Find flights
When to book
FAQs

Cheap flights from Seattle to Lisbon from £226

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
7 dic — 14 dic1
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 7 novembre 2025.

Round-trip from

£379

One-way from

£226

Popular in

June

Cheapest in

January

Average price

£558
United Airlines
  • United Airlines
  • 16/3-26/3
  • 2 total stops
  • 32h 00m total
  • Seattle to Lisbon
Search Deals
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 (£126 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 7 novembre 2025.

lun 17/1108:00SEA - LIS
2 stops16h 10mUnited Airlines
mer 26/1106:10LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 7/11£380
mer 3/1208:10SEA - LIS
1 stop18h 05mUnited Airlines
mer 10/1211:00LIS - SEA
2 stops32h 45mUnited Airlines
Deal found 7/11£380
dom 30/1108:10SEA - LIS
1 stop17h 10mUnited Airlines
mer 10/1211:00LIS - SEA
2 stops32h 45mUnited Airlines
Deal found 7/11£382
lun 1/1210:53SEA - LIS
2 stops15h 22mUnited Airlines
mer 10/1211:00LIS - SEA
2 stops32h 45mUnited Airlines
Deal found 7/11£383
gio 4/1213:40SEA - LIS
1 stop17h 30mMultiple Airlines
gio 18/1210:00LIS - SEA
1 stop20h 23mMultiple Airlines
Deal found 6/11£386
gio 4/1208:10SEA - LIS
1 stop18h 05mUnited Airlines
gio 18/1210:55LIS - SEA
2 stops22h 04mUnited Airlines
Deal found 6/11£386
lun 29/1205:02SEA - LIS
2 stops21h 13mUnited Airlines
lun 12/110:15LIS - SEA
3 stops20h 28mUnited Airlines
Deal found 6/11£390
lun 10/1123:20SEA - LIS
1 stop25h 45mMultiple Airlines
mar 25/1111:05LIS - SEA
1 stop19h 05mMultiple Airlines
Deal found 5/11£397
sab 15/1123:59SEA - LIS
2 stops24h 11mUnited Airlines
lun 15/1205:00LIS - SEA
2 stops43h 07mUnited Airlines
Deal found 5/11£400
dom 30/1108:10SEA - LIS
1 stop17h 10mUnited Airlines
dom 14/1212:15LIS - SEA
1 stop31h 55mUnited Airlines
Deal found 7/11£402
mar 18/1107:00SEA - LIS
2 stops20h 35mLufthansa
gio 27/1112:25LIS - SEA
1 stop31h 45mLufthansa
Deal found 6/11£403

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 7 novembre 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

lun 17/11

08:00-08:10

2 stops16h 10m

Lisbon Humberto Delgado

mer 26/11

06:10-13:20

1 stop15h 10m

£380

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

lun 16/3

15:00-14:50

1 stop16h 50m

Lisbon Humberto Delgado

mer 25/3

06:10-14:20

1 stop15h 10m

£380

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

dom 11/1

08:10-09:20

1 stop17h 10m

Lisbon Humberto Delgado

dom 25/1

10:50-22:16

1 stop19h 26m

£385

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

sab 10/1

06:12-09:05

1 stop18h 53m

Lisbon Humberto Delgado

gio 22/1

10:55-22:07

1 stop19h 12m

£386

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

sab 21/2

09:55-15:10

2 stops21h 15m

Lisbon Humberto Delgado

sab 28/2

05:30-18:43

2 stops21h 13m

£386

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

lun 12/1

08:40-08:10

2 stops15h 30m

Lisbon Humberto Delgado

mar 20/1

11:20-23:15

2 stops19h 55m

£386

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

dom 15/3

16:10-13:20

1 stop14h 10m

Lisbon Humberto Delgado

mer 25/3

11:55-13:24

2 stops32h 29m

£390

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

dom 15/3

16:10-23:30

1 stop24h 20m

Lisbon Humberto Delgado

gio 26/3

11:55-12:20

2 stops31h 25m

£392

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

mar 18/11

05:05-10:15

2 stops21h 10m

Lisbon Humberto Delgado

gio 27/11

10:15-11:39

2 stops33h 24m

£405

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

mar 18/11

05:05-10:15

2 stops21h 10m

Lisbon Humberto Delgado

lun 24/11

05:00-12:10

1 stop15h 10m

£409

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 18 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 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 31 October 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 27 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 £270). Flying from Seattle to Lisbon in June is currently the most expensive (average of £777). 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 £380, United Airlines can have you in Lisbon from Seattle in 16h 10m. 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 £270). Flying from Seattle to Lisbon in June is currently the most expensive (average of £777). 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

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.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers 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?

Cheapflights helps you search for flights from Seattle to Lisbon via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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!

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.