.m.

2 stops17h 10m

Lisbon Humberto Delgado

Mon 23/2

11:55 a.m.-6:03 p.m.

3 stops38h 08m

C$ 695

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 23/1

8:10 a.m.-9:20 a.m.

1 stop17h 10m

Lisbon Humberto Delgado

Fri 30/1

6:10 a.m.-1:20 p.m.

1 stop15h 10m

C$ 701

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 10/3

11:45 a.m.-3:10 p.m.

2 stops20h 25m

Lisbon Humberto Delgado

Fri 20/3

5:30 a.m.-7:05 p.m.

2 stops20h 35m

C$ 702

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 28/2

5:30 a.m.-11:20 a.m.

2 stops21h 50m

Lisbon Humberto Delgado

Fri 20/3

5:30 a.m.-12:03 a.m.

2 stops25h 33m

C$ 702

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 1/3

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

2 stops24h 45m

Lisbon Humberto Delgado

Fri 20/3

5:30 a.m.-4:47 p.m.

2 stops18h 17m

C$ 702

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 20 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 2 January 2026.

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$ 481). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,424). 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 8 January 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
4,154 reviews
Check prices

Comfort

7.3

Entertainment

7.4

Boarding

7.3

Crew

7.8

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
4,154 reviews
Turkish Airlines
7.3
Good
4,154 reviews
Check prices

Comfort

7.3

Entertainment

7.4

Boarding

7.3

Crew

7.8

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
7,659 reviews
Turkish Airlines
7.3
Good
4,154 reviews
Check prices

Comfort

7.3

Entertainment

7.4

Boarding

7.3

Crew

7.8

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 18h. British Airways provides one of the quickest options available for as low as C$ 670. 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$ 730, 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 37% 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$ 481). Flying from Seattle to Lisbon in June is currently the most expensive (average of C$ 1,424). 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

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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 8 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapestC$ 730AverageC$ 767FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights
British AirwaysCheapestC$ 940AverageC$ 1,384FlexibilityNo 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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