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Cheap flights from Seattle to Lisbon from £268

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
3 Sep — 10 Sep1
1 adult

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 29 August 2025.

Round-trip from

£485

One-way from

£268

Popular in

June

Cheapest in

February

Average price

£701
Delta
  • Delta
  • 31/10-15/11
  • 3 total stops
  • 40h 52m total
  • Seattle to Lisbon
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United Airlines
  • United Airlines
  • 14/10
  • 1 total stop
  • 18h 05m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£103 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).
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Average for round-trip flights in August 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 29 August 2025.

Tue 21/1007:00SEA - LIS
2 stops20h 05mUnited Airlines
Wed 29/1006:10LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 28/8£485
Mon 13/1012:00SEA - LIS
1 stop15h 05mUnited Airlines
Wed 22/1010:25LIS - SEA
1 stop16h 06mUnited Airlines
Deal found 28/8£486
Sat 1/1106:00SEA - LIS
2 stops20h 00mDelta
Sat 8/1110:00LIS - SEA
2 stops21h 54mDelta
Deal found 27/8£489
Sun 2/1105:00SEA - LIS
2 stops24h 55mScandinavian Airlines
Sun 16/1116:55LIS - SEA
2 stops37h 30mScandinavian Airlines
Deal found 28/8£489
Sun 19/1018:50SEA - LIS
1 stop19h 00mLufthansa
Mon 27/1015:55LIS - SEA
1 stop28h 15mLufthansa
Deal found 27/8£490
Thu 11/1207:00SEA - LIS
2 stops20h 35mLufthansa
Tue 30/1205:00LIS - SEA
1 stop15h 10mLufthansa
Deal found 28/8£491
Sat 1/1106:00SEA - LIS
2 stops20h 00mDelta
Fri 7/1111:25LIS - SEA
1 stop32h 20mDelta
Deal found 27/8£493
Sat 18/1014:20SEA - LIS
1 stop23h 45mLufthansa
Mon 27/1015:55LIS - SEA
1 stop28h 15mLufthansa
Deal found 27/8£494
Wed 8/1015:45SEA - LIS
1 stop21h 35mIcelandair
Thu 23/1022:20LIS - SEA
1 stop27h 30mIcelandair
Deal found 28/8£496
Sat 25/1009:46SEA - LIS
2 stops22h 24mDelta
Sat 1/1105:30LIS - SEA
2 stops20h 30mDelta
Deal found 29/8£497
Mon 13/1013:30SEA - LIS
1 stop25h 40mBritish Airways
Mon 20/1018:45LIS - SEA
1 stop24h 25mBritish Airways
Deal found 28/8£497
Sun 7/1208:15SEA - LIS
1 stop17h 05mUnited Airlines
Wed 31/1211:00LIS - SEA
1 stop18h 56mUnited Airlines
Deal found 27/8£498

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 29 August 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

Fri 31/10

11:43-15:10

2 stops20h 27m

Lisbon Humberto Delgado

Sat 15/11

10:00-22:25

1 stop20h 25m

£485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 21/10

07:00-11:05

2 stops20h 05m

Lisbon Humberto Delgado

Wed 29/10

06:10-14:20

1 stop15h 10m

£485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 23/10

13:12-10:30

1 stop13h 18m

Lisbon Humberto Delgado

Thu 30/10

11:55-20:54

1 stop15h 59m

£485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 24/10

07:00-11:05

2 stops20h 05m

Lisbon Humberto Delgado

Wed 29/10

06:10-14:20

1 stop15h 10m

£485

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 24/10

07:30-11:05

1 stop19h 35m

Lisbon Humberto Delgado

Thu 30/10

11:55-20:54

1 stop15h 59m

£486

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 13/10

12:00-11:05

1 stop15h 05m

Lisbon Humberto Delgado

Wed 22/10

10:25-18:31

1 stop16h 06m

£486

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 20/10

07:30-11:05

1 stop19h 35m

Lisbon Humberto Delgado

Thu 30/10

11:55-20:54

1 stop15h 59m

£486

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 21/10

07:30-11:05

1 stop19h 35m

Lisbon Humberto Delgado

Thu 30/10

11:55-20:54

1 stop15h 59m

£486

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 9/12

14:00-22:50

1 stop24h 50m

Lisbon Humberto Delgado

Tue 30/12

05:00-12:10

1 stop15h 10m

£489

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 1/11

06:00-09:00

2 stops20h 00m

Lisbon Humberto Delgado

Sat 8/11

10:00-23:54

2 stops21h 54m

£489

Flights are sorted by cheapest return flights first.

Deals found on 29/8

Showing 1-10 of 21 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 return 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 return flight from Seattle to Lisbon. Price data was last updated on 22 August 2025.

The price you pay for your flight from Seattle to Lisbon may vary depending on when you book. For the best chance of a lower fare, look to book 29 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 £101). Flying from Seattle to Lisbon in August is currently the most expensive (average of £274). 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.

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?

    For as low as £485, Delta can have you in Lisbon from Seattle in 20h 05m. The distance from Seattle to Lisbon is about 5199 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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 holiday 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 £101). Flying from Seattle to Lisbon in August is currently the most expensive (average of £274). 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
Madeira
Setúbal
Oeiras
Fátima
Estoril
Almada
Beja
Sintra
Costa da Caparica
Óbidos
Nazaré
Sesimbra
Peniche

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Lisbon.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Lisbon, users can toggle the no change fees filter when performing a flight search.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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